CN108718103A - A kind of charging circuit, electronic equipment and wireless charging method - Google Patents
A kind of charging circuit, electronic equipment and wireless charging method Download PDFInfo
- Publication number
- CN108718103A CN108718103A CN201810623922.6A CN201810623922A CN108718103A CN 108718103 A CN108718103 A CN 108718103A CN 201810623922 A CN201810623922 A CN 201810623922A CN 108718103 A CN108718103 A CN 108718103A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- output
- control
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000009467 reduction Effects 0.000 claims abstract description 186
- 238000012545 processing Methods 0.000 claims abstract description 49
- 239000004065 semiconductor Substances 0.000 claims description 37
- 230000006837 decompression Effects 0.000 claims description 28
- 230000005611 electricity Effects 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 23
- 238000012546 transfer Methods 0.000 description 12
- 206010037660 Pyrexia Diseases 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000003276 anti-hypertensive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 102100021711 Ileal sodium/bile acid cotransporter Human genes 0.000 description 3
- 101710156096 Ileal sodium/bile acid cotransporter Proteins 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- H02J7/0077—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/073—Charge pumps of the Schenkel-type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/073—Charge pumps of the Schenkel-type
- H02M3/077—Charge pumps of the Schenkel-type with parallel connected charge pump stages
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention proposes a kind of charging circuit, electronic equipment and wireless charging method.Wherein, charging circuit includes：Wireless receiving module, the electric energy for receiving setting power supply transmitting, and export DC voltage；First reduction voltage circuit, the input terminal of the first reduction voltage circuit are connected with the output end of wireless receiving module, and the output end of the first reduction voltage circuit is connected with the input terminal of battery module, for being depressured to DC voltage；Second reduction voltage circuit, the input terminal of the second reduction voltage circuit are connected with the output end of wireless receiving module, and the output end of the second reduction voltage circuit is connected with the input terminal of battery module, for being depressured to DC voltage；Processing and control module, it is connected respectively with the output end of wireless receiving module, the control terminal of the first reduction voltage circuit, the control terminal of the second reduction voltage circuit, battery module, for according to cell voltage, or according to battery current and cell voltage, switch the power-up state of the first reduction voltage circuit and the second reduction voltage circuit.
Description
Technical field
The present invention relates to wireless charging technical fields, in particular to a kind of charging circuit, electronic equipment and wireless charging
Method for electrically.
Background technology
With the continuous promotion of terminal equipment configuration, terminal device becomes increasingly the demand and consumption of electricity
Greatly, due to comparing wired charging, wireless charging is more flexible, while eliminating the constraint of wire rod.As what wireless charging was supported fills
Electrical power is promoted, and more and more portable equipments (such as smart mobile phone) support wireless charging function.
In the related technology, the framework of the wireless charging used is that the conversion of wireless receiving end is followed by buck switch conversion electricity
Road, still, since buck conversion switch includes the outputting inductance there are coil loss and core loss, thus may
The decompression transfer efficiency of entire charging circuit can be caused relatively low so that charging circuit cannot achieve real large current charge (i.e.
Charging current is still smaller), and since the energy of outputting inductance loss would generally be converted to thermal energy, and then can also have charging circuit
The problem of fever.Electric charge pump module charging is even utilized, but the input voltage needs of charge pump charging can not be met
It is adjustable, and step wants small requirement.
Invention content
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, one aspect of the present invention is to propose a kind of charging circuit.
Another aspect of the present invention is to propose a kind of electronic equipment.
Another aspect of the invention is to propose a kind of wireless charging method.
In view of this, according to an aspect of the present invention, it proposes a kind of charging circuits, including：Wireless receiving module is used
In the electric energy of reception setting power supply transmitting, and export DC voltage；First reduction voltage circuit, the input terminal and nothing of the first reduction voltage circuit
The output end of line receiving module is connected, and the output end of the first reduction voltage circuit is connected with the input terminal of battery module, for pair
DC voltage is depressured；Second reduction voltage circuit, the input terminal of the second reduction voltage circuit are connected with the output end of wireless receiving module, the
The output end of two reduction voltage circuits is connected with the input terminal of battery module, for being depressured to DC voltage；Processing and control module, point
Not with wireless receiving module, the control terminal of the first reduction voltage circuit, the control terminal of the second reduction voltage circuit, the output end phase of battery module
Connection, for the cell voltage according to battery module, or according to the battery current and cell voltage of battery module, to the first drop
Volt circuit and the second reduction voltage circuit transmission the first reduction voltage circuit of control power on and the first control letter of the second reduction voltage circuit power down
Number, or the first reduction voltage circuit power down of control and the second control signal that powers on of the second reduction voltage circuit, with the first decompression of switching
The power-up state of circuit and the second reduction voltage circuit.
Charging circuit provided by the invention, the first reduction voltage circuit, the second reduction voltage circuit input terminal and wireless receiving module
Output end be connected, the first reduction voltage circuit, the output end of the second reduction voltage circuit are connected with the output end of battery module, first
Reduction voltage circuit, the second reduction voltage circuit control terminal be connected with processing and control module.Processing and control module according to cell voltage, or
Person switches the power-up state of the first reduction voltage circuit and the second reduction voltage circuit according to cell voltage and battery current, realizes switching the
One reduction voltage circuit or the second reduction voltage circuit are depressured the DC voltage of wireless receiving module, and then are supplied to battery module,
Wireless charging is carried out for battery module.Technical solution using the present invention uses corresponding decompression electricity in the different charging stages
Road can promote decompression transfer efficiency, avoid charging Wen Sheng higher, and then improve the wireless charging efficiency of battery.
Above-mentioned charging circuit according to the present invention can also have following technical characteristic：
In the above-mentioned technical solutions, it is preferable that processing and control module is specifically used for being less than first voltage threshold in cell voltage
When value, second control signal is sent, and then be depressured to DC voltage by the second reduction voltage circuit；It is more than or equal to first in cell voltage
Voltage threshold or cell voltage are equal to second voltage threshold value and when battery current are more than or equal to current threshold, send the first control
Signal processed, and then DC voltage is depressured by the first reduction voltage circuit, wherein first voltage threshold value is less than second voltage threshold value；In electricity
When cell voltage is equal to second voltage threshold value and battery current and is less than current threshold, second control signal is sent, and then by the second drop
Volt circuit is depressured DC voltage.
In the technical scheme, first voltage threshold value is less than second voltage threshold value, is less than first voltage threshold in cell voltage
When value, i.e., before entering the constant current mode stage, controls the first reduction voltage circuit power down and the second reduction voltage circuit powers on, Jin Eryou
Second reduction voltage circuit is depressured DC voltage；Be more than or equal to first voltage threshold value in cell voltage, i.e., at the constant current mode stage,
Or cell voltage is when being equal to second voltage threshold value and battery current and being more than or equal to current threshold, i.e., in the high current of constant voltage mode
In the stage, the first reduction voltage circuit of control powers on and the second reduction voltage circuit power down, and then by the first reduction voltage circuit to direct current pressure drop
Pressure；When cell voltage is equal to second voltage threshold value and battery current is less than current threshold, i.e., in the low current rank of constant voltage mode
Section, controls the first reduction voltage circuit power down and the second reduction voltage circuit powers on, and then is depressured to DC voltage by the second reduction voltage circuit,
It can realize to use that there is high decompression transfer efficiency than the second reduction voltage circuit in the high current stage of constant current mode and constant voltage mode
And the first reduction voltage circuit of the characteristics such as few fever is depressured, and decompression transfer efficiency is improved, and reduces battery module fever.
In any of the above-described technical solution, it is preferable that the first reduction voltage circuit includes one or more conversion in parallel
Branch, each converting branch include one or more voltage-regulating circuit and one or more concatenated charge pump
Module；Or first reduction voltage circuit include voltage-regulating circuit and one or more converting branch in parallel, Mei Gezhuan
It includes one or more concatenated electric charge pump module to change branch；For any voltage adjustment circuit, voltage-regulating circuit
Input terminal is connected with the output end of wireless receiving module, the output end of voltage-regulating circuit and the input terminal phase of electric charge pump module
Connection, the control terminal of voltage-regulating circuit, the feedback end of voltage-regulating circuit are connected with processing and control module, are used for basis
PWM (Pulse Width Modulation, pulse width modulation) signal of processing and control module output adjusts DC voltage
To set the voltage of amplitude, and export to electric charge pump module；For any electric charge pump module, the output end of electric charge pump module and its
The input terminal of its electric charge pump module or the input terminal of battery module are connected, the control terminal and processing and control module of electric charge pump module
It is connected, for being depressured to the voltage for setting amplitude, and by the voltage output of the setting amplitude after decompression to other charges
Pump module or battery module.
In the technical scheme, the first reduction voltage circuit includes one or more converting branch in parallel, each to convert
Branch includes one or more voltage-regulating circuit and one or more concatenated electric charge pump module；Or first
Reduction voltage circuit includes voltage-regulating circuit and one or more converting branch in parallel, and each converting branch includes one
Or more than two concatenated electric charge pump modules.Voltage-regulating circuit and wireless receiving module, electric charge pump module, processing and control module
It is connected, electric charge pump module is connected with voltage-regulating circuit, processing and control module, battery module.Due to electric charge pump module
Input voltage needs adjustable and step to want small, so be that electric charge pump module realizes fine pressure regulation by voltage-regulating circuit,
DC voltage is adjusted to the electricity of setting amplitude by the pwm signal that specially voltage-regulating circuit is exported according to processing and control module
Pressure, and then is supplied to electric charge pump module, it is ensured that electric charge pump module is to the antihypertensive effect of DC voltage, to realize battery module
Large current charge.
In any of the above-described technical solution, it is preferable that voltage-regulating circuit, including：External pwm circuit, external pwm circuit
Control terminal of the input terminal as voltage-regulating circuit；Control driving circuit, control the first input end of driving circuit with it is external
The output end of pwm circuit is connected, and controls the reference voltage output terminal of the second input terminal and control driving circuit of driving circuit
It is connected, controls the output of the third input terminal of driving circuit and the BUCK circuits (Buck conversion circuit) of voltage-regulating circuit
The feedback end of voltage is connected；The switch control terminal of BUCK circuits, BUCK circuits is connected with the output end of control driving circuit；
When controlling the voltage for the second input terminal that the voltage of first input end of driving circuit is less than control driving circuit, control driving
Circuit controls BUCK according to the voltage difference of the third input terminal and the first input end of control driving circuit of control driving circuit
The output voltage of circuit reaches setting voltage, and the output voltage of BUCK circuits and the input pwm signal of external pwm circuit are deposited at this time
In linear relationship, the voltage of setting amplitude is calculated according to cell voltage, by the input pwm signal tune for adjusting external pwm circuit
The output voltage of whole BUCK circuits extremely sets the voltage of amplitude.
In the technical scheme, voltage-regulating circuit includes external pwm circuit, control driving circuit, BUCK circuits.First
By control driving circuit according to the error of its input voltage and the feedback voltage of the output voltage of BUCK circuits, by BUCK circuits
Output voltage is adjusted to setting voltage.Specifically, when the voltage of the first input end of control driving circuit is less than its second input
When holding the voltage of (reference voltage), by the voltage (feedback voltage of the output voltage of BUCK circuits) of its third input terminal and its
The voltage difference of one input terminal is adjusted to setting voltage as error, by the output voltage of BUCK circuits, at this point, BUCK circuits
There are linear relationships for the input pwm signal of output voltage and external pwm circuit, and the voltage of setting amplitude is calculated according to cell voltage
(i.e. voltage needed for BUCK circuits), the input pwm signal by adjusting external pwm circuit can be adjusted the output electricity of BUCK circuits
It is depressed into required voltage, fine adjustable voltage can be provided for electric charge pump module, it is ensured that decompression of the electric charge pump module to DC voltage
Effect.
In any of the above-described technical solution, it is preferable that external pwm circuit includes first resistor, second resistance, third electricity
Resistance, the first capacitance；First resistor, 3rd resistor are sequentially connected, and first resistor is also connected with processing and control module, 3rd resistor
Also it is connected with the first input end of control driving circuit；One end of first capacitance is connected to 3rd resistor and control driving circuit
First input end between, the other end of the first capacitance is connected to ground terminal；One end of second resistance is connected to first resistor and the
Between three resistance, the other end of second resistance is connected to ground terminal.
In the technical scheme, it is divided by first resistor and second resistance, and passes through 3rd resistor and first
Capacitance carries out low-pass filtering, to realize the fine pressure regulation to DC voltage according to the pwm signal of processing and control module output.
In any of the above-described technical solution, it is preferable that external pwm circuit further includes：4th resistance, the one of the 4th resistance
End is connected between 3rd resistor and the first capacitance, and the other end of the 4th resistance is connected to the first input of control driving circuit
End；One end of second capacitance, the second capacitance is connected between the 4th resistance and the first input end for controlling driving circuit, the second electricity
The other end of resistance is connected to ground terminal.
In the technical scheme, external pwm circuit includes the 4th resistance and the second capacitance, and the 4th resistance and the second capacitance are
One RC (Resistance Capacitance, resistance capacitance) filter circuit, plays filter action, while the second capacitance may be used also
Play the role of soft start.
In any of the above-described technical solution, it is preferable that control driving circuit includes offset constant current source, error amplifier, arteries and veins
Wide modulator, sawtooth wave output circuit, logic controller, driving circuit；The output end of offset constant current source is connected to 3rd resistor
Between the first input end of control driving circuit；The first input end of error amplifier in order to control driving circuit first input
End, the second input terminal of the second input terminal of error amplifier driving circuit in order to control, the third input terminal of error amplifier are
Control the third input terminal of driving circuit；The first input end of pulse width modulator is connected with the output end of error amplifier, arteries and veins
Second input terminal of wide modulator is connected with the output end of sawtooth wave output circuit；The input terminal of logic controller and pulsewidth tune
The output end of device processed is connected, and the output end of logic controller is connected with the input terminal of driving circuit；The output of driving circuit
End is connected with the switch control terminal of BUCK circuits；When the voltage of the first input end of error amplifier is less than error amplifier
When the voltage of the second input terminal, the output voltage of error amplifier is the third input terminal and error amplifier of error amplifier
The voltage difference of first input end, when the voltage of the first input end of error amplifier is more than or equal to the second defeated of error amplifier
When entering the voltage at end, the output voltage of error amplifier be error amplifier third input terminal and error amplifier it is second defeated
Enter the voltage difference at end；The sawtooth wave that pulse width modulator generates the output voltage of error amplifier and sawtooth wave output circuit into
Row compares, and generates pulse control signal, and logic controller controls driving circuit according to pulse control signal and drives BUCK circuits, makes
The output voltage of BUCK circuits reaches setting voltage.
In the technical scheme, error amplifier is used for obtaining the value of feedback of BUCK circuit output voltages and by biasing constant current
The voltage difference (error) of the reference voltage of voltage or control driving circuit that source provides, and gain is exported to pulsewidth modulation
Device, pulse width modulator compared with the sawtooth wave that sawtooth wave output circuit generates, are generated by error amplifier and are used for pulsewidth modulation
Pwm pulse control signal, and export to logic controller, then pass through driving circuit drive BUCK circuits MOS (Metal
Oxide Semiconductor, metal-oxide semiconductor (MOS)) pipe closure and disconnection, so that the output voltage of BUCK circuits is reached
One stable setting voltage.
In any of the above-described technical solution, it is preferable that sawtooth wave output circuit, including：Saw-toothed wave generator, sawtooth wave hair
The output end of raw device is connected with the second input terminal of pulse width modulator；Oscillator, input terminal and the DC power supply phase of oscillator
Connection, the output end of oscillator are connected with the input terminal of saw-toothed wave generator.
In the technical scheme, by oscillator and saw-toothed wave generator, sawtooth wave is generated, to obtain accurate pulse
Control signal.
In any of the above-described technical solution, it is preferable that BUCK circuits include the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, inductance, third
Capacitance, the 5th resistance, the 6th resistance；The grid of first metal-oxide-semiconductor is connected with the first output end of driving circuit, the first metal-oxide-semiconductor
Drain electrode be connected to the output end of wireless receiving module, the source electrode of the first metal-oxide-semiconductor is connected with the drain electrode of the second metal-oxide-semiconductor；Second
The grid of metal-oxide-semiconductor is connected with the second output terminal of driving circuit, and the source electrode of the first metal-oxide-semiconductor is connected to ground terminal；One end of inductance
It is connected between the source electrode of the first metal-oxide-semiconductor and the drain electrode of the second metal-oxide-semiconductor, the other end of inductance is connected to the output of BUCK circuits
End；One end of third capacitance is connected to the output end of BUCK circuits, and the other end of third capacitance is connected to ground terminal；5th resistance
One end is connected to the output end of BUCK circuits, and the other end of the 5th resistance is connected with one end of the 6th resistance；6th resistance
The other end is connected to ground terminal.
In any of the above-described technical solution, it is preferable that any point between the 5th resistance and the 6th resistance is BUCK circuits
Output voltage feedback end.
In the technical scheme, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, inductance, third capacitance constitute basic BUCK circuits, BUCK
The output voltage of circuit carries out partial pressure feedback by the 5th resistance and the 6th resistance, to make the output voltage of BUCK circuits be adjusted
It saves to a stationary value.
In any of the above-described technical solution, it is preferable that BUCK circuits further include：One end of 7th resistance, the 7th resistance connects
It is connected to the output end of BUCK circuits, the other end of the 7th resistance is connected with one end of the 8th resistance；8th resistance, the 8th resistance
The other end be connected to ground terminal.
In any of the above-described technical solution, it is preferable that any point between the 7th resistance and the 8th resistance is as voltage tune
The feedback end of whole circuit；According to the feedback voltage of the feedback end of voltage-regulating circuit, the PWM letters of processing and control module output are adjusted
Number, and then adjust the voltage of setting amplitude.
In the technical scheme, the 7th resistance and the 8th resistance are designed, by the 7th resistance and the 8th electric resistance partial pressure, to supervise
The output voltage for surveying BUCK circuits, feeds back to processing and control module, is finely adjusted to output voltage, practically necessary to reach
Output voltage.
In any of the above-described technical solution, it is preferable that the second reduction voltage circuit is buck conversion switch.
In the technical scheme, the second reduction voltage circuit be buck conversion switch, enter constant current mode before with
And the DC voltage of wireless receiving module is depressured under the low current stage of constant voltage mode, battery module is filled in realization
Electricity.
In any of the above-described technical solution, it is preferable that further include：Battery module；Battery module, including：Protection module；Electricity
Gauge module, voltameter module are connected with processing and control module, and voltameter module is for detecting cell voltage and battery current.
In the technical scheme, battery module is usually lithium battery, and battery module includes protection module and voltameter mould
Block, protection module are used to carry out overvoltage or overcurrent protection to battery module, and voltameter module is for detecting cell voltage and electricity
Pond electric current, and it is transferred to processing and control module, it is ensured that processing and control module accurately judges that the charging stage.
According to another aspect of the present invention, it is proposed that a kind of electronic equipment includes the charging circuit of any of the above-described.
Electronic equipment provided by the invention includes the charging circuit of any of the above-described, can realize such as any of the above-described
Whole advantageous effects of charging circuit.
According to a further aspect of the invention, it is proposed that a kind of wireless charging method, the charging electricity for any of the above-described
Road, method include：Obtain the cell voltage and battery current of battery module；According to cell voltage, or according to cell voltage and
Battery current, to the first reduction voltage circuit and the second reduction voltage circuit transmission the first reduction voltage circuit of control powers on and the second reduction voltage circuit
The first control signal of power down, or the second control that the first reduction voltage circuit power down of control and the second reduction voltage circuit power on are believed
Number, to switch the power-up state of the first reduction voltage circuit and the second reduction voltage circuit.
Wireless charging method provided by the invention obtains the cell voltage and battery current of battery module, according to battery electricity
Pressure, or according to the power-up state of cell voltage and battery current the first reduction voltage circuit of switching and the second reduction voltage circuit, realize
Switch the first reduction voltage circuit or the second reduction voltage circuit is depressured the DC voltage of wireless receiving module, and then is supplied to battery
Module carries out wireless charging for battery module.Technical solution using the present invention uses corresponding drop in the different charging stages
Volt circuit can promote decompression transfer efficiency, avoid charging Wen Sheng higher, and then improve the wireless charging efficiency of battery.
Above-mentioned wireless charging method according to the present invention can also have following technical characteristic：
In the above-mentioned technical solutions, it is preferable that when cell voltage is less than first voltage threshold value, send the second control letter
Number, and then DC voltage is depressured by the second reduction voltage circuit；When cell voltage is more than or equal to first voltage threshold value or battery electricity
When pressure is more than or equal to current threshold equal to second voltage threshold value and battery current, first control signal is sent, and then by the first drop
Volt circuit is depressured DC voltage, and wherein first voltage threshold value is less than second voltage threshold value；When cell voltage is equal to second voltage
When threshold value and battery current are less than current threshold, second control signal is sent, and then by the second reduction voltage circuit to direct current pressure drop
Pressure.
In the technical scheme, first voltage threshold value is less than second voltage threshold value, is less than first voltage threshold in cell voltage
When value, i.e., before entering the constant current mode stage, controls the first reduction voltage circuit power down and the second reduction voltage circuit powers on, Jin Eryou
Second reduction voltage circuit is depressured DC voltage；Be more than or equal to first voltage threshold value in cell voltage, i.e., at the constant current mode stage,
Or cell voltage is when being equal to second voltage threshold value and battery current and being more than or equal to current threshold, i.e., in the high current of constant voltage mode
In the stage, the first reduction voltage circuit of control powers on and the second reduction voltage circuit power down, and then by the first reduction voltage circuit to direct current pressure drop
Pressure；When cell voltage is equal to second voltage threshold value and battery current is less than current threshold, i.e., in the low current rank of constant voltage mode
Section, controls the first reduction voltage circuit power down and the second reduction voltage circuit powers on, and then is depressured to DC voltage by the second reduction voltage circuit,
It can realize to use that there is high decompression transfer efficiency than the second reduction voltage circuit in the high current stage of constant current mode and constant voltage mode
And the first reduction voltage circuit of the characteristics such as few fever is depressured, and decompression transfer efficiency is improved, and reduces battery module fever.
In any of the above-described technical solution, it is preferable that when cell voltage is more than or equal to first voltage threshold value, according to battery
Voltage calculates the required voltage of the BUCK circuits of the first reduction voltage circuit, adjusts pwm signal to adjust the output voltage of BUCK circuits
To required voltage.
In the technical scheme, it is more than or equal to first voltage threshold value in cell voltage, i.e., at the constant current mode stage, moreover it is possible to
The required voltage of enough BUCK circuits that the first reduction voltage circuit is calculated according to cell voltage adjusts pwm signal to adjust BUCK circuits
Output voltage provide fine adjustable voltage to required voltage, and then for electric charge pump module, it is ensured that electric charge pump module is to direct current
The antihypertensive effect of voltage, to realize the large current charge of battery module.
In any of the above-described technical solution, it is preferable that when cell voltage is more than or equal to first voltage threshold value, according to BUCK
The value of feedback of the output voltage of circuit adjusts pwm signal to adjust the output voltages of BUCK circuits to required voltage.
In the technical scheme, the value of feedback of the output voltage of monitoring BUCK circuits, is finely adjusted output voltage, so as to
Reach practically necessary output voltage.
The additional aspect and advantage of the present invention will become apparent in following description section, or practice through the invention
Recognize.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the structure chart of the charging circuit of one embodiment of the present of invention；
Fig. 2 a show the structure chart of the charging circuit of an alternative embodiment of the invention；
Fig. 2 b show the structure chart of the charging circuit of yet another embodiment of the present invention；
Fig. 2 c show the structure chart of the charging circuit of another embodiment of the present invention；
Fig. 3 a show the electrical block diagram of the electric charge pump module of one embodiment of the invention；
Fig. 3 b show the electrical block diagram of the electric charge pump module of another embodiment of the present invention；
Fig. 4 shows the structure chart of the voltage-regulating circuit of one embodiment of the present of invention；
Fig. 5 shows the flow chart of the wireless charging method of one embodiment of the present of invention；
Fig. 6 shows the flow chart of the wireless charging method of the specific embodiment of the present invention.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not limited to following public affairs
The limitation for the specific embodiment opened.
The embodiment of first aspect present invention proposes that a kind of charging circuit, Fig. 1 show one embodiment of the present of invention
The structure chart of charging circuit.Wherein, which includes：
Wireless receiving module 102, the electric energy for receiving setting power supply transmitting, and export DC voltage；
The input terminal of first reduction voltage circuit 104, the first reduction voltage circuit 104 is connected with the output end of wireless receiving module 102
It connects, the output end of the first reduction voltage circuit 104 is connected with the input terminal of battery module 106, for being depressured to DC voltage；
The input terminal of second reduction voltage circuit 108, the second reduction voltage circuit 108 is connected with the output end of wireless receiving module 102
It connects, the output end of the second reduction voltage circuit 108 is connected with the input terminal of battery module 106, for being depressured to DC voltage；
Processing and control module 110 is dropped with wireless receiving module 102, the control terminal of the first reduction voltage circuit 104, second respectively
The control terminal of volt circuit 108, the output end of battery module 106 are connected, for the cell voltage according to battery module 106, or
Person sends according to the battery current and cell voltage of battery module 106 to the first reduction voltage circuit 104 and the second reduction voltage circuit 108
It controls the first reduction voltage circuit 104 to power on and the first control signal of 108 power down of the second reduction voltage circuit, or the first decompression of control
The second control signal that 104 power down of circuit and the second reduction voltage circuit 108 power on, to switch the first reduction voltage circuit 104 and second
The power-up state of reduction voltage circuit 108.
Charging circuit provided by the invention, the first reduction voltage circuit 104, the second reduction voltage circuit 108 input terminal with wirelessly connect
The output end for receiving module 102 is connected, the first reduction voltage circuit 104, the output end of the second reduction voltage circuit 108 and battery module 106
Output end be connected, the first reduction voltage circuit 104, the second reduction voltage circuit 108 control terminal be connected with processing and control module 110
It connects.Processing and control module 110 switches the first reduction voltage circuit 104 according to cell voltage, or according to cell voltage and battery current
And second reduction voltage circuit 108 power-up state, realize switching the first reduction voltage circuit 104 or the second reduction voltage circuit 108 to wireless
The DC voltage of receiving module 102 is depressured, and then is supplied to battery module 106, and wireless charging is carried out for battery module 106
Electricity.Technical solution using the present invention uses corresponding reduction voltage circuit in the different charging stages, can promote decompression conversion effect
Rate avoids charging Wen Sheng higher, and then improves the wireless charging efficiency of battery.
Preferably, processing and control module 110 are specifically used for, when cell voltage is less than first voltage threshold value, sending second
Signal is controlled, and then DC voltage is depressured by the second reduction voltage circuit 108；It is more than or equal to first voltage threshold value in cell voltage,
Or cell voltage sends first control signal when being equal to second voltage threshold value and battery current and being more than or equal to current threshold, into
And DC voltage is depressured by the first reduction voltage circuit 104, wherein first voltage threshold value is less than second voltage threshold value；In cell voltage
When being less than current threshold equal to second voltage threshold value and battery current, second control signal is sent, and then by the second reduction voltage circuit
108 pairs of DC voltage decompressions.
In this embodiment, first voltage threshold value is less than second voltage threshold value, is less than first voltage threshold value in cell voltage
When, i.e., before entering the constant current mode stage, controls 104 power down of the first reduction voltage circuit and the second reduction voltage circuit 108 powers on, into
And DC voltage is depressured by the second reduction voltage circuit 108；It is more than or equal to first voltage threshold value in cell voltage, i.e., in constant current mode
When the stage or when cell voltage is equal to second voltage threshold value and battery current and is more than or equal to current threshold, i.e., in constant voltage mode
The high current stage, the first reduction voltage circuit 104 of control powers on and 108 power down of the second reduction voltage circuit, and then by the first decompression electricity
Road 104 is depressured DC voltage；When cell voltage is equal to second voltage threshold value and battery current is less than current threshold, i.e., in perseverance
The low current stage of die pressing type controls 104 power down of the first reduction voltage circuit and the second reduction voltage circuit 108 powers on, and then by second
Reduction voltage circuit 108 is depressured DC voltage, can realize and be used than second in the high current stage of constant current mode and constant voltage mode
There is reduction voltage circuit 108 first reduction voltage circuit 104 of the characteristics such as high decompression transfer efficiency and few fever to be depressured, and improve drop
Transfer efficiency is pressed, battery module 106 is reduced and generates heat.
Fig. 2 a to Fig. 2 c show the structure chart of the charging circuit of the present invention.Wherein, which includes：
Wireless receiving module 202, the electric energy for receiving setting power supply transmitting, and export DC voltage；
The input terminal of first reduction voltage circuit 204, the first reduction voltage circuit 204 is connected with the output end of wireless receiving module 202
It connects, the output end of the first reduction voltage circuit 204 is connected with the input terminal of battery module 206, for being depressured to DC voltage；
Buck conversion switch 208, input terminal and the wireless receiving module 202 of buck conversion switch 208
Output end be connected, the output end of buck conversion switch 208 is connected with the input terminal of battery module 206, is used for
DC voltage is depressured；
As shown in Figure 2 a, the first reduction voltage circuit 204 includes：One or more converting branch in parallel, it is each to convert
Branch include voltage-regulating circuit (first voltage adjustment circuit 2412, second voltage adjustment circuit 2422 ..., N voltages
Adjustment circuit 24N2, N are positive integer) and one or more concatenated electric charge pump module (first charge pump of the first branch
Module 2611 ..., first branch M electric charge pump module 261M, the first electric charge pump module of the second branch 2621 ...,
The second branch Q electric charge pump modules 262Q, the first electric charge pump module of N branches 26N1 ..., N branch P charge pump moulds
Block 26NP, M, Q, P are positive integer, and N, M, Q, P are equal or unequal)；Or
As shown in Figure 2 b, the first reduction voltage circuit 204 includes：One or more converting branch in parallel, it is each to convert
Branch include more than two voltage-regulating circuits (first branch voltage-regulating circuit 2411 ..., the adjustment of first branch voltage
Circuit 241M, the second branch voltage-regulating circuit 2421 ..., the second branch voltage-regulating circuit 242Q, N branch voltages
Adjustment circuit 24N1 ..., N branch voltages adjustment circuit 24NP, N, M, Q, P are positive integer, and N, M, Q, P are equal or not
It is equal), and more than two concatenated electric charge pump module (the first electric charge pump module of the first branch 2611 ..., the first branch
M electric charge pump module 261M, the first electric charge pump module of the second branch 2621 ..., the second branch Q electric charge pump modules
262Q, the first electric charge pump module of N branches 26N1 ..., N branch P electric charge pump module 26NP)；Or
As shown in Figure 2 c, the first reduction voltage circuit 204 includes voltage-regulating circuit 240 and one or more is in parallel
Converting branch, each converting branch include one or more the concatenated electric charge pump module (first branch the first charge pump mould
Block 2611 ..., first branch M electric charge pump module 261M, the first electric charge pump module of the second branch 2621 ...,
Two branch Q electric charge pump modules 262Q, the first electric charge pump module of N branches 26N1 ..., N branch P electric charge pump modules
26NP, N, M, Q, P are positive integer, and N, M, Q, P are equal or unequal).
It should be noted that Fig. 2 a to Fig. 2 c are only enumerating for 204 structure of the first reduction voltage circuit, not the first reduction voltage circuit
204 entire infrastructure situation.
For any voltage adjustment circuit, the input terminal of voltage-regulating circuit and the output end phase of wireless receiving module 202
Connection, the output end of voltage-regulating circuit are connected with the input terminal of electric charge pump module, the control terminal of voltage-regulating circuit, voltage
The feedback end of adjustment circuit is connected with processing and control module 210, and the PWM for being exported according to processing and control module 210 believes
Number DC voltage is adjusted to the voltage of setting amplitude, and exported to electric charge pump module；
For any electric charge pump module, the input terminal or battery mould of the output end of electric charge pump module and other electric charge pump modules
The input terminal of block 206 is connected, and the control terminal of electric charge pump module is connected with processing and control module 210, for setting amplitude
Voltage be depressured, and by the voltage output of the setting amplitude after decompression to other electric charge pump modules or battery module 206, use
In the large current charge of battery module 206；
Buck conversion switch 208, input terminal and the wireless receiving module 202 of buck conversion switch 208
Output end be connected, the output end of buck conversion switch 208 is connected with the input terminal of battery module 206, is used for
DC voltage is depressured, the low current charge of battery module 206 is used for；
Processing and control module 210, for portable device, generally processor, respectively with wireless receiving module 202,
The control terminal of one reduction voltage circuit, the control terminal of buck conversion switch 208, battery module 206 output end be connected, use
In the cell voltage according to battery module 206, or according to the battery current and cell voltage of battery module 206, to the first drop
Volt circuit and buck conversion switch 208 send the first reduction voltage circuit of control and power on and buck conversion switch
The first control signal of 208 power down, or the first reduction voltage circuit power down of control and buck conversion switch 208 power on
Second control signal, to switch the power-up state of the first reduction voltage circuit and buck conversion switch 208；
In this embodiment, voltage-regulating circuit and wireless receiving module 202, electric charge pump module, processing and control module 210
It is connected, electric charge pump module is connected with voltage-regulating circuit, processing and control module 210, battery module 206.Due to charge pump
The input voltage of module needs adjustable and step to want small, so being that electric charge pump module realizes fine by voltage-regulating circuit
DC voltage is adjusted to setting width by the pwm signal that pressure regulation, specially voltage-regulating circuit are exported according to processing and control module 210
The voltage of value, and then be supplied to electric charge pump module, it is ensured that electric charge pump module is to the antihypertensive effect of DC voltage, to realize battery
The large current charge of module 206.
Fig. 3 a show the electrical block diagram of the electric charge pump module of one embodiment of the invention.By Fig. 3 a it is found that needle
To any electric charge pump module (any one electric charge pump module as shown in Fig. 2 a, Fig. 2 b or Fig. 2 c), including first switch Q1,
Second switch Q2, third switch Q3, the second capacitance of the 4th switch Q4, electric charge pump module the first capacitance C11 and electric charge pump module
C12, wherein：
Such as it is the first branch when electric charge pump module is first charge pump transform subblock in its place converting branch
First electric charge pump module 2611, the first electric charge pump module of the second branch 2621 or the first electric charge pump module of N branches 26N1 etc.,
The input terminal of the first switch Q1 can be connected with the output end of voltage-regulating circuit 240；Turn where electric charge pump module is it
When changing the rear class electric charge pump module in branch, the output end of first switch Q1 can be with the output end phase of previous stage electric charge pump module
Even, output end is connected with the first end of the input terminal of third switch Q3, the first capacitance of electric charge pump module C11；Second switch Q2's
Input terminal is connected with the input terminal of the second end of the first capacitance of electric charge pump module C11 and the 4th switch Q4, output end and charge
The first end of the second capacitance of pump module C12 and the output end of third switch Q3 are connected；The output end and charge of 4th switch Q4
The second end of the second capacitance of pump module C12 is connected, and as public negative terminal；The input terminal of first switch Q1 is as electric charge pump module
Input terminal, the output end of second switch Q2, the output end of third switch Q3 or the second capacitance of electric charge pump module C12 first
Hold the output end as electric charge pump module.
It should be noted that the control terminal of each switching device in electric charge pump module can be with 210 phase of processing and control module
Even, for being connected or turning off under the control of processing and control module 210.For example, being sent receiving processing and control module 210
The first drive signal when, be connected electric charge pump module in first switch Q1 and second switch Q2, close electric charge pump module in
Third switch Q3 and the 4th switch Q4, thus may make the electric energy of wireless receiving module 202 into the electric charge pump module
Capacitance and battery module 206 charge；When receiving the second drive signal of the transmission of processing and control module 210, electric conduction
Third switch Q3 in lotus pump module and the 4th switch Q4 closes first switch Q1 and second switch in electric charge pump module
Q2, thus may make the capacitance in electric charge pump module that can charge to battery module 206.
Fig. 3 b show the electrical block diagram of the electric charge pump module of one embodiment of the invention.By Fig. 3 b it is found that electricity
Lotus pump module may also include electric charge pump module third capacitance C13, wherein：
When electric charge pump module is first electric charge pump module in its place converting branch, electric charge pump module third capacitance
The first end of C13 can be connected with 202 output end of wireless receiving module；Rear class in converting branch where electric charge pump module is it
When electric charge pump module, the first end of electric charge pump module third capacitance C13 can be connected with the output end of previous stage electric charge pump module, the
Two ends are connected with the output end of the second end of the second capacitance of electric charge pump module C12 and the 4th switch Q4.
Wherein, the first switch Q1 and second that electric charge pump module third capacitance C13 can be used in electric charge pump module are opened
When closing Q2 unlatchings, third switch Q3 and the 4th switch Q4 closings, capacitance (the i.e. electric charge pump module first into electric charge pump module
The second capacitance C12 of capacitance C11 and electric charge pump module) and the progress current compensation of battery module 206.
Preferably, as shown in figure 4, voltage-regulating circuit, including：
External pwm circuit 242, the control terminal of the input terminal of external pwm circuit 242 as voltage-regulating circuit.
Driving circuit 244 is controlled, the output end phase of the first input end and external pwm circuit 242 of driving circuit 244 is controlled
Connection, the second input terminal for controlling driving circuit 244 are connected with the reference voltage output terminal of control driving circuit 244, control
The third input terminal of driving circuit 244 is connected with the feedback end of the output voltage of the BUCK circuits 246 of voltage-regulating circuit.
The switch control terminal of BUCK circuits 246, BUCK circuits 246 is connected with the output end of control driving circuit 244.
External pwm circuit 242 includes：First resistor R1, second resistance R2,3rd resistor R3, the first capacitance C1, the 4th electricity
Hinder R4, the second capacitance C2.
First resistor R1,3rd resistor R3 are sequentially connected, and first resistor R1 is also connected with processing and control module 210, the
Three resistance R3 are also connected with the first input end of control driving circuit 244；One end of first capacitance C1 is connected to 3rd resistor
Between R3 and the first input end for controlling driving circuit 244, the other end of the first capacitance C1 is connected to ground terminal；Second resistance R2's
One end is connected between first resistor R1 and 3rd resistor R3, and the other end of second resistance R2 is connected to ground terminal.4th resistance R4
One end be connected between 3rd resistor R3 and the first capacitance C1, the other end of the 4th resistance R4 is connected to control driving circuit
244 first input end；One end of second capacitance C2 is connected to the 4th resistance R4 and controls the first input end of driving circuit 244
Between, the other end of second resistance R2 is connected to ground terminal.In this embodiment, it is carried out by first resistor R1 and second resistance R2
Partial pressure, and low-pass filtering is carried out by 3rd resistor R3 and the first capacitance C1, to what is exported according to processing and control module 210
Pwm signal realizes the fine pressure regulation to DC voltage.External pwm circuit 242 include the 4th resistance R4 and the second capacitance C2, the 4th
Resistance R4 and the second capacitance C2 is a RC filter circuit, plays filter action, while the second capacitance C2 may also function as soft start
Effect.
Controlling driving circuit 244 includes：Offset constant current source 400, error amplifier 402, pulse width modulator 404, sawtooth wave
Output circuit, logic controller 406, driving circuit 408.
The output end of offset constant current source 400 be connected to 3rd resistor R3 with control driving circuit 244 first input end it
Between；The first input end of the first input end SS of error amplifier 402 driving circuits 244 in order to control, the of error amplifier 402
Second input terminal of two input terminal REF driving circuits 244 in order to control, the third input terminal FB1 of error amplifier 402 drive in order to control
The third input terminal of dynamic circuit 244；The first input end of pulse width modulator 404 is connected with the output end of error amplifier 402,
Second input terminal of pulse width modulator 404 is connected with the output end of sawtooth wave output circuit；The input terminal of logic controller 406
It is connected with the output end of pulse width modulator 404, the output end of logic controller 406 is connected with the input terminal of driving circuit 408
It connects；The output end of driving circuit 408 is connected with the switch control terminal of BUCK circuits 246；First when error amplifier 402 is defeated
Enter to hold SS voltage be less than error amplifier 402 the second input terminal REF voltage when, the output voltage of error amplifier 402
For the voltage difference of the first input end SS of the third input terminal FB1 and error amplifier 402 of error amplifier 402, work as error
When the voltage of the first input end SS of amplifier 402 is more than or equal to the voltage of the second input terminal REF of error amplifier 402, accidentally
The output voltage of poor amplifier 402 is the third input terminal FB1 of error amplifier 402 and the second input of error amplifier 402
Hold the voltage difference of REF；Pulse width modulator 404 generates the output voltage of error amplifier 402 and sawtooth wave output circuit
Sawtooth wave is compared, and generates pulse control signal, and logic controller 406 controls driving circuit 244 according to pulse control signal
BUCK circuits 246 are driven, the output voltage of BUCK circuits 246 is made to reach setting voltage.
Sawtooth wave output circuit, including：Saw-toothed wave generator 410, the output end of saw-toothed wave generator 410 and pulsewidth modulation
Second input terminal of device 404 is connected；The input terminal of oscillator 412, oscillator 412 is connected with DC power supply, oscillator 412
Output end be connected with the input terminal of saw-toothed wave generator 410.In this embodiment, it is sent out by oscillator 412 and sawtooth wave
Raw device 410, generates sawtooth wave, to obtain accurate pulse control signal.
BUCK circuits 246 include：First metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, inductance L, third capacitance C3, the 5th resistance R5,
6th resistance R6, the 7th resistance R7, the 8th resistance R8.
The grid of first metal-oxide-semiconductor S1 is connected with the first output end of driving circuit 408, and the drain electrode of the first metal-oxide-semiconductor S1 connects
It is connected to the output end of wireless receiving module 202, the source electrode of the first metal-oxide-semiconductor S1 is connected with the drain electrode of the second metal-oxide-semiconductor S2；Second
The grid of metal-oxide-semiconductor S2 is connected with the second output terminal of driving circuit 408, and the source electrode of the first metal-oxide-semiconductor S1 is connected to ground terminal；Inductance
One end of L is connected between the source electrode of the first metal-oxide-semiconductor S1 and the drain electrode of the second metal-oxide-semiconductor S2, and the other end of inductance L is connected to BUCK
The output end of circuit 246；One end of third capacitance C3 is connected to the output end of BUCK circuits 246, the other end of third capacitance C3
It is connected to ground terminal；One end of 5th resistance R5 is connected to the output end of BUCK circuits 246, the other end and the 6th of the 5th resistance R5
One end of resistance R6 is connected；The other end of 6th resistance R6 is connected to ground terminal.Between 5th resistance R5 and the 6th resistance R6
Any point is the feedback end FB2 of the output voltage of BUCK circuits 246.One end of 7th resistance R7 is connected to BUCK circuits 246
The other end of output end, the 7th resistance R7 is connected with one end of the 8th resistance R8；The other end of 8th resistance R8 is connected to the ground
End.Feedback ends of any point SNS as voltage-regulating circuit between 7th resistance R7 and the 8th resistance R8；It is adjusted according to voltage
The feedback voltage of the feedback end of circuit adjusts the pwm signal that processing and control module 210 exports, and then adjusts the electricity of setting amplitude
Pressure.In this embodiment, the first metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, inductance L, third capacitance C3 constitute basic BUCK circuits 246,
The output voltage of BUCK circuits 246 carries out partial pressure feedback by the 5th resistance R5 and the 6th resistance R6, to make BUCK circuits 246
Output voltage be adjusted to a stationary value.The 7th resistance R7 and the 8th resistance R8 is designed, the 7th resistance R7 and the 8th is passed through
Resistance R8 partial pressures, to monitor the output voltage of BUCK circuits 246, feed back to processing and control module 210, are carried out to output voltage micro-
It adjusts, to reach practically necessary output voltage.
Battery module 206；Battery module 206, including：Protection module；Voltameter module, voltameter module are controlled with processing
Module 210 is connected, and voltameter module is for detecting cell voltage and battery current.Battery module 206 is usually lithium battery, electricity
Pond module 206 includes protection module and voltameter module, and protection module is used to carry out overvoltage or overcurrent to battery module 206
Protection, voltameter module are transferred to processing and control module 210 for detecting cell voltage and battery current, it is ensured that processing control
Molding block 210 accurately judges that the charging stage.
In this embodiment, BUCK circuits 246 are used to provide fine adjustable voltage to electric charge pump module, existing by logical
Believe that the Buck circuits of interface adjustment output voltage, the selection not met the requirements, the technical program use processing and control module 210
Or outside PWM generation modules control SS (soft start) to realize fine pressure regulation, there is an offset constant current source 400, output electricity at SS
Ib is flowed, error amplifier 402 is used for obtaining the value of feedback of BUCK circuits 246 output voltages and is provided by offset constant current source 400
The voltage difference (error) of the reference voltage of voltage or control driving circuit 244, and gain is exported to pulse width modulator 404,
Pulse width modulator 404 compared with the sawtooth wave that sawtooth wave output circuit generates, is generated by error amplifier 402 and is used for pulsewidth tune
The pwm pulse of system controls signal, and exports to logic controller 406, then drives BUCK circuits 246 by driving circuit 408
Metal-oxide-semiconductor closure and disconnection, so that the output end OUT of BUCK circuits 246 is exported a stable setting voltage.
As voltage VREFs (reference voltage) of the voltage VSS of SS more than or equal to REF, i.e. VSS≤VREF, OUT voltages
VOUT divides (at FB2) close loop negative feedback by R5, R6, and the error of voltage VFB and VREF at FB1 is made to be reduced to zero, i.e. at FB1
Voltage is equal with VREF, and the calculation equation of VOUT is at this time
By upper equation (1) it is found that VOUT is linear with VREF, VOUT is fixed nonadjustable.
When the voltage VSS of the first input end SS of control driving circuit 244 is less than the second input of control driving circuit 244
Hold the voltage VREF, i.e. VSS of REF<When VREF, the calculation equation of VOUT is at this time：
VSS is codetermined by the bias current sources inside the output voltage and SS of PWM, if the high level of PWM_IN is Vdd,
Duty ratio is D (duty ratio refers to the ratio of the time and a cycle time of high level), and the level of PWM passes through R1 and R2 points
Pressure carries out low-pass filtering by R3 and C1, and R4 and C2 are also considered as a RC filter circuit, at the same C2 may also function as it is certain soft
Startup acts on, and according to actual conditions, can also omit.According to circuit superposition theorem, there is equation：
So working as VSS<When VREF, have
By upper equation (4) it is found that R5, R6, R1, R2, R3, R4 setting are constant；Ib is also constant after chip is selected；
Vdd is the high level of PWM at PWM_IN, is also constant after designing；Then in equation (4) VOUT be one only with duty ratio D at
One function of linear relationship；As long as changing the duty ratio of PWM, the output valve of VOUT can be changed.In actual use, it designs
The corresponding VSS of VOUT adjustable voltage ranges is less than VREF.R7, R8 can be also designed simultaneously, is divided by R7, R8 to monitor
The output valve of VOUT feeds back to main control end and is finely adjusted, to reach practically necessary output voltage.
The embodiment of second aspect of the present invention, it is proposed that a kind of electronic equipment includes the charging circuit of any of the above-described.
Electronic equipment provided by the invention includes the charging circuit of any of the above-described, can realize such as any of the above-described
Whole advantageous effects of charging circuit.
The embodiment of third aspect present invention proposes a kind of wireless charging method, is used for the charging circuit of any of the above-described,
Fig. 5 shows the flow chart of the wireless charging method of one embodiment of the present of invention.Wherein, this method includes：
Step 402, the cell voltage and battery current of battery module are obtained；
Step 404, according to cell voltage, or according to cell voltage and battery current, to the first reduction voltage circuit and second
Reduction voltage circuit sends the first reduction voltage circuit of control and powers on and the first control signal of the second reduction voltage circuit power down, or control the
The second control signal that one reduction voltage circuit power down and the second reduction voltage circuit power on, to switch the first reduction voltage circuit and the second decompression
The power-up state of circuit.
Wireless charging method provided by the invention obtains the cell voltage and battery current of battery module, according to battery electricity
Pressure, or according to the power-up state of cell voltage and battery current the first reduction voltage circuit of switching and the second reduction voltage circuit, realize
Switch the first reduction voltage circuit or the second reduction voltage circuit is depressured the DC voltage of wireless receiving module, and then is supplied to battery
Module carries out wireless charging for battery module.Technical solution using the present invention uses corresponding drop in the different charging stages
Volt circuit can promote decompression transfer efficiency, avoid charging Wen Sheng higher, and then improve the wireless charging efficiency of battery.
Preferably, when cell voltage is less than first voltage threshold value, second control signal is sent, and then by the second decompression electricity
Road is depressured DC voltage；When cell voltage is more than or equal to first voltage threshold value or cell voltage equal to second voltage threshold value
And battery current sends first control signal, and then by the first reduction voltage circuit to direct current pressure drop when being more than or equal to current threshold
Pressure, wherein first voltage threshold value are less than second voltage threshold value；It is less than when cell voltage is equal to second voltage threshold value and battery current
When current threshold, second control signal is sent, and then be depressured to DC voltage by the second reduction voltage circuit.
In this embodiment, first voltage threshold value is less than second voltage threshold value, is less than first voltage threshold value in cell voltage
When, i.e., it before entering the constant current mode stage, controls the first reduction voltage circuit power down and the second reduction voltage circuit and powers on, and then by the
Two reduction voltage circuits are depressured DC voltage；Be more than or equal to first voltage threshold value in cell voltage, i.e., at the constant current mode stage, or
When person's cell voltage is equal to second voltage threshold value and battery current and is more than or equal to current threshold, i.e., in the high current rank of constant voltage mode
Section, the first reduction voltage circuit of control powers on and the second reduction voltage circuit power down, and then is depressured to DC voltage by the first reduction voltage circuit；
When cell voltage is equal to second voltage threshold value and battery current and is less than current threshold, i.e., in the low current stage of constant voltage mode,
It controls the first reduction voltage circuit power down and the second reduction voltage circuit powers on, and then DC voltage is depressured by the second reduction voltage circuit, energy
It is enough realize the high current stage of constant current mode and constant voltage mode use than the second reduction voltage circuit with high decompression transfer efficiency with
And the first reduction voltage circuit of the characteristics such as few fever is depressured, and decompression transfer efficiency is improved, and reduces battery module fever.
Preferably, when cell voltage is more than or equal to first voltage threshold value, the first reduction voltage circuit is calculated according to cell voltage
BUCK circuits required voltage, adjust pwm signal to adjust the output voltages of BUCK circuits to required voltage.
In this embodiment, it is more than or equal to first voltage threshold value in cell voltage, i.e., at the constant current mode stage, additionally it is possible to
The required voltage of the BUCK circuits of the first reduction voltage circuit is calculated according to cell voltage, adjusts pwm signal to adjust BUCK circuits
Output voltage provides fine adjustable voltage to required voltage, and then for electric charge pump module, it is ensured that electric charge pump module is to direct current
The antihypertensive effect of pressure, to realize the large current charge of battery module.
Preferably, when cell voltage is more than or equal to first voltage threshold value, according to the feedback of the output voltage of BUCK circuits
Value adjusts pwm signal to adjust the output voltages of BUCK circuits to required voltage.
In this embodiment, it is monitored that the value of feedback of the output voltage of BUCK circuits, is finely adjusted output voltage, to reach
To practically necessary output voltage.
Fig. 6 shows the flow chart of the wireless charging method of the specific embodiment of the present invention.Wherein, this method packet
It includes：
Step 502, detection cell voltage VBAT；
Step 504, judge whether VBAT<VBAT_LOW, VBAT_LOW are a low-voltage；
Step 506, work as VBAT<It when VBAT_LOW, that is, charges before the constant current mode stage, uses buck switch conversion
Circuit carries out decompression charging to battery；
Step 508, as VBAT≤VBAT_LOW, i.e. charging enters the constant current mode stage, closes buck switch conversion
Circuit calculates the required voltage of BUCK circuits according to VBAT；To set the duty ratio D values of corresponding PWM；
Step 510, it is fed back by the output voltage values of BUCK circuits, to carry out the fine tuning of PWM duty cycle D values, to reach
The practically necessary output voltage of BUCK circuits；
Step 512, it carries out the decompression in constant current mode stage to battery using electric charge pump module with setting electric current to charge, charging
In the process, with the raising of cell voltage, processing and control module is needed to adjust PWM duty cycle D values, to meet electric charge pump module
Required voltage maintains constant current mode charging；
Step 514, judge whether that VBAT is equal to VBAT_REG, VBAT_REG is a high voltage；
Step 516, when VBAT is equal to VBAT_REG, that is, after entering the constant voltage mode stage, it is continuing with electric charge pump module
Charging, battery charge can gradually reduce at this time, and voltameter detects battery current IBAT；
Step 518, judge whether IBAT<IBAT_T (IBAT_T is a threshold value, can be adjusted as the case may be, such as
1.5A or 2A etc.)；
Step 520, work as IBAT<When IBAT_T, electric charge pump module is closed, is continued using buck conversion switch
The constant voltage mode stage charges, until charging process terminates.
The technical program is mainly to control the output voltage of Buck circuits by controlling the duty ratio of PWM, is enhanced
The flexibility of Buck controls；By fine-tuning for Buck circuit output voltages, to meet electric charge pump module charging needs；Separately
Outside, it uses and can be charged with large current charge, the electric charge pump module that efficient, fever is small in the constant current mode stage；Consider constant pressure
The mode phases time is longer, and electric charge pump module charging is continuing with before the threshold value that battery charge drops to setting, is passed through
The voltameter of battery assists anti-locking system to be carried too early into constant voltage mode so that charging process is as far as possible with large current charge
High charge speed；Other situations are then charged using buck conversion switch, ensure the compatibility of charging safety and scheme.
In the description of this specification, term " first ", " second " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance, unless otherwise clearly defined and limited；Term " connection ", " installation ", " fixation " etc. should all be done extensively
Reason and good sense solution, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；It can be direct phase
It even, can also be indirectly connected through an intermediary.For the ordinary skill in the art, it can manage as the case may be
Solve the concrete meaning of above-mentioned term in the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the present invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of charging circuit, which is characterized in that including：
Wireless receiving module, the electric energy for receiving setting power supply transmitting, and export DC voltage；
The input terminal of first reduction voltage circuit, first reduction voltage circuit is connected with the output end of the wireless receiving module, institute
The output end for stating the first reduction voltage circuit is connected with the input terminal of battery module, for being depressured to the DC voltage；
The input terminal of second reduction voltage circuit, second reduction voltage circuit is connected with the output end of the wireless receiving module, institute
The output end for stating the second reduction voltage circuit is connected with the input terminal of the battery module, for being depressured to the DC voltage；
Processing and control module is depressured with the wireless receiving module, the control terminal of first reduction voltage circuit, described second respectively
The control terminal of circuit, the battery module output end be connected, for according to the cell voltage of the battery module, Huo Zhegen
Battery current according to the battery module and the cell voltage are sent out to first reduction voltage circuit and second reduction voltage circuit
Control first reduction voltage circuit is sent to power on and the first control signal of the second reduction voltage circuit power down, or described in control
The second control signal that first reduction voltage circuit power down and second reduction voltage circuit power on, to switch first reduction voltage circuit
With the power-up state of second reduction voltage circuit.
2. charging circuit according to claim 1, which is characterized in that
The processing and control module is specifically used for when the cell voltage is less than first voltage threshold value, sends second control
Signal processed, and then the DC voltage is depressured by second reduction voltage circuit；
The cell voltage be more than or equal to the first voltage threshold value or the cell voltage be equal to second voltage threshold value and
When the battery current is more than or equal to current threshold, the first control signal is sent, and then by first reduction voltage circuit pair
The DC voltage decompression, wherein the first voltage threshold value is less than the second voltage threshold value；
When the cell voltage is equal to the second voltage threshold value and the battery current is less than the current threshold, institute is sent
Second control signal is stated, and then the DC voltage is depressured by second reduction voltage circuit.
3. charging circuit according to claim 1, which is characterized in that
First reduction voltage circuit includes one or more converting branch in parallel, and each converting branch includes one
Or more than two voltage-regulating circuits and one or more concatenated electric charge pump module；Or first reduction voltage circuit
Including voltage-regulating circuit and one or more converting branch in parallel, each converting branch includes one or two
A above concatenated electric charge pump module；
For any voltage-regulating circuit, the output of the input terminal of the voltage-regulating circuit and the wireless receiving module
End is connected, and the output end of the voltage-regulating circuit is connected with the input terminal of the electric charge pump module, the voltage adjustment
The control terminal of circuit, the voltage-regulating circuit feedback end be connected with the processing and control module, for according to described in
The DC voltage is adjusted to the voltage of setting amplitude by the pwm signal of processing and control module output, and is exported to the charge
Pump module；
For any electric charge pump module, the input terminal of the output end of the electric charge pump module and other electric charge pump modules
Or the input terminal of the battery module is connected, the control terminal of the electric charge pump module is connected with the processing and control module,
It is depressured for the voltage to the setting amplitude, and by the voltage output of the setting amplitude after decompression to other described
Electric charge pump module or the battery module.
4. charging circuit according to claim 3, which is characterized in that the voltage-regulating circuit, including：
External pwm circuit, the control terminal of the input terminal of the external pwm circuit as the voltage-regulating circuit；
Driving circuit is controlled, the first input end of the control driving circuit is connected with the output end of the external pwm circuit,
Second input terminal of the control driving circuit is connected with the reference voltage output terminal of the control driving circuit, the control
The third input terminal of driving circuit is connected with the feedback end of the output voltage of the BUCK circuits of the voltage-regulating circuit；
The BUCK circuits, the switch control terminal of the BUCK circuits are connected with the output end of the control driving circuit；
When the voltage of the first input end of the control driving circuit is less than the electricity of the second input terminal of the control driving circuit
When pressure, the control driving circuit controls the first of driving circuit according to the third input terminal of the control driving circuit with described
The voltage difference of input terminal, the output voltage for controlling the BUCK circuits reach setting voltage, and the BUCK circuits is defeated at this time
Going out the input pwm signal of voltage and the external pwm circuit, there are linear relationships, and the setting is calculated according to the cell voltage
The voltage of amplitude, the input pwm signal by adjusting the external pwm circuit adjust the output voltages of the BUCK circuits to institute
State the voltage of setting amplitude.
5. charging circuit according to claim 4, which is characterized in that the external pwm circuit includes first resistor, second
Resistance, 3rd resistor, the first capacitance；
The first resistor, the 3rd resistor are sequentially connected, and the first resistor is also connected with the processing and control module,
The 3rd resistor is also connected with the first input end of the control driving circuit；
One end of first capacitance is connected between the 3rd resistor and the first input end of the control driving circuit, institute
The other end for stating the first capacitance is connected to ground terminal；
One end of the second resistance is connected between the first resistor and the 3rd resistor, the second resistance it is another
End is connected to the ground terminal.
6. charging circuit according to claim 5, which is characterized in that the external pwm circuit further includes：
One end of 4th resistance, the 4th resistance is connected between the 3rd resistor and first capacitance, and the described 4th
The other end of resistance is connected to the first input end of the control driving circuit；
Second capacitance, one end of second capacitance are connected to the first input of the 4th resistance and the control driving circuit
Between end, the other end of the second resistance is connected to the ground terminal.
7. charging circuit according to claim 5, which is characterized in that
The control driving circuit includes offset constant current source, error amplifier, pulse width modulator, sawtooth wave output circuit, logic
Controller, driving circuit；
The output end of the offset constant current source be connected to the 3rd resistor with it is described control driving circuit first input end it
Between；
The first input end of the error amplifier is the first input end of the control driving circuit, the error amplifier
Second input terminal is the second input terminal of the control driving circuit, and the third input terminal of the error amplifier is the control
The third input terminal of driving circuit；
The first input end of the pulse width modulator is connected with the output end of the error amplifier, the pulse width modulator
Second input terminal is connected with the output end of the sawtooth wave output circuit；
The input terminal of the logic controller is connected with the output end of the pulse width modulator, the output of the logic controller
End is connected with the input terminal of the driving circuit；
The output end of the driving circuit is connected with the switch control terminal of the BUCK circuits；
The sawtooth wave output circuit, including：
Saw-toothed wave generator, the output end of the saw-toothed wave generator are connected with the second input terminal of the pulse width modulator；
The input terminal of oscillator, the oscillator is connected with DC power supply, the output end of the oscillator and the sawtooth wave
The input terminal of generator is connected；
When the voltage of the first input end of the error amplifier is less than the voltage of the second input terminal of the error amplifier,
The output voltage of the error amplifier is the first defeated of third input terminal and the error amplifier of the error amplifier
The voltage difference for entering end, when the voltage of the first input end of the error amplifier is more than or equal to the second of the error amplifier
When the voltage of input terminal, the output voltage of the error amplifier is the third input terminal of the error amplifier and the error
The voltage difference of second input terminal of amplifier；
The sawtooth wave that the pulse width modulator generates the output voltage of the error amplifier and the sawtooth wave output circuit
It is compared, generates pulse control signal, the logic controller controls the driving circuit according to the pulse control signal
The BUCK circuits are driven, the output voltage of the BUCK circuits is made to reach the setting voltage.
8. charging circuit according to claim 7, which is characterized in that
The BUCK circuits include the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, inductance, third capacitance, the 5th resistance, the 6th resistance；
The grid of first metal-oxide-semiconductor is connected with the first output end of the driving circuit, and the drain electrode of first metal-oxide-semiconductor connects
It is connected to the output end of the wireless receiving module, the source electrode of first metal-oxide-semiconductor is connected with the drain electrode of second metal-oxide-semiconductor；
The grid of second metal-oxide-semiconductor is connected with the second output terminal of the driving circuit, and the source electrode of first metal-oxide-semiconductor connects
It is connected to ground terminal；
One end of the inductance is connected between the source electrode of first metal-oxide-semiconductor and the drain electrode of second metal-oxide-semiconductor, the inductance
The other end be connected to the output ends of the BUCK circuits；
One end of the third capacitance is connected to the output end of the BUCK circuits, and the other end of the third capacitance is connected to institute
State ground terminal；
One end of 5th resistance is connected to the output end of the BUCK circuits, the other end of the 5th resistance and described the
One end of six resistance is connected；
The other end of 6th resistance is connected to the ground terminal；
Any point between 5th resistance and the 6th resistance is the feedback end of the output voltage of the BUCK circuits.
9. charging circuit according to claim 8, which is characterized in that the BUCK circuits further include：
7th resistance, one end of the 7th resistance are connected to the output end of the BUCK circuits, the 7th resistance it is another
End is connected with one end of the 8th resistance；
The other end of 8th resistance, the 8th resistance is connected to the ground terminal；
Feedback end of any point as the voltage-regulating circuit between 7th resistance and the 8th resistance；
According to the feedback voltage of the feedback end of the voltage-regulating circuit, the pwm signal of the processing and control module output is adjusted,
And then adjust the voltage of the setting amplitude.
10. a kind of electronic equipment, which is characterized in that including：
Charging circuit as claimed in any one of claims 1-9 wherein.
11. a kind of wireless charging method, which is characterized in that it is used for charging circuit as claimed in any one of claims 1-9 wherein,
The method includes：
Obtain the cell voltage and battery current of battery module；
According to the cell voltage, or according to the cell voltage and the battery current, to the first reduction voltage circuit and second
Reduction voltage circuit transmission control first reduction voltage circuit powers on and the first control signal of the second reduction voltage circuit power down, or
The second control signal that person controls the first reduction voltage circuit power down and second reduction voltage circuit powers on, to switch described
The power-up state of one reduction voltage circuit and second reduction voltage circuit.
12. wireless charging method according to claim 11, which is characterized in that
When the cell voltage is less than first voltage threshold value, the second control signal is sent, and then be depressured by described second
Circuit is depressured DC voltage；
When the cell voltage be more than or equal to the first voltage threshold value or the cell voltage be equal to second voltage threshold value and
When the battery current is more than or equal to current threshold, the first control signal is sent, and then by first reduction voltage circuit pair
The DC voltage decompression, wherein the first voltage threshold value is less than the second voltage threshold value；
When the cell voltage is equal to the second voltage threshold value and the battery current is less than the current threshold, institute is sent
Second control signal is stated, and then the DC voltage is depressured by second reduction voltage circuit.
13. wireless charging method according to claim 12, which is characterized in that
When the cell voltage is more than or equal to the first voltage threshold value, first decompression is calculated according to the cell voltage
The required voltage of the BUCK circuits of circuit adjusts pwm signal to adjust the output voltages of the BUCK circuits to the required electricity
Pressure.
14. wireless charging method according to claim 13, which is characterized in that
When the cell voltage is more than or equal to the first voltage threshold value, according to the feedback of the output voltage of the BUCK circuits
Value adjusts the pwm signal to adjust the output voltages of the BUCK circuits to the required voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810623922.6A CN108718103A (en) | 2018-06-15 | 2018-06-15 | A kind of charging circuit, electronic equipment and wireless charging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810623922.6A CN108718103A (en) | 2018-06-15 | 2018-06-15 | A kind of charging circuit, electronic equipment and wireless charging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108718103A true CN108718103A (en) | 2018-10-30 |
Family
ID=63912170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810623922.6A Withdrawn CN108718103A (en) | 2018-06-15 | 2018-06-15 | A kind of charging circuit, electronic equipment and wireless charging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108718103A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152293A (en) * | 2020-09-28 | 2020-12-29 | 成都芯源***有限公司 | Battery current management system and related integrated circuit |
| CN112311101A (en) * | 2019-08-01 | 2021-02-02 | 北京小米移动软件有限公司 | Wireless power receiving equipment, wireless charging method and system |
| CN112821475A (en) * | 2019-11-15 | 2021-05-18 | 北京小米移动软件有限公司 | Charging circuit, charging control method and device |
| CN113131568A (en) * | 2021-03-30 | 2021-07-16 | 联想(北京)有限公司 | Wireless charging control method and circuit of battery |
| CN113541472A (en) * | 2020-04-13 | 2021-10-22 | ***通信集团终端有限公司 | Voltage reduction circuit and power supply chip |
| CN113708466A (en) * | 2021-10-25 | 2021-11-26 | 广东希荻微电子股份有限公司 | Battery charging and discharging circuit and terminal equipment |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574574A (en) * | 2003-05-22 | 2005-02-02 | 模拟微电子学股份有限公司 | Pulse width modulated charge pump |
| KR20090063129A (en) * | 2007-12-12 | 2009-06-17 | 마이크렐 인코포레이티드 | Constant on-time regulator with internal ripple generation and improved output voltage accuracy |
| CN102460926A (en) * | 2009-06-18 | 2012-05-16 | 得克萨斯***大学评议会 | System, method and apparatus for controlling converters using input-output linearization |
| CN102931842A (en) * | 2012-10-12 | 2013-02-13 | 华为技术有限公司 | Chip dynamic voltage regulating circuit and terminal equipment |
| CN103546031A (en) * | 2012-07-09 | 2014-01-29 | 晶豪科技股份有限公司 | Voltage converter with slow starting circuit |
| US20140176097A1 (en) * | 2012-12-24 | 2014-06-26 | Upi Semiconductor Corp. | Multi-phase dc-dc power converter |
| US20150326106A1 (en) * | 2014-05-06 | 2015-11-12 | Chengdu Monolithic Power Systems Co., Ltd. | Soft start circuit for switching converter and associated soft start method |
| CN105652949A (en) * | 2014-10-23 | 2016-06-08 | 智原科技股份有限公司 | Voltage regulator with soft start circuit |
| JP2017060383A (en) * | 2015-09-08 | 2017-03-23 | ローム株式会社 | Dc/dc converter and switching power supply device |
| CN106787055A (en) * | 2016-11-30 | 2017-05-31 | 珠海市魅族科技有限公司 | A kind of charging circuit, system, method and terminal |
| CN107947305A (en) * | 2017-12-01 | 2018-04-20 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and terminal device |
-
2018
- 2018-06-15 CN CN201810623922.6A patent/CN108718103A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574574A (en) * | 2003-05-22 | 2005-02-02 | 模拟微电子学股份有限公司 | Pulse width modulated charge pump |
| KR20090063129A (en) * | 2007-12-12 | 2009-06-17 | 마이크렐 인코포레이티드 | Constant on-time regulator with internal ripple generation and improved output voltage accuracy |
| CN102460926A (en) * | 2009-06-18 | 2012-05-16 | 得克萨斯***大学评议会 | System, method and apparatus for controlling converters using input-output linearization |
| CN103546031A (en) * | 2012-07-09 | 2014-01-29 | 晶豪科技股份有限公司 | Voltage converter with slow starting circuit |
| CN102931842A (en) * | 2012-10-12 | 2013-02-13 | 华为技术有限公司 | Chip dynamic voltage regulating circuit and terminal equipment |
| US20140176097A1 (en) * | 2012-12-24 | 2014-06-26 | Upi Semiconductor Corp. | Multi-phase dc-dc power converter |
| US20150326106A1 (en) * | 2014-05-06 | 2015-11-12 | Chengdu Monolithic Power Systems Co., Ltd. | Soft start circuit for switching converter and associated soft start method |
| CN105652949A (en) * | 2014-10-23 | 2016-06-08 | 智原科技股份有限公司 | Voltage regulator with soft start circuit |
| JP2017060383A (en) * | 2015-09-08 | 2017-03-23 | ローム株式会社 | Dc/dc converter and switching power supply device |
| CN106787055A (en) * | 2016-11-30 | 2017-05-31 | 珠海市魅族科技有限公司 | A kind of charging circuit, system, method and terminal |
| CN107947305A (en) * | 2017-12-01 | 2018-04-20 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and terminal device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311101A (en) * | 2019-08-01 | 2021-02-02 | 北京小米移动软件有限公司 | Wireless power receiving equipment, wireless charging method and system |
| US11557920B2 (en) | 2019-08-01 | 2023-01-17 | Beijing Xiaomi Mobile Software Co., Ltd. | Wireless power receiving device, wireless charging method and system |
| CN112821475A (en) * | 2019-11-15 | 2021-05-18 | 北京小米移动软件有限公司 | Charging circuit, charging control method and device |
| CN112821475B (en) * | 2019-11-15 | 2024-04-02 | 北京小米移动软件有限公司 | Charging circuit, charging control method and device |
| CN113541472A (en) * | 2020-04-13 | 2021-10-22 | ***通信集团终端有限公司 | Voltage reduction circuit and power supply chip |
| CN112152293A (en) * | 2020-09-28 | 2020-12-29 | 成都芯源***有限公司 | Battery current management system and related integrated circuit |
| CN112152293B (en) * | 2020-09-28 | 2022-07-26 | 成都芯源***有限公司 | Battery current management system and related integrated circuit |
| CN113131568A (en) * | 2021-03-30 | 2021-07-16 | 联想(北京)有限公司 | Wireless charging control method and circuit of battery |
| CN113708466A (en) * | 2021-10-25 | 2021-11-26 | 广东希荻微电子股份有限公司 | Battery charging and discharging circuit and terminal equipment |
| US11424629B1 (en) | 2021-10-25 | 2022-08-23 | Halo Microelectronics Co., Ltd. | Battery charging and discharging circuit and terminal devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108718103A (en) | A kind of charging circuit, electronic equipment and wireless charging method | |
| CN207218340U (en) | A kind of switching mode constant current constant voltage lithium battery charger | |
| CN106357110B (en) | A kind of BUCK constant voltage drive circuits and BUCK constant-voltage drivers | |
| CN106464135B (en) | Power switched grade and method for controlling the power switched grade | |
| CN105515382B (en) | A kind of controlling circuit of voltage regulation of wireless power supply system | |
| CN106716805B (en) | Switching power grade and method for controlling switching power grade | |
| KR102471450B1 (en) | Charging method and charging device | |
| CN101478234A (en) | Switching capacitor type DC-DC converter | |
| CN104991597A (en) | Peak current control circuit | |
| CN104467117B (en) | Charging method, device and charger | |
| CN102468747A (en) | Charge pump control circuit | |
| US20230208287A1 (en) | Dc/dc converter, voltage gain switching method and system | |
| CN208369264U (en) | A kind of charging circuit and electronic equipment | |
| CN105337502B (en) | Low-power consumption circuit energy acquisition circuit | |
| CN107634565A (en) | A kind of wireless charging circuit of lithium battery | |
| CN105932875B (en) | A kind of outer synchronous DC/DC converter of adaptive band PLL latch function | |
| CN104102258A (en) | Circuit in electronic equipment, electronic equipment and method for supplying power for battery of electronic equipment | |
| CN106685193B (en) | High pressure LDO circuit based on charge pump | |
| CN204615628U (en) | Multistage negative pressure generating circuit | |
| CN103701421A (en) | Volume regulating device, volume regulating method and electronic equipment | |
| CN207518358U (en) | A kind of charging circuit, electronic equipment and wireless charging system | |
| CN103346597B (en) | Charging device | |
| CN206274644U (en) | The oscillator and inductance converter used with reference to inductance converter | |
| CN208423854U (en) | A kind of mobile power source and its discharge circuit | |
| CN105337496B (en) | Pulse frequency modulation circuit based on voltage controlled oscillator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181030 |
|
| WW01 | Invention patent application withdrawn after publication |