CN105743185A - Mobile terminal and charging method - Google Patents
Mobile terminal and charging method Download PDFInfo
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- CN105743185A CN105743185A CN201610279148.2A CN201610279148A CN105743185A CN 105743185 A CN105743185 A CN 105743185A CN 201610279148 A CN201610279148 A CN 201610279148A CN 105743185 A CN105743185 A CN 105743185A
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- battery
- charging
- charged
- charging chip
- ldo circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a mobile terminal and a charging method, and relates to the technical field of communication. A battery is charged jointly by an LDO (low dropout regulator) circuit and a charging chip, so that the purpose of rapid charging is fulfilled. The mobile terminal comprises a processor, the charging chip, the LDO circuit and a battery, wherein the charging chip is used for charging the battery until the battery is fully charged; the processor is used for controlling the LDO circuit to charge the battery when the battery voltage is within a first voltage interval in the charging process of the battery by the charging chip; and the LDO circuit is used for charging the battery under the control of the processor.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of mobile terminal and charging method.
Background technology
Progress along with hyundai electronics science and technology, the portable type electronic products such as mobile phone, panel computer, digital camera achieve quick development, these portable electric appts are also more and more higher to the requirement of battery in equipment, it is increasing that these requirements are mainly reflected in battery capacity, and the charging interval that terminal client requires is shorter and shorter.
For meeting the requirement of terminal client, at present, industry generally adopts following double; two charging chips to carry out battery charging: arrange two charging chips of parallel connection in terminal, one as main charging chip, another is as auxiliary charging chip, and two charging chips all pass through 2 wire type universal serial bus (Inter-IntegratedCircuit, I2C) interfaces and are connected with processor, controller it is controlled.In battery charging process, main charging chip charges for battery always, processor needs the charging stage according to battery to control the opening and closing of auxiliary charging chip, so that auxiliary charging chip charges for battery together with main charging chip, accelerate battery charge time, and when auxiliary charging chip is battery charging, it is necessary to controller constantly adjusts the charging current of auxiliary charging chip by I2C interface, in order to avoid battery charge is much causes unnecessary injury to battery.
Summary of the invention
The main purpose of the present invention, is in that to provide a kind of mobile terminal and charging method, jointly battery is charged by LDO circuit and charging chip, to realize the purpose of quick charge.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
First aspect, the embodiment of the present invention provides a kind of mobile terminal, and described mobile terminal may include that processor, charging chip, low pressure difference linear voltage regulator LDO circuit and battery；The outfan of charging chip is connected with the positive pole of battery, and the communication interface of charging chip is connected with processor；The outfan of LDO circuit is connected with the positive pole of battery, and the control end of LDO circuit is connected with processor；
Charging chip, for battery is charged, until battery charging complete；
Processor, in the process that battery is charged by charging chip, if cell voltage is in the first voltage range, then controls LDO circuit and battery is charged；
LDO circuit, for being charged battery under the control of a processor.
Second aspect, the embodiment of the present invention also provides for a kind of charging method, is applied to mobile terminal as described in relation to the first aspect, and described method may include that
Battery is charged by charging chip, until battery charging complete；
In the process that battery is charged by charging chip, if cell voltage is in the first voltage range, then battery is charged by controller control LDO circuit.
As from the foregoing, the embodiment of the present invention provides a kind of mobile terminal and charging method, this mobile terminal may include that processor, charging chip, low pressure difference linear voltage regulator LDO circuit and battery, charging chip, for battery is charged, until battery charging complete, processor, for in the process that battery is charged by charging chip, if cell voltage is in the first voltage range, then controls LDO circuit and battery is charged.
So, LDO circuit is set up in mobile terminal, it is made battery to be charged together with charging chip in certain stage of battery charging, due to, the electric current of both LDO circuit and charging chip output jointly is more than the output electric current of single charging chip, therefore, the combination of LDO circuit and charging chip can well realize the quick charge to battery.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the theory diagram of existing LDO circuit；
Fig. 2 is the output characteristic curve figure of existing LDO electric current；
The structural representation of the mobile terminal 10 that Fig. 3 provides for the embodiment of the present invention；
The schematic flow sheet of a kind of charging method that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
In describing the invention, it will be appreciated that, the system of the instruction such as term " first ", " second ", " another " or element are the system with certain function based on embodiment description or element, it is for only for ease of the description present invention and simplifies description, rather than the system of instruction or hint indication or element must have this to name, therefore it is not considered as limiting the invention.
Before detailed description this programme, for the ease of understanding technical solutions according to the invention, the technical term that the present invention relates to is explained in detail, it will be appreciated that, following technical term is only the description that invention technician carries out for convenience, do not represent or system or the element of hint indication must have this to name, be therefore not considered as limiting the invention:
LDO (LowDropoutRegulator, low pressure difference linear voltage regulator) circuit, its basic functional principle is as shown in Figure 1, LDO circuit mainly has: series connection adjusts pipe VT, sample resistance R1, resistance R2, comparison amplifier A composition, sampling voltage is added in the in-phase input end of comparison amplifier A, compared with the reference voltage (Uref) being added in inverting input, both differences are after the amplification of comparison amplifier A, control series connection and adjust the pressure drop of pipe VT, thus regulated output voltage.Optionally, in embodiments of the present invention, LDO circuit can be: has output current limiting and the circuit of reverse protection characteristic.
nullSuch as，Fig. 2 is the output characteristic curve figure of LDO circuit，In the process that LDO circuit is load supplying，If the output electric current of load request LDO circuit is not less than rated current，Then LDO circuit is in pressure constant state (in Fig. 2 A point to the curve between B point)，If the output flow process of load request LDO circuit exceedes rated current，Then LDO circuit is in current limliting duty (in Fig. 2 B point to the curve between C point)，In current limliting duty，Load voltage gradually rises，The output voltage of LDO circuit can be stepped up，The output electric current of LDO circuit also can become big (but not over rated current)，And the output electric current of load request LDO circuit is gradually lowered，Now，If the fan-out capability of load request LDO circuit is not less than rated current，Then LDO circuit can become not limited current state，It is in pressure constant state，The output electric current of LDO circuit can diminish.
Lithium cell charging, its charging process can be generally divided into four-stage: trickle charge (low pressure preliminary filling), constant-current charge, constant-voltage charge and charging termination, such as, can first detect the voltage of battery to be charged, if voltage relatively low (as lower than 3V), want advanced line precharge, charging current is set electric current 1/10, after voltage is raised to 3V, enter standard charging process, standard charging process is: carry out constant-current charge setting electric current, when cell voltage is raised to 4.20V, change constant-voltage charge into, maintenance charging voltage is 4.20V, now, charging current is gradually reduced, when electric current drops to set charging current 1/10, charging terminates.
By the process of lithium cell charging it can be seen that at constant-current charging phase, it is possible to strengthen charging current, so that when cell voltage is quickly ramped up to 4.20V, changing constant-voltage charge into, until charging terminates, so just can reduce the charging interval, it is achieved quick charge.Based on this, the present invention, at constant-current charging phase, adopts LDO circuit and charging chip jointly battery to be charged, to improve charging rate.
The structure chart of the mobile terminal 10 that Fig. 3 provides for the embodiment of the present invention, described mobile terminal 10 can be the equipment such as mobile phone, panel computer, as it is shown on figure 3, described mobile terminal 10 may include that processor 101, charging chip 102, LDO circuit 103 and battery 104；The outfan of described charging chip 102 is connected with the positive pole of described battery 104, and the communication interface of described charging chip 102 is connected with described processor 101；The outfan of described LDO circuit 103 is connected with the positive pole of described battery 104, and the control end of described LDO circuit 103 is connected with described processor 101.
Wherein, processor 101 can be: a central processing unit (centralprocessingunit, referred to as CPU), can also be specific integrated circuit (ApplicationSpecificIntegratedCircuit, ASIC), or it is configured to implement one or more integrated circuits of the embodiment of the present invention, such as: one or more microprocessor (digitalsingnalprocessor, DSP), or, one or more field programmable gate array (FieldProgrammableGateArray, FPGA).
Charging chip 102, it is possible to for switching mode charging chip, battery is charged and manages by major function exactly.
LDO circuit 103, it is possible to for LDO circuit as described in Figure 1.
Battery 104, it is possible to for lithium battery.
Concrete, in embodiments of the present invention, charging chip 102, it is possible to for battery is charged, until battery charging complete；
Processor 101, it is possible to in the process that battery is charged by charging chip, if cell voltage is in the first voltage range, then control LDO circuit and battery be charged；
LDO circuit, for being charged battery under the control of a processor.
So, it is possible in mobile terminal, set up LDO circuit, LDO circuit is made together with charging chip, battery to be charged, it is achieved the quick charge to battery.
Optionally, first voltage range can be: from the first preset voltage value to the voltage range of the second preset voltage value, second preset voltage value is more than the first preset voltage value, and first the concrete value of preset voltage value and the second preset voltage value can be configured as required, this is not defined by the embodiment of the present invention.
Processor 101, specifically may be used for, when processor 101 detects that battery 104 starts to charge up, sending charging instruction to charging chip 102, and charging instruction is used for notifying that charging chip 102 starts battery 104 is charged；
Charging chip 102, specifically may be used for the voltage of the charging instruction according to processor 101 transmission and battery 104, starts battery 104 is charged；
If battery 104 voltage reaches the first preset voltage value, then LDO circuit 103 opened by processor 101, LDO circuit 103 and charging chip 102 jointly charge for battery 104；
If battery 104 voltage reaches the second preset voltage value, then processor 101 cuts out LDO circuit 103, only by charging chip 102, battery is charged, until battery 104 charging complete.
Optionally, the voltage of the battery 104 detected can be stored in charging chip 102 by charging chip 102, processor 101 read the voltage of the battery 104 of storage in charging chip 102, control being turned on and off of LDO circuit 103 according to the magnitude of voltage read.
It should be noted that in embodiments of the present invention, charging chip 102 specifically may be used for adopting following proposal one or scheme two that battery 104 is charged:
Scheme one:
If cell voltage is less than the first preset voltage value, then adopt trickle charge mode that battery 104 is charged；If cell voltage reaches the first preset voltage value, then adopt constant-current charge mode that battery 104 is charged, and in the constant-current charge process of charging chip 102, the maximum current value that the output electric current of charging chip 102 and the output electric current sum of LDO circuit 103 are born less than battery 104；If cell voltage reaches the second preset voltage value, then adopt constant voltage charging method that battery 104 is charged, until battery charging complete.
Scheme two:
If cell voltage is less than the first preset voltage value, then adopt trickle charge mode that battery 104 is charged；If cell voltage reaches the first preset voltage value, then adopt variable current that battery 104 is charged, and in the process that charging chip 102 adopts variable current to charge, the output electric current of charging chip 102 and the output electric current sum of LDO circuit 103 can be constant current, the maximum current value that constant current bears less than battery 104；If cell voltage reaches the second preset voltage value, then adopt constant voltage charging method that battery 104 is charged, until battery charging complete.
Further alternative, as it is shown on figure 3, described mobile terminal 10 can also include: charging inlet 105；One end of charging inlet 105 may be used for being connected with charger, and the other end of described charging inlet 105 may be used for being connected with the input of the input of described charging chip 102, LDO circuit 103；
Described processor 101, specifically may be used for when processor 101 detects that charger inserts charging inlet 105, it is determined that battery 104 starts to charge up, and sends charging instruction to charging chip 102.
Further alternative, described processor 101 can pass through 2 wire type universal serial bus (Inter-IntegratedCircuit, I2C) and be connected with the communication interface of described charging chip 102；Described processor 101 can pass through universal input/output (GeneralPurposeInputOutput, GPIO) bus and be connected with the control end of described LDO circuit 103.
Further alternative, when battery 104 being charged in order to avoid LDO circuit 103 and charging chip 102 simultaneously, the excessive harm that battery 104 is caused of electric current, in embodiments of the present invention, the output electric current of the outfan of described LDO circuit 103 may not exceed the rated current of described LDO circuit；In addition; owing to gradually reducing along with the pressure reduction between the rated output voltage of LDO circuit 103 and battery 104 voltage; the output electric current of LDO circuit 103 gradually reduces to zero; now; in order to avoid the electric current adverse current in battery 104 is entered in LDO circuit 103; described LDO circuit 103 is also provided with reverse protection module, and described reverse protection module may be used for avoiding the outfan of described LDO circuit to absorb the electric current flowed out from described battery.
Further alternative, as it is shown on figure 3, described mobile terminal 10 can also include: be arranged on the resistance between outfan and the positive pole of described battery 104 of described charging chip 102；
Described charging chip 102 can be also used for: detects the voltage on described resistance both sides, if the voltage on described resistance both sides is more than the 3rd predetermined threshold value, then closes the charge tunnel of described charging chip 102.
Wherein, 3rd predetermined threshold value can be configured as required, this is not defined by the embodiment of the present invention, when the voltage on resistance both sides is more than the 3rd predetermined threshold value, then represent that the charging current to battery 104 is excessive, it is likely that charging chip 102 is internal to go wrong, in order to avoid the injury to battery 104, the then charge tunnel of charge closing chip 102, stops charging.
Wherein, described resistance can be 10 milliohm precision resistances.
It should be noted that in order to improve the stability of each device in mobile terminal 10, each device described in Fig. 3 all can be welded on printed circuit (PCB) plate.
Below based on Fig. 3, the execution function of each unit in mobile terminal is described in detail:
Before battery 104 charging starts, LDO circuit 103 acquiescence is closed；
When processor 101 has detected that charger inserts charging inlet 105, send charging instruction to charging chip 102；
Charging chip 102 reads battery 104 voltage; if battery 104 voltage the first predetermined threshold value Vth1 (may be configured as 3V in this example) below time; it is not turned on LDO circuit 103; charging chip 102 is only used to charge to battery 104; in order to protect battery 104 in this example; when battery 104 voltage is lower than Vth1, charging chip 102 adopts trickle charge pattern to charge to battery 104, and charging current is limited in less than 200 milliamperes；
When battery 104 voltage is increased to more than Vth1, processor 101 opens LDO circuit 103 by enabling the control end of LDO circuit 103, charged to together with charging chip 102 battery 104 by LDO circuit 103, now, owing to now battery 104 voltage is relatively low, LDO circuit is in normal operating conditions, it is bigger that the output voltage of LDO circuit deducts cell voltage pressure reduction, after path resistance, the output electric current of LDO circuit can exceed greatly the fan-out capability of LDO circuit, so LDO circuit is in current limliting duty (now the output electric current of LDO circuit 103 can at about 300～500 milliamperes), charging circuit plus charging chip 102, the charging current now giving battery 104 is pacified between (A)～2A 1.8；
When battery 104 voltage is stepped up, the output electric current of LDO circuit 103 is also stepped up, output electric current also can incrementally increase, until arriving maximum output current (the i.e. output-current rating of LDO circuit 103, this example may be configured as 500 milliamperes), now, the voltage V1 according to the known battery 104 of following formula is:
V1=VLDO_out-(ILDO_rate+Ichgic)×(Rboard1+R1)-ILDO_rate×Rboard2
Wherein, VLDO_outFor the rated output voltage (may be configured as 4 volts (V) in this example) of LDO circuit 103, ILDO_rateFor the output-current rating of LDO circuit 103, Rboard1For the pcb board cabling equiva lent impedance between Fig. 1 interior joint 1 and node 2, Rboard2For the pcb board lead-in wire equiva lent impedance from the output node of LDO circuit 103 to Fig. 1 interior joint 1, R1 is the resistance value of resistance；
Rising along with cell voltage, after battery 104 voltage is more than V1, owing to the pressure reduction between rated output voltage and battery 104 voltage of LDO circuit 103 gradually reduces, the rated output voltage of LDO deducts cell voltage, again divided by after path resistance, the current value obtained is less than after the specified fan-out capability of LDO, LDO can become not limited current state, now the output voltage of LDO becomes steady state value, so along with cell voltage rises, the output voltage of LDO is more and more less with the difference of cell voltage, so the output electric current of LDO also can gradually reduce, when the output electric current of LDO circuit 103 is substantially near 0 MAH, now, Vth2 is arrived according to following formula known battery 104 voltage:
Vth2=VLDO_out-Ichgic×(Rboard1+R1)
At this point it is possible to closedown LDO circuit, charging chip is only used to charge the battery, until charging complete.
As from the foregoing, the embodiment of the present invention provides a kind of mobile terminal, including: processor, charging chip, low pressure difference linear voltage regulator LDO circuit and battery, when processor detects that battery starts to charge up, charging instruction is sent to charging chip, by charging chip, battery is charged, if the voltage of battery reaches the first predetermined threshold value, control LDO circuit to open, can be charged by battery together with charging chip by LDO circuit, when the voltage of battery reaches the second predetermined threshold value, close LDO circuit, only have charging chip battery is charged, until charging complete.
So, LDO circuit is set up in mobile terminal, it is made battery to be charged together with charging chip in certain stage of battery charging, due to, the electric current of both LDO circuit and charging chip output jointly is more than the output electric current of single charging chip, therefore, the combination of LDO circuit and charging chip can well realize the quick charge to battery.
Secondly as LDO circuit is cheap, its price is lower than the price of the auxiliary charging chip increased in prior art, so, compared with prior art, this case adopt LDO circuit and charging chip realize quick charge, it is possible to be substantially reduced the production cost of mobile terminal.Finally, owing to LDO circuit can according to the circuit characteristic of self, well control its output electric current and voltage, so, in the process that battery is charged by LDO circuit, processor need not go to adjust its output electric current, it is only necessary to controls it and is turned on and off, need with processor in existing scheme constantly to go to adjust compared with the output electric current of auxiliary charging chip, it is possible to be substantially reduced the control complexity of processor.
For the ease of describing, illustrate and describe the charging process of above-mentioned mobile terminal below with the form of step, although illustrate logical order in the drawings, but in some cases, it is possible to perform shown or described step with the order being different from herein.
The schematic flow sheet of the charging method that Fig. 4 provides for the embodiment of the present invention, this charging method is applied to the mobile terminal shown in Fig. 3, and as shown in Figure 4, described method may include that
S101: battery is charged by charging chip, until battery charging complete.
S102: in the process that battery is charged by charging chip, if cell voltage is in the first voltage range, then battery is charged by controller control LDO circuit.
So, it is possible to make LDO circuit together with charging chip, battery be charged, it is achieved the quick charge to battery.
Wherein, described first voltage range can be: from the first preset voltage value to the voltage range of the second preset voltage value, and described second preset voltage value is more than described first preset voltage value.
Concrete, before described battery is charged by described charging chip, described method can also include:
If processor detects that battery starts to charge up, then processor sends charging instruction to charging chip, and charging instruction is used for notifying that charging chip starts battery is charged；
Battery is charged including by charging chip:
Charging instruction that charging chip sends according to processor and the voltage of battery, charge to battery, until battery charging complete；
Controller controls LDO circuit and is charged including to battery:
If cell voltage reaches the first preset voltage value, then open LDO circuit；
If cell voltage reaches the second preset voltage value, then close LDO circuit.
Concrete, in embodiments of the present invention, charging chip can adopt following proposal one or scheme two that battery is charged:
Scheme one:
If cell voltage is less than the first preset voltage value, then adopt trickle charge mode that battery is charged；If cell voltage reaches the first preset voltage value, then adopt constant-current charge mode that battery is charged, and in the constant-current charge process of charging chip, the maximum current value that the output electric current of charging chip and the output electric current sum of LDO circuit are born less than battery；If cell voltage reaches the second preset voltage value, then adopt constant voltage charging method that battery is charged, until battery charging complete.
Scheme two:
If cell voltage is less than the first preset voltage value, then adopt trickle charge mode that battery is charged；If cell voltage reaches the first preset voltage value, then adopt variable current that battery is charged, and adopt in the process of variable current charging at charging chip, the output electric current of charging chip and the output electric current sum of LDO circuit can be constant current, the maximum current value that constant current bears less than battery；If cell voltage reaches the second preset voltage value, then adopt constant voltage charging method that battery is charged, until battery charging complete.
Further optional, mobile terminal can also include: charging inlet；One end of charging inlet is connected with the input of described charging chip, and the other end of described charging inlet is connected with the input of described LDO circuit；
When processor detects that charger inserts charging inlet, processor sends charging instruction to described charging chip.
Further alternative, described mobile terminal can also include: is arranged on the resistance between the outfan of described charging chip and the positive pole of described battery；Described charging method can also include:
Described charging chip detects the voltage on described resistance both sides, if the voltage on described resistance both sides is more than the 3rd predetermined threshold value, then and the charge tunnel of charge closing chip, stop battery being charged.
Wherein, described 3rd predetermined threshold value can be configured as required, and this is not defined by the embodiment of the present invention.
As from the foregoing, the embodiment of the present invention provides a kind of charging method, by charging chip, described battery is charged, until described battery charging complete, and in the process that described battery is charged by described charging chip, if described cell voltage is in the first voltage range, then described battery is charged by the described LDO circuit of described controller control.So, battery is charged together with charging chip by LDO circuit, due to, LDO circuit and the electric current of common output both charging chip are more than the output electric current of single charging chip, therefore, the combination of LDO circuit and charging chip can well realize the quick charge to battery.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (15)
1. a mobile terminal, it is characterised in that including: processor, charging chip, low pressure difference linear voltage regulator LDO circuit and battery；The outfan of described charging chip is connected with the positive pole of described battery, and the communication interface of described charging chip is connected with described processor；The outfan of described LDO circuit is connected with the positive pole of described battery, and the control end of described LDO circuit is connected with described processor；
Described charging chip, for described battery is charged, until described battery charging complete；
Described processor, for, in the process that described battery is charged by described charging chip, if described cell voltage is in the first voltage range, then controlling described LDO circuit and described battery be charged；
Described LDO circuit, for being charged described battery under the control of described processor.
2. mobile terminal according to claim 1, it is characterized in that, described first voltage range is: from the first preset voltage value to the voltage range of the second preset voltage value, and described second preset voltage value is more than described first preset voltage value, and described processor is used for:
When described processor detects that described battery starts to charge up, sending charging instruction to described charging chip, described charging instruction is used for notifying that described charging chip starts described battery is charged；
If described cell voltage reaches the first preset voltage value, then open described LDO circuit；
If described cell voltage reaches the second preset voltage value, then close described LDO circuit；
Described charging chip, specifically for the charging instruction sent according to described processor and described cell voltage, starts described battery is charged.
3. mobile terminal according to claim 2, it is characterised in that described charging chip is used for:
If described cell voltage is less than described first preset voltage value, then adopt trickle charge mode that described battery is charged；
If described cell voltage reaches described first preset voltage value, then adopt constant-current charge mode that described battery is charged, and in the charging process of described charging chip, the maximum current value that the output electric current of described charging chip and the output electric current sum of described LDO circuit are born less than described battery；
If described cell voltage reaches described second preset voltage value, then adopt constant voltage charging method that described battery is charged, until described battery charging complete.
4. mobile terminal according to claim 2, it is characterised in that described charging chip is used for:
If described cell voltage is less than described first preset voltage value, then adopt trickle charge mode that described battery is charged；
If described cell voltage reaches described first preset voltage value, then adopt variable current that described battery is charged, and in the charging process of described charging chip, the output electric current of described charging chip and the output electric current sum of described LDO circuit are constant current, the maximum current value that described constant current bears less than described battery；
If described cell voltage reaches described second preset voltage value, then adopt constant voltage charging method that described battery is charged, until described battery charging complete.
5. the mobile terminal according to claim 3 or 4, it is characterised in that described mobile terminal also includes: charging inlet；One end of described charging inlet is for being connected with charger, and the other end of described charging inlet is for being connected with the input of the input of described charging chip and described LDO circuit；
Described processor, specifically for when described processor detects that charger inserts described charging inlet, sending charging instruction to described charging chip.
6. the mobile terminal according to any one of claim 1-5, it is characterised in that
Described processor is connected with the communication interface of described charging chip by 2 wire type universal serial bus I2C；
Described processor is connected with the control end of described LDO circuit by universal input/output bus GPIO.
7. mobile terminal according to claim 1, it is characterised in that
The output electric current of the outfan of described LDO circuit is less than the rated current of described LDO circuit.
8. mobile terminal according to claim 1, it is characterised in that
Described LDO circuit is provided with reverse protection module, and described reverse protection module absorbs, for avoiding the outfan of described LDO circuit, the electric current flowed out from described battery.
9. mobile terminal according to claim 1, it is characterised in that described mobile terminal also includes: be arranged on the resistance between the outfan of described charging chip and the positive pole of described battery；
Described charging chip, is additionally operable to detect the voltage on described resistance both sides, if the voltage on described resistance both sides is more than the 3rd predetermined threshold value, then stops described battery is charged.
10. a charging method, it is characterised in that being applied to mobile terminal, described mobile terminal includes: processor, charging chip, low pressure difference linear voltage regulator LDO circuit and battery；The outfan of described charging chip is connected with the positive pole of described battery, and the communication interface of described charging chip is connected with described processor；The outfan of described LDO circuit is connected with the positive pole of described battery, and the control end of described LDO circuit is connected with described processor；Described charging method includes:
Described battery is charged by described charging chip, until described battery charging complete；
In the process that described battery is charged by described charging chip, if described cell voltage is in the first voltage range, then described battery is charged by the described LDO circuit of described controller control.
11. method according to claim 10, it is characterized in that, described first voltage range is: from the first preset voltage value to the voltage range of the second preset voltage value, described second preset voltage value is more than described first preset voltage value, before described battery is charged by described charging chip, described method also includes:
If described processor detects that described battery starts to charge up, then described processor sends charging instruction to described charging chip, and described charging instruction is used for notifying that described charging chip starts described battery is charged；
Described battery is charged including by described charging chip:
Charging instruction that described charging chip sends according to described processor and the voltage of described battery, charge to described battery, until described battery charging complete；
Described controller controls described LDO circuit and is charged including to described battery:
If described cell voltage reaches the first preset voltage value, then open described LDO circuit；
If described cell voltage reaches the second preset voltage value, then close described LDO circuit.
12. method according to claim 11, it is characterised in that charging instruction that described charging chip sends according to described processor and the voltage of described battery, described battery is charged, including:
If described cell voltage is less than described first preset voltage value, then adopt trickle charge mode that described battery is charged；
If described cell voltage reaches described first preset voltage value, then adopt constant-current charge mode that described battery is charged, and in the charging process of described charging chip, the maximum current value that the output electric current of described charging chip and the output electric current sum of described LDO circuit are born less than described battery；
If described cell voltage reaches described second preset voltage value, then adopt constant voltage charging method that described battery is charged, until described battery charging complete.
13. method according to claim 11, it is characterised in that charging instruction that described charging chip sends according to described processor and the voltage of described battery, described battery is charged, including:
If described cell voltage is less than described first preset voltage value, then adopt trickle charge mode that described battery is charged；
If described cell voltage reaches described first preset voltage value, then adopt variable current that described battery is charged, and in the charging process of described charging chip, the output electric current of described charging chip and the output electric current sum of described LDO circuit are constant current, the maximum current value that described constant current bears less than described battery；
If described cell voltage reaches described second preset voltage value, then adopt constant voltage charging method that described battery is charged, until described battery charging complete.
14. the method according to claim 12 or 13, it is characterised in that described mobile terminal also includes: charging inlet；One end of described charging inlet is for being connected with charger, and the other end of described charging inlet is for being connected with the input of the input of described charging chip and described LDO circuit；Described processor detects that described battery starts to charge up and includes:
When described processor detects that charger inserts described charging inlet, it is determined that described battery starts to charge up.
15. method according to claim 10, it is characterised in that described mobile terminal also includes: be arranged on the resistance between the outfan of described charging chip and the positive pole of described battery；Described charging method also includes:
Described charging chip detects the voltage on described resistance both sides；
If the voltage on described resistance both sides is more than the 3rd predetermined threshold value, then described charging chip stops described battery is charged.
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| CN106385079A (en) * | 2016-11-08 | 2017-02-08 | 惠州Tcl移动通信有限公司 | Charging current control method and charging current control system based on mobile terminal |
| CN106602655A (en) * | 2016-12-28 | 2017-04-26 | 深圳天珑无线科技有限公司 | Charging method and charging circuit of mobile terminal |
| CN106786915A (en) * | 2016-12-28 | 2017-05-31 | 深圳天珑无线科技有限公司 | The charging method and charging circuit of a kind of mobile terminal |
| CN107689647A (en) * | 2016-08-05 | 2018-02-13 | 纬创资通股份有限公司 | Charging circuit and electronic device |
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| CN105743185B (en) | 2019-01-22 |
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