CN109347161A - A kind of control method of on-state charging circuit, control circuit and on-state charging circuit - Google Patents
A kind of control method of on-state charging circuit, control circuit and on-state charging circuit Download PDFInfo
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- CN109347161A CN109347161A CN201811266160.5A CN201811266160A CN109347161A CN 109347161 A CN109347161 A CN 109347161A CN 201811266160 A CN201811266160 A CN 201811266160A CN 109347161 A CN109347161 A CN 109347161A
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of control methods of on-state charging circuit, control circuit and on-state charging circuit, on-state charging circuit includes first switch tube, first one-way conduction element, first input end and the second input terminal, first input end is connected to output end by the first one-way conduction element, second input terminal is connected to reference to ground, when output end is lower than first voltage threshold value relative to the voltage on reference ground, output is in charged state, when output end voltage rises to second voltage threshold value, output is in non-charged state, when output end voltage is reduced to first voltage threshold value, then return to charged state；In charged state, first switch tube shutdown, first input end is charged by the first one-way conduction element to output end, and when first input end voltage is negative, the control pole tension by controlling first switch tube makes the drain voltage of first switch tube close to second voltage；In non-charged state, first switch tube is fully on.
Description
Technical field
The present invention relates to power electronics fields, and in particular to a kind of control method of on-state charging circuit, control electricity
Road and on-state charging circuit.
Background technique
Home wiring control switch panel can integrate various sensor devices, provide detection to various equipment or illuminator
With the input interface of control, these sensor devices needs are supplied power for, and only have inside traditional wall mechanical switch magazine
As soon as firewire, for zero curve circuit switch on wall power supply at the bottleneck for limiting traditional equipment auto upgrading, how
Stable and safety single firewire power supply plan is provided into key technical problems.
It please refers to shown in Fig. 1, for a kind of power supply plan of single firewire.Switch K01 is the switch on switch panel, switch
Panel control load circuit 100 turn-on and turn-off, load blocks 100 be usually lighting load, including incandescent lamp, energy conservation it is glimmering
Light lamp, LED illumination etc..Bearing power range is differed from 3W to 1kW.
In single firewire power supply plan, by controlling the switch K01 being connected on firewire, charge to storage capacitor CS.
To in storage capacitor CS charging process, MOS Q01 is off, when firewire electric current from the flow direction drain electrode of the source electrode of MOS when
It waits, firewire electric current can be flowed through from the body diode of MOS Q01.The conduction voltage drop of body diode usually in 0.5~1.2V, with
Line current of catching fire is bigger, and body diode conduction voltage drop is higher.On the other hand, the load-carrying range of single fire line control panel is wide, from
3W to 2000W, the electric current on firewire can reach 10A or so in high power load, if passing through two pole of body of MOS Q01
Pipe will cause very lossy, and fever is serious, influence the safe and reliable property of MOS Q01.Even if in order to reduce two pole of body of MOS
Tube voltage drop generally also can a low conduction voltage drop in parallel Schottky diode, the pressure drop of Schottky diode is 0.3~
0.5V, but the application very big for high power load firewire electric current, loss still can be very big.
Scheme in Fig. 1 is half-wave power supply mode, and in half-wave power supply mode, the time of only half power frequency period can
To charge to capacitor CS, in order to improve output power range, on-state charging circuit can use all-wave power supply mode.It please refers to
Shown in Fig. 2, all-wave power supply mode is used for on-state charging circuit.Two MOS of QP and QN realize that input sinusoidal network voltage is positive and negative
Half cycle takes electricity, improves the number of storage capacitor CS supplement energy, and storage capacitor can power bigger power termination.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of control method of on-state charging circuit, control circuit and leading to
State charging circuit, to solve the problems, such as that MOS loss is big in single firewire on-state charging circuit in the prior art, reliability is low.
The technical solution of the invention is as follows, provides a kind of control method of on-state charging circuit, the on-state charging electricity
Road includes that first switch tube, the first one-way conduction element, first input end and the second input terminal, the first input end pass through
The first switch tube is connected to reference to ground, and the first input end is connected to output by the first one-way conduction element
End, second input terminal is connected to reference to ground, when the output end is lower than first voltage threshold value relative to the voltage on reference ground
When, the output is in charged state, when the output end voltage rises to second voltage threshold value, the output
In non-charged state, when the output end voltage is reduced to the first voltage threshold value, then charged state is returned to；
In the charged state, the first switch tube shutdown, the first input end is unidirectionally led by described first
Logical element charges to the output end, when the first input end voltage is negative, by the control electrode electricity for controlling first switch tube
Pressure so that the drain voltage of first switch tube close to second voltage；
In the non-charged state, the first switch tube is fully on；
The second voltage threshold value is greater than the first voltage threshold value；
The first one-way conduction element is diode or switching tube.
As optional, the on-state charging circuit further includes second switch and the second one-way conduction element, and described second
Input terminal is connected to the reference ground by the second switch, and second input terminal passes through second one-way conduction
Element is connected to the output end；
In the charged state, the second switch shutdown, second input terminal is unidirectionally led by described second
Logical element charges to the output end, when the first input end voltage is positive, by the control electrode electricity for controlling second switch
Pressure so that the drain voltage of first switch tube close to second voltage；
In the non-charged state, the second switch is fully on；
The second one-way conduction element is diode or switching tube.
As optional, in the charged state, when the first switch tube drain voltage is lower than first voltage, lead to
The control pole tension for crossing control first switch tube makes the drain voltage of first switch tube close to second voltage.
As optional, when the first one-way conduction element is switching tube, in the charged state, when described the
One switching tube drain voltage is greater than tertiary voltage threshold value, controls the first one-way conduction element conductive.
As optional, when the first one-way conduction element and the second one-way conduction element are all switching tube,
When the charged state, when the first switch tube drain voltage is greater than tertiary voltage threshold value, control first one-way conduction
Element conductive, when the second switch drain voltage is greater than tertiary voltage threshold value, control the second one-way conduction element is led
It is logical.
As optional, in the charged state, when input current is less than the first current threshold, to the output end
Charging.
As optional, in the charged state, when the electric current of the first one-way conduction element is greater than the first current threshold
Value, the first switch tube conducting.
As optional, in the charged state, when the electric current of the first switch tube is less than the second current threshold, institute
State first switch tube shutdown.
The invention adopt another scheme that a kind of control circuit of on-state charging circuit is provided, the list firewire on-state charging
Circuit includes first switch tube, the first one-way conduction element, first input end and the second input terminal, and the first input end is logical
The first switch tube to be crossed to be connected to reference to ground, first input end is connected to output end by the first one-way conduction element,
Second input terminal is connected to reference to ground,
When the output end is lower than first voltage threshold value relative to the voltage on reference ground, the output is in charging
State, when the output end voltage rises to second voltage threshold value, the output is in non-charged state, when described defeated
Outlet voltage drop then returns to charged state as low as the first voltage threshold value；
In the charged state, the control circuit control first switch tube shutdown, the first input end passes through institute
It states the first one-way conduction element to charge to the output end, when the first input end voltage is negative, the control circuit passes through
The control pole tension of control first switch tube makes first switch tube drain voltage close to second voltage；
In the non-charged state, it is fully on that the control circuit controls the first switch tube；
The second voltage threshold value is greater than the first voltage threshold value；
The first one-way conduction element is diode or switching tube.
As optional, the on-state charging circuit further includes second switch and the second one-way conduction element, and described second
Input terminal is connected to the reference ground by the second switch, and second input terminal passes through second one-way conduction
Element is connected to the output end；
In the charged state, the control circuit controls the second switch shutdown, and second input terminal is logical
It crosses the second one-way conduction element and gives output end charging, when the first input end voltage is positive, the control circuit
Control pole tension by controlling second switch makes the drain voltage of first switch tube close to second voltage；
In the non-charged state, it is fully on that the control circuit controls the second switch；
The second one-way conduction element is diode or switching tube.
As optional, when the first one-way conduction element is switching tube, in the charged state, when the control
Circuit processed detects that the first switch tube drain voltage is greater than tertiary voltage threshold value, the control circuit control described first
One-way conduction element conductive.
As optional, in the charged state, when the control circuit detects the first one-way conduction element
Electric current is greater than the first current threshold, the first switch tube conducting.
Another technical solution of the invention is to provide a kind of on-state charging circuit.
Using circuit structure and method of the invention, compared with prior art, have the advantage that the present invention can be big
Big to improve in single firewire power applications, the loss of switching tube in on-state charging circuit greatly improves bringing onto load power application model
It encloses.The fever for reducing switching tube in on-state charging circuit substantially increases peace for electrician's class switch panel products application
Full property and reliability.
Detailed description of the invention
Fig. 1 is a kind of half-wave electrical schematic of list firewire in the prior art；
Fig. 2 is a kind of all-wave electrical schematic of list firewire in the prior art；
Fig. 3 is the single firewire half-wave power supply circuit schematic diagram of the present invention；
Fig. 4 is the present invention in one embodiment of half-wave power supply, input voltage, input current, output voltage and first
Switch controlled pole tension waveform diagram；
Fig. 5 (a) be the present invention in one embodiment, first switch tube be connected when switching tube drain voltage VDP and
First switch tube controls pole tension GATEP waveform；
Fig. 5 (b) be the present invention in another embodiment, first switch tube be connected when switching tube drain voltage VDP with
And first switch tube controls pole tension GATEP waveform；
Fig. 6 is the single firewire all-wave power supply circuit schematic diagram of the present invention；
Fig. 7 is the present invention in one embodiment of all-wave power supply, input voltage, input current, output voltage, first
Switch controlled pole tension and second switch control electrode voltage waveform；
Fig. 8 (a) is second switch of the present invention switching tube drain voltage VDN when off and second switch is managed
The waveform of pole tension GATEN processed；
Fig. 8 (b) is first switch tube of the present invention switching tube drain voltage VDP when off and first switch is managed
The waveform of pole tension GATEP processed；
Fig. 9 is the present invention in another embodiment of all-wave power supply, input voltage, input current, output voltage, the
One switch controlled pole tension and second switch control electrode voltage waveform；
Figure 10 is the signal that the first one-way conduction element is realized with switching tube in the single firewire half-wave power supply circuit of the present invention
Figure；
Figure 11 be the present invention half-wave power supply another embodiment in, input voltage, input current, output voltage and
First switch tube control electrode voltage oscillogram；
Figure 12 be the present invention half-wave power supply another embodiment in, input voltage, input current, output voltage and
First switch tube control electrode voltage oscillogram；
Figure 13 (a) is a kind of realization block diagram of control circuit 210；
Figure 13 (b) is another realization block diagram of control circuit 210；
Figure 14 is the circuit diagram that the single firewire half-wave of the present invention is powered in another embodiment；
Figure 15 is another realization block diagram of control circuit 210.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to this
A little embodiments.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, tool is described in detail in the following preferred embodiment of the present invention
The details of body, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
The present invention provides a kind of control method of on-state charging circuit for single firewire, please refers to shown in Fig. 3, described
On-state charging circuit includes first switch tube QP, the first one-way conduction element DP, first input end L1 and the second input terminal L2,
The first input end L1 is connected to by the first switch tube QP with reference to ground, and the first input end L1 passes through described the
One one-way conduction element DP is connected to output end VO, and the second input terminal L2 is connected to reference to ground, when the output end VO phase
First voltage threshold value V is lower than for the voltage on reference groundth-onWhen, the output is in charged state, when the output end electricity
Pressure rises to second voltage threshold value Vth-offWhen, the output is in non-charged state, when the output end voltage is reduced to
The first voltage threshold value Vth-on, then charged state is returned to；Second voltage threshold value Vth-offGreater than the first voltage threshold value
Vth-on.First one-way conduction element is diode or switching tube.
It please refers to shown in Fig. 4, since output voltage VO is lower than first voltage threshold value V at the beginningth-on, it is in charged state,
Output voltage VO rises, but is never higher than second voltage threshold value Vth-off, so output end is constantly in charged state.
It is NMOS with first switch tube please continue to refer to shown in Fig. 4, for the first one-way conduction element is diode,
When charged state, first switch tube shutdown, GATEP be it is low, the first input end is given by the first one-way conduction element
The output end charging, i.e. t11-t12 moment, since electric current flows to the second input terminal L2, two poles from first input end L1
Pipe DP conducting；At the t13 moment, electric current flows to first input end L1, body two of the electric current from first switch tube from the second input terminal L2
Pole pipe flows through, and first switch tube drain voltage is negative, by controlling the control pole tension of first switch tube, i.e. grid voltage,
To control first switch tube drain voltage close to second voltage；In one embodiment, second voltage can be set is
50mV.It please refers to shown in Fig. 5 (a), at the t13 moment, electric current flows to first input end L1, first switch from the second input terminal L2
Pipe drain voltage VDP decline, when dropping to 50mV, GATEP voltage rises, first switch tube conducting, first switch tube drain electrode
Voltage is controlled near 50mV, i.e., the absolute value of first switch tube drain-source voltage reduces, and reduces the damage of first switch tube
Consumption.
In non-charged state, first switch tube QP is fully on.
In another embodiment, at the t13 moment, electric current flows to first input end L1 from the second input terminal L2, electric current from
The body diode of first switch tube flows through, and first switch tube drain voltage is negative, when first switch tube drain voltage is lower than first
When voltage, first switch tube drain voltage is controlled close to second voltage；In one embodiment, can be set first voltage be-
0.6V.It please refers to shown in Fig. 5 (b), at the t13 moment, electric current flows to first input end L1, first switch from the second input terminal L2
Pipe drain voltage VDP decline, when dropping to 0.6V, GATEP is height, first switch tube conducting, first switch tube drain electrode electricity
VDP is pressed to rise.
In half-wave power supply mode, only the time of half power frequency period can charge to capacitor CS, in order to improve output
Power bracket, charging circuit can use all-wave power supply mode.It please refers to shown in Fig. 6, on-state charging circuit further includes second opening
Pipe QN and the second one-way conduction element DN, the second input terminal L2 is closed to be connected to by the second switch QN with reference to ground,
Second input terminal L2 is connected to the output end VO by the second one-way conduction element DN；In Fig. 6, second is unidirectionally led
Logical element is diode, and the second one-way conduction element is also possible to switching tube.
In charged state, the second switch QN shutdown, the second input terminal L2 passes through the second one-way conduction member
Part DN charges to the output end, pole tension is controlled by control second switch, so that second switch drain voltage
VDN is close to second voltage；
In the charged state, the second switch QN is fully on；
In one embodiment, in charged state, the second switch QN shutdown, the second input terminal L2 passes through institute
The second one-way conduction element DN is stated to charge to the output end, when second switch drain voltage VDN is lower than first voltage,
Second switch drain voltage VDN is controlled close to second voltage.
It please refers to shown in Fig. 7, waveform diagram when for using all-wave power supply mode.When in charged state, in power frequency period
Positive half cycle and negative half period, have electric current from input terminal give output end power supply.
It please refers to shown in Fig. 8 (a) and Fig. 8 (b), respectively t22 moment second switch grid voltage GATEN and second
The wave of switching tube drain voltage VDN and t24 moment first switch tube grid voltage GATEP and first switch tube drain voltage VDP
Shape.It is illustrated by taking Fig. 8 (a) as an example, when the electric current Jing Guo second switch is big, second switch grid voltage GATEN is to most
Big value, drain voltage are still below second voltage VREF2, wherein second voltage is negative voltage.By the electricity of second switch
Stream reduces, and second switch grid voltage GATEN is reduced, so that second switch drain voltage VDN is close to second voltage
VREF2.At the t22 moment, the electric current by second switch is reduced to zero, and second switch grid voltage GATEN is also reduced to
Zero, second switch shutdown.
It please refers to shown in Fig. 9, for for using the waveform diagram under another kind operating condition when all-wave power supply mode.In t31-
T32 moment, output voltage VO are always below Vth-off, output is in charged state；At the t32 moment, output voltage VO reaches
Vth-off, therefore, be switched to non-charged state from charged state, GATEP and GATEN be all it is high, electric current is from first input end L1
The second input terminal L2 is flowed to by first switch tube and second switch, without electric current to output, output voltage VO decline.?
T33 moment output voltage is reduced to Vth-on, it is returned to charged state, GATEN and GATEP are low, first switch tube and
Two switching tubes are turned off.At the t34 moment, the drain voltage VDP of first switch tube QP is lower than first voltage, first switch tube QP
Conducting.
In Fig. 3, the first one-way conduction element is realized with diode, can also be realized with switching tube.Please refer to Figure 10
It is shown, when the first one-way conduction element DP is switching tube, in the charged state, when the first switch tube is leaked
Pole tension VDP is greater than tertiary voltage threshold value, controls the first one-way conduction element conductive.Preferably, the third is arranged
Threshold value is that output voltage VO adds 0.6V or so.Namely detect that the drain-source voltage of switching tube DP is greater than 0.6V, then control switch
Pipe DP conducting, to reduce the conduction loss of switching tube DP.
First breakover element of all-wave power supply and the second breakover element can all be realized with switching tube.When described first
When one-way conduction element and the second one-way conduction element are all switching tube, in the charged state, open when described first
It closes pipe drain voltage and is greater than tertiary voltage threshold value, control the first one-way conduction element conductive, when the second switch is leaked
Pole tension is greater than tertiary voltage threshold value, controls the second one-way conduction element conductive.
In charged state, the electric current by the first one-way conduction element or the second one-way conduction element is by input electricity
What stream determined, when input current is larger, then also can by the electric current of the first one-way conduction element or the second one-way conduction element
Larger, the loss of the first one-way conduction element or the second one-way conduction element is big, and fever is serious, is unfavorable for unidirectionally leading first
Logical element or the second one-way conduction element and control circuit 210 are integrated into chip.In order to reduce the first one-way conduction element
Or second one-way conduction element loss, only when input current is small, just to output charging.
By taking half-wave is powered as an example, in charged state, when the electric current of the first one-way conduction element is greater than the first current threshold
Value, the first switch tube conducting.It please refers to shown in Figure 11, at the t41 moment, the first one-way conduction element conductive, output voltage
VO rises, and at the t42 moment, is greater than the first current threshold by the electric current of the first one-way conduction element, and first switch tube is connected,
GATEP is got higher from low, stops giving output charging.At the t43 moment, input current is closed less than the second current threshold, first switch tube
Disconnected, GATEP is lower from height, and input gives output charging by the first one-way conduction element.At the t44 moment, input current drops to
Zero, output charging is given without electric current.At the t45 moment, input current flows to first input end L1, electric current from the second input terminal L2
By the body diode of first switch tube, when detect first open the light pipe drain voltage lower than first voltage, then first switch
Pipe conducting.In the embodiment in figure 11, the first current threshold is equal to the second current threshold.Second current threshold also can be set
At less than the first current threshold.
It please refers to shown in Figure 12, is arranged to zero waveform diagram for the second current threshold.
The present invention provides a kind of control circuit 210 of on-state charging circuit for single firewire, please refers to shown in Fig. 3, single
Firewire on-state charging circuit includes first switch tube QP, the first one-way conduction element DP, first input end L1 and the second input terminal
L2, the first input end L1 are connected to by the first switch tube QP with reference to ground, and the first input end L1 passes through described
First one-way conduction element DP is connected to output end VO, and the second input terminal L2 is connected to reference to ground, as the output end VO
Voltage relative to reference ground is lower than first voltage threshold value Vth-onWhen, the output is in charged state, when the output
End voltage rises to second voltage threshold value Vth-offWhen, the output is in non-charged state, when the output end voltage drops
As low as the first voltage threshold value Vth-on, then charged state is returned to；Second voltage threshold value Vth-offGreater than the first voltage threshold
Value Vth-on.First one-way conduction element is diode or switching tube.
It please refers to shown in Fig. 4, since output voltage VO is lower than first voltage threshold value V at the beginningth-on, it is in charged state,
Output voltage VO rises, but is never higher than second voltage threshold value Vth-off, so output end is constantly in charged state.
In charged state, the control circuit 210 controls first switch tube QP shutdown, and the first input end L1 is logical
It crosses the first one-way conduction element DP to charge to the output end, the control circuit 210 passes through control first switch tube
Control pole tension makes first switch tube drain voltage VDP close to second voltage；In non-charged state, the control circuit
The 210 control first switch tube QP are fully on.
In another embodiment, in charged state, the control circuit 210 controls first switch tube QP shutdown, institute
It states first input end L1 and is charged by the first one-way conduction element DP to the output end, when the control circuit 210 is examined
When measuring first switch tube drain voltage VDP lower than first voltage, the control circuit 210 controls first switch tube drain electrode electricity
Press VDP close to second voltage.
In half-wave power supply mode, only the time of half power frequency period can charge to capacitor CS, in order to improve output
Power bracket, on-state charging circuit can use all-wave power supply mode.It please refers to shown in Fig. 6, single firewire on-state charging circuit is also
Including second switch QN and the second one-way conduction element DN, the second input terminal L2 is connected by the second switch QN
It is connected to reference to ground, the second input terminal L2 is connected to the output end VO by the second one-way conduction element DN；In Fig. 6,
Second one-way conduction element is diode, and the second one-way conduction element is also possible to switching tube.
In charged state, the control circuit 210 controls second switch QN shutdown, and the second input terminal L2 passes through institute
It states the second one-way conduction element DN to charge to the output end, the control electrode electricity that control circuit 210 passes through control second switch
Pressure so that second switch drain voltage VDN close to second voltage；In the charged state, the second switch QN is complete
Full conducting.
In another embodiment, in charged state, the control circuit 210 controls second switch QN and turns off, and second
Input terminal L2 is charged by the second one-way conduction element DN to the output end, when control circuit 210 detects that second opens
When closing pipe drain voltage VDN lower than first voltage, control circuit 210 controls second switch drain voltage VDN close to the second electricity
Pressure.
It please refers to shown in Figure 13 (a), the control circuit 210 includes first voltage feed circuit 212；First electricity
Pressure feed circuit 212 receives the output end voltage VO, and the output end voltage VO and first voltage threshold value and second is electric
Pressure threshold value is compared, and whether the output voltage of the first voltage feed circuit, which characterizes the on-state charging circuit and be in, fills
Electricity condition.
Please continue to refer to shown in Figure 13 (a), the control circuit 210 further includes operational amplification circuit 214 and logic circuit
213, the logic circuit 213 receives the output voltage of the voltage feedback circuit 212, and the operational amplification circuit 214 receives
The first switch tube drain voltage VDP and second voltage VREF2, the output signal of the logic circuit 213 are the operation
The enable signal of amplifying circuit 214；When the output voltage of the voltage feedback circuit 212 characterizes at the on-state charging circuit
In charged state, states logic circuit 213 and enable the operational amplification circuit 214, the output of the operational amplification circuit 214 connects
It is connected to the control terminal GATEP of first switch tube, the operational amplification circuit 214 is by adjusting first switch tube control terminal voltage
GATEP, so that the first switch tube drain voltage VDP is close to the second voltage VREF2.
In another embodiment, it please refers to shown in Figure 13 (b), the control circuit 210 further includes the first comparison circuit
211, first comparison circuit 211 receives the first switch tube drain voltage VDP and first voltage VREF1, and to described
First switch tube drain voltage VDP and the first voltage VREF1 are compared, and the logic circuit 213 receives described first
The output voltage of the output voltage of comparison circuit 211 and the voltage feedback circuit 212, the operational amplification circuit 214 receive
The first switch tube drain voltage VDP and second voltage VREF2, the output signal of the logic circuit 213 are the fortune
Calculate the enable signal of amplifying circuit 214；When the output voltage of the voltage feedback circuit 212 characterizes the on-state charging circuit
In charged state, and the first switch tube drain voltage VDP is lower than first voltage VREF1, the logic circuit 213
The operational amplification circuit 214 is enabled, the output of the operational amplification circuit 214 is connected to the control terminal of first switch tube
GATEP, the operational amplification circuit 214 is by adjusting first switch tube control terminal voltage GATEP, so that the first switch
Pipe drain voltage VDP is close to the second voltage VREF2.
Please continue to refer to shown in Figure 13 (b), the control circuit further includes pull-up circuit 215, the pull-up circuit 215
The output voltage for receiving the voltage feedback circuit 212, when the output voltage characterization of the voltage feedback circuit 212 is described logical
State charging circuit is in non-charged state, and the pull-up circuit 215 pulls up the first switch tube control terminal GATEP, and institute
It states logic circuit 213 and does not enable the operational amplification circuit 214.
In Fig. 3, the first one-way conduction element is realized with diode, can also be realized with switching tube.Please refer to Figure 10
It is shown, when the first one-way conduction element is switching tube, in the charged state, when the control circuit detects
The first switch tube drain voltage is greater than tertiary voltage threshold value, and the control circuit controls the first one-way conduction element
Conducting.
First breakover element of all-wave power supply and the second breakover element can all be realized with switching tube.In the charging
When state, when the control circuit detects that the electric current of the first one-way conduction element is greater than the first current threshold, described the
The conducting of one switching tube.
It is only small in input current in order to reduce the loss of the first one-way conduction element or the second one-way conduction element
When, just give output charging.It please refers to shown in Figure 14, by taking half-wave is powered as an example, in charged state, sampling first is unidirectionally led
The electric current of logical element, obtains the first one-way conduction element current sampled value I1, when the electric current of the first one-way conduction element is greater than the
One current threshold, the first switch tube QP conducting.In the charged state, the electric current of the first switch tube is sampled, is obtained
It opens the light tube current sampled value I2 to first, when the electric current of the first switch tube is less than the second current threshold, the first switch
Pipe shutdown.In the embodiment in figure 11, the first current threshold is equal to the second current threshold.Second current threshold also can be set
At less than the first current threshold.It please refers to shown in Figure 12, is arranged to zero waveform diagram for the second current threshold.
It please refers to shown in Figure 15, is a kind of embodiment of control circuit 210.Control circuit 210 further includes the first electric current
Sample circuit 216, the first current comparison circuit 217, the second current sampling circuit 218 and the second current comparison circuit 219.The
One current comparison circuit 217 and the second current comparison circuit 219 receive the first current sampling circuit 216 and the second electric current respectively
The output voltage of sample circuit 218, logic circuit 213 receive the first current comparison circuit 217 and the second current comparison circuit
219 output voltage.The electric current that first current sampling circuit 216 samples the first one-way conduction element obtains the first one-way conduction
Element current sampled value I1, the first current comparison circuit 217 compare the first one-way conduction element current sampled value I1 and first
Current threshold, when the electric current of the first one-way conduction element is greater than the first current threshold, the logic circuit 213 is controlled on described
Puller circuit pulls up the control terminal of first switch tube, first switch tube QP conducting.
Please continue to refer to shown in Figure 15, in charged state, the second current sampling circuit 218 samples the first switch
The electric current of pipe obtains first and opens the light tube current sampled value I2, and the second current comparison circuit 219 compares first tube current that opens the light and adopts
Sample value I2 and the second current threshold, when the electric current of first switch tube is less than the second current threshold, the logic circuit 213 does not make
Energy pull-up circuit, the control terminal of first switch tube pulled down to low level, first switch tube shutdown.Generally, first switch tube
Control electrode can all have pull down resistor to ground, therefore, when pull-up circuit is not enabled, can be pulled down resistive pull-downs to zero.
It should be noted that in some embodiments, with half-wave power supply circuit for example, these embodiments are not limited to
Half-wave power supply circuit can be applied in all-wave power supply circuit.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known,
It then can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (13)
1. a kind of control method of on-state charging circuit, the on-state charging circuit includes first switch tube, the first one-way conduction
Element, first input end and the second input terminal, the first input end is connected to by the first switch tube with reference to ground, described
First input end is connected to output end by the first one-way conduction element, and second input terminal is connected to reference to ground,
It is characterized in that:
When the output end is lower than first voltage threshold value relative to the voltage on reference ground, the output in charged state,
When the output end voltage rises to second voltage threshold value, the output is in non-charged state, when the output end electricity
Pressure drop then returns to charged state as low as the first voltage threshold value；
In the charged state, the first switch tube shutdown, the first input end passes through the first one-way conduction member
Part charges to the output end, and when the first input end voltage is negative, the control pole tension by controlling first switch tube makes
First switch tube drain voltage close to second voltage；
In the non-charged state, the first switch tube is fully on；
The second voltage threshold value is greater than the first voltage threshold value；
The first one-way conduction element is diode or switching tube.
2. the control method of on-state charging circuit according to claim 1, it is characterised in that:
The on-state charging circuit further includes second switch and the second one-way conduction element, and second input terminal passes through described
Second switch is connected to the reference ground, and second input terminal is connected to described defeated by the second one-way conduction element
Outlet；
In the charged state, the second switch shutdown, second input terminal passes through the second one-way conduction member
Part charges to the output end, and when the first input end voltage is positive, the control pole tension by controlling second switch makes
Second switch drain voltage close to second voltage；
In the non-charged state, the second switch is fully on；
The second one-way conduction element is diode or switching tube.
3. the control method of on-state charging circuit according to claim 1, it is characterised in that: in the charged state,
When the first switch tube drain voltage is lower than first voltage, the control pole tension by controlling first switch tube makes first
The drain voltage of switching tube is close to second voltage.
4. the control method of on-state charging circuit according to claim 1, it is characterised in that: when first one-way conduction
When element is switching tube, in the charged state, when the first switch tube drain voltage is greater than tertiary voltage threshold value, control
The first one-way conduction element conductive.
5. the control method of on-state charging circuit according to claim 2, it is characterised in that: when first one-way conduction
When element and the second one-way conduction element are all switching tube, in the charged state, when the first switch tube drains
Voltage is greater than tertiary voltage threshold value, the first one-way conduction element conductive is controlled, when the second switch drain voltage is big
In tertiary voltage threshold value, the second one-way conduction element conductive is controlled.
6. the control method of on-state charging circuit according to claim 1, it is characterised in that: in the charged state,
When input current is less than the first current threshold, charge to the output end.
7. the control method of on-state charging circuit according to claim 6, it is characterised in that: in the charged state,
When the electric current of the first one-way conduction element is greater than the first current threshold, the first switch tube conducting.
8. the control method of on-state charging circuit according to claim 7, it is characterised in that: in the charged state,
When the electric current of the first switch tube is less than the second current threshold, the first switch tube shutdown.
9. a kind of control circuit of on-state charging circuit, the on-state charging circuit includes first switch tube, the first one-way conduction
Element, first input end and the second input terminal, the first input end is connected to by the first switch tube refers to ground, and first
Input terminal is connected to output end by the first one-way conduction element, and second input terminal is connected to reference to ground, feature
It is:
When the output end is lower than first voltage threshold value relative to the voltage on reference ground, the output in charged state,
When the output end voltage rises to second voltage threshold value, the output is in non-charged state, when the output end electricity
Pressure drop then returns to charged state as low as the first voltage threshold value；
In the charged state, control circuit control first switch tube shutdown, the first input end passes through described the
One one-way conduction element charges to the output end, and when the first input end voltage is negative, the control circuit passes through control
The control pole tension of first switch tube makes first switch tube drain voltage close to second voltage；
In the non-charged state, it is fully on that the control circuit controls the first switch tube；
The second voltage threshold value is greater than the first voltage threshold value；
The first one-way conduction element is diode or switching tube.
10. the control circuit of on-state charging circuit according to claim 9, it is characterised in that:
The on-state charging circuit further includes second switch and the second one-way conduction element, and second input terminal passes through described
Second switch is connected to the reference ground, and second input terminal is connected to described defeated by the second one-way conduction element
Outlet；
In the charged state, the control circuit controls the second switch shutdown, and second input terminal passes through institute
It states the second one-way conduction element to charge to the output end, when the first input end voltage is positive, the control circuit passes through
The control pole tension of control second switch makes the drain voltage of second switch close to second voltage；
In the non-charged state, it is fully on that the control circuit controls the second switch；
The second one-way conduction element is diode or switching tube.
11. the control circuit of on-state charging circuit according to claim 9, it is characterised in that:
When the first one-way conduction element is switching tube, in the charged state, when the control circuit detects institute
First switch tube drain voltage is stated greater than tertiary voltage threshold value, the control circuit controls the first one-way conduction element and leads
It is logical.
12. the control circuit of on-state charging circuit according to claim 9, it is characterised in that: in the charged state,
When the control circuit detects that the electric current of the first one-way conduction element is greater than the first current threshold, the first switch tube
Conducting.
13. a kind of on-state charging circuit, it is characterised in that: including the control circuit as described in claim 9~12 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811266160.5A CN109347161A (en) | 2018-10-29 | 2018-10-29 | A kind of control method of on-state charging circuit, control circuit and on-state charging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811266160.5A CN109347161A (en) | 2018-10-29 | 2018-10-29 | A kind of control method of on-state charging circuit, control circuit and on-state charging circuit |
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| CN109347161A true CN109347161A (en) | 2019-02-15 |
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ID=65310879
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811266160.5A Pending CN109347161A (en) | 2018-10-29 | 2018-10-29 | A kind of control method of on-state charging circuit, control circuit and on-state charging circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110061553A (en) * | 2019-04-16 | 2019-07-26 | 杰华特微电子（杭州）有限公司 | On-state control method for charging circuit, control circuit and on-state charging circuit |
| CN110165760A (en) * | 2019-04-16 | 2019-08-23 | 杰华特微电子（杭州）有限公司 | Control method, control circuit and the single firewire charging circuit of single firewire charging circuit |
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| WO2016016797A2 (en) * | 2014-07-31 | 2016-02-04 | Hau King Kuen | Phase cut dimming control and protection |
| CN107404225A (en) * | 2017-07-13 | 2017-11-28 | 杰华特微电子（杭州）有限公司 | Voltage regulator circuit and method |
| CN209119837U (en) * | 2018-10-29 | 2019-07-16 | 杰华特微电子（杭州）有限公司 | A kind of control circuit and on-state charging circuit of on-state charging circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016016797A2 (en) * | 2014-07-31 | 2016-02-04 | Hau King Kuen | Phase cut dimming control and protection |
| CN204794222U (en) * | 2015-07-15 | 2015-11-18 | 杰华特微电子（张家港）有限公司 | Controlling means that charges of battery charging outfit |
| CN107404225A (en) * | 2017-07-13 | 2017-11-28 | 杰华特微电子（杭州）有限公司 | Voltage regulator circuit and method |
| CN209119837U (en) * | 2018-10-29 | 2019-07-16 | 杰华特微电子（杭州）有限公司 | A kind of control circuit and on-state charging circuit of on-state charging circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110061553A (en) * | 2019-04-16 | 2019-07-26 | 杰华特微电子（杭州）有限公司 | On-state control method for charging circuit, control circuit and on-state charging circuit |
| CN110165760A (en) * | 2019-04-16 | 2019-08-23 | 杰华特微电子（杭州）有限公司 | Control method, control circuit and the single firewire charging circuit of single firewire charging circuit |
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