CN104124868B - Voltage raising and reducing shares control circuit - Google Patents
Voltage raising and reducing shares control circuit Download PDFInfo
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- CN104124868B CN104124868B CN201310151374.9A CN201310151374A CN104124868B CN 104124868 B CN104124868 B CN 104124868B CN 201310151374 A CN201310151374 A CN 201310151374A CN 104124868 B CN104124868 B CN 104124868B
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- 238000001514 detection method Methods 0.000 claims description 54
- 210000002445 nipple Anatomy 0.000 claims description 3
- 230000006837 decompression Effects 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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Abstract
A kind of voltage raising and reducing shares control circuit, is related to technical field of power management, and what is solved is the technical problem that prior art cost is high and control is complicated.The circuit includes the public inductance of buck, buck management loop, first end pin, the second end pin；The buck management loop includes the first management switch pipe, the second management switch pipe, and for controlling the pulse signal generator of two management switch pipe alternate conductions；The public inductance of buck first it is public terminate to first end pin, second public the first management switch of end pipe of the public inductance of buck is connected to the second end pin, and is connected to ground through the second management switch pipe；The control terminal of the first management switch pipe and the second management switch pipe is coupled with the pulse signal output end of pulse signal generator.Circuit provided by the invention, especially suitable for the handheld device with rechargeable battery.
Description
Technical field
The present invention relates to power management techniques, more particularly to a kind of technology of the shared control circuit of voltage raising and reducing.
Background technology
Generally use lithium battery power supply in the handheld device, cell voltage working range in 3.3V between 4.2V, and very
More application environments require the power supply for providing 5V, at this time need to just use pressure build-up technique by the voltage increase of lithium battery to 5V voltages
Output.Also many application requirements provide low-voltage output, such as the large current charge skill of lithium battery in the case where inputting 5V
Art requires to use switched charge framework, will be available to lithium cell charging after the 5V decompressions of input, can so solve because
Charging current limits bottleneck caused by being overheated for power management chip.In order to solve the above problems, currently existing scheme is to use to open
Close boosting output circuit, switch buck output circuit.
Fig. 2 is existing boost switching output circuit, and the circuit introduces the anti-of output end VUSB using error amplifier 106
Feedthrough voltage signal, the output of error amplifier 106 introduce an input of PWM comparators 105, inductive current sampling module 103
Output with triangular signal together enter PWM comparators 105 another input, by PWM comparators output PWM control
Signal controls two current path switching tubes 101,102 to replace break-makes, when current path switching tube 101 ends, current path
Switching tube 102 is turned on, now boost inductance L11 energy storage, and when current path switching tube 101 turns on, current path switching tube 102 is cut
Only, now boost inductance L11 powers together with circuit input end VIN battery to circuit output end VUSB, so as to realize boosting
Output.
Fig. 3 is existing switch buck output circuit, and the circuit introduces output port VOUT's using error amplifier 206
Feedback voltage signal, the output of error amplifier 206 introduce an input of PWM comparators 205, inductive current sampling module
203 output enters another input of PWM comparators 205 with triangular signal together, and PWM is exported by PWM comparators
Control signal controls two current path switching tubes 201,202 to replace break-makes, when current path switching tube 201 turns on, electric current
Channel selector pipe 202 ends, now buck inductor L22 energy storage, when current path switching tube 201 ends, current path switching tube
202 conductings, now buck inductor L22 is individually to circuit output end VOUT power supplies, so as to realize reduced output voltage.
As can be seen here, the system control ring of the boost switching output circuit shown in Fig. 2, Fig. 3 and switch buck output circuit
Road basic structure is similar, and difference is that electric current flows through the direction difference of inductance.
Fig. 4 is existing lithium battery switched charge circuit, and the circuit employs the switch buck output circuit 301 shown in Fig. 3
With reference to the linear charge management circuit 302 of battery, realizing power end VUSB reduced output voltages, filled for battery-end VBAT rechargeable battery
Electricity.
In existing handheld device, in order to realize boosting output power supply, decompression charging, the buck shown in Fig. 5 is all employed
Controling circuit structure, in this buck controling circuit structure, boost switching output circuit BOOST, switch buck output electricity
The linear charge management circuit CHARGE of road BUCK, battery is separate, and battery-end VBAT exports electricity by boost switching
Road BOOST boosts to load end VOUT to power, and power end VUSB passes through switch buck output circuit BUCK, the linear charging valve of battery
Circuit CHARGE is managed to power to battery-end VBAT, therefore the component employed in this buck controling circuit structure is more,
Circuit cost is also of a relatively high, and control is also relative complex.
The content of the invention
For defect present in above-mentioned prior art, the technical problems to be solved by the invention are to provide a kind of cost
It is low, control simple voltage raising and reducing to share control circuit.
In order to solve the above-mentioned technical problem, a kind of voltage raising and reducing provided by the present invention shares control circuit, and its feature exists
In：Including the public inductance of buck, buck management loop, first end pin, the second end pin；
The both ends of the public inductance of buck are respectively the first public end, the second public end；
Buck management loop include triangular-wave generator, mode switch module, management loop error amplifier,
PWM controls comparator, and two management switch pipes, for controlling the pulse signal of two management switch pipe alternate conductions to occur
Device, described two management switch pipes are respectively the first management switch pipe, the second management switch pipe；
The first of the public inductance of buck public terminates to first end pin, the second public end of the public inductance of buck
The second end pin is connected to through the first management switch pipe, and is connected to ground through the second management switch pipe；
The control terminal of the first management switch pipe and the second management switch pipe is coupled with the arteries and veins of pulse signal generator
Rush signal output part；
One input termination reference voltage of the management loop error amplifier, another input is that feedback signal is defeated
Enter end；
The output end of one input pipe nipple reason loop error amplifier of the PWM controls comparator, another input
The triangular signal output end of triangular-wave generator is terminated, the output of PWM control comparators terminates to pulse signal generator
Control signal input；
The mode switch module includes the first switching switching tube, the second switching switching tube；
Second end pin connects the first switching switching tube to the feedback signal of management loop error amplifier through divider resistance
Input, and the first switching switching tube is connect to pipe through light-load mode feedback partial pressure controlling switch, a feedback allotment resistance successively
Manage the feedback signal input terminal of loop error amplifier；
First public end of the public inductance of buck connects the second switching switching tube through divider resistance and missed to management loop
The feedback signal input terminal of poor amplifier.
Further, the buck management loop also includes being used to control the first switching switching tube, the second switching switch
The mode detection module of pipe alternate conduction；
The mode detection module includes underloading detection comparator, port voltage detection comparator, mode detection and door；
First public end of one input termination public inductance of buck of the underloading detection comparator, another input
End is connected to first end pin through divider resistance；
One input termination reference voltage of the port voltage detection comparator, another input connect through divider resistance
To the second end pin；
One input of the mode detection and door terminates to the control of BOOST light-load modes feedback partial pressure controlling switch
Hold, and the output end of underloading detection comparator is connected to through a timing module, another input of mode detection and door terminates to
The output end of the output end of mouth voltage detection comparator, mode detection and door is connected to the second switching switching tube through another timing module
Control terminal, another timing module is also connected to the control terminal of the first switching switching tube through a reverser.
Further, in addition to Charge Management loop, the Charge Management loop include major loop charging driving tube, mirror image
Driving tube, charging current controlling switch pipe, charge loop error amplifier, the first charging control switch, the second charge control are opened
Close；
First public end of the public inductance of buck is connected to first end pin by major loop charging driving tube, and successively
Connect mirror image driving tube, charging current controlling switch pipe to ground；
One input termination reference voltage of the charge loop error amplifier, another input connect through divider resistance
To first end pin, the output of charge loop error amplifier terminates to the control terminal of charging current controlling switch pipe；
The control of the major loop charging driving tube terminates the first charging control switch to ground, and is opened through the second charge control
Pass connects charging current controlling switch pipe to ground；
The control termination charging current controlling switch pipe of the mirror image driving tube is connected to ground.
Voltage raising and reducing provided by the invention shares control circuit, and boosting, decompression share same inductance, and share with a pair
Switching tube, two management switch pipe alternate conductions are controlled using pulse signal generator to realize that boosting, decompression control, are being boosted
Under pattern can using the feedback voltage combination triangular signal of the second end pin come the output signal of control wave generator,
Using the feedback voltage combination triangular signal at public the first public end of inductance of buck pulse can be controlled to believe under decompression mode
The output signal of number generator, and then when controlling conducting of two management switch pipes under boost mode and decompression mode respectively
Sequence, have cost low, control the characteristics of simple.
Brief description of the drawings
Fig. 1 is that the voltage raising and reducing of the embodiment of the present invention shares the electrical block diagram of control circuit；
Fig. 2 is the electrical block diagram of existing boost switching output circuit；
Fig. 3 is the electrical block diagram of existing switch buck output circuit；
Fig. 4 is the electrical block diagram of existing lithium battery switched charge circuit；
Fig. 5 is the electrical block diagram of existing buck control circuit；
Fig. 6 is the operation principle signal that the voltage raising and reducing of the embodiment of the present invention shares the mode detection module in control circuit
Figure；
Fig. 7 is the circuit structure signal that the voltage raising and reducing of the embodiment of the present invention shares the mode detection module in control circuit
Figure.
Embodiment
Embodiments of the invention are described in further detail below in conjunction with brief description of the drawings, but the present embodiment is not used to limit
The system present invention, every similar structure using the present invention and its similar change, all should be included in protection scope of the present invention.
As shown in figure 1, a kind of voltage raising and reducing that the embodiment of the present invention is provided shares control circuit, it is characterised in that：Bag
Include the public inductance 503 of buck, buck management loop 501, first end pin VBAT, the second end pin VUSB；
The both ends of the public inductance 503 of buck are respectively the first public end VB, the second public end SW；
First public end VB of the public inductance 503 of buck is connected to ground, second end pin through a discharge capacity C1
VUSB is connected to ground through another discharge capacity C2；
The buck management loop 501 includes triangular-wave generator RAMP, mode detection module 504, pattern switching mould
Block, management loop error amplifier EA01, PWM control comparator EA02, and two management switch pipes, for controlling two management
The pulse signal generator U500 of switching tube alternate conduction, described two management switch pipes be respectively the first management switch pipe 511,
Second management switch pipe 512；
An input termination reference voltage Vref of the management loop error amplifier EA01, another input is anti-
Feedback signal input；
An input pipe nipple reason loop error amplifier EA01 of PWM control comparators EA02 output end, separately
One input termination triangular-wave generator RAMP triangular signal output end, PWM control comparators EA02 output terminate to
Pulse signal generator U500 control signal input；
First public end VB of the public inductance 503 of buck is connected to first end pin VBAT, the public inductance 503 of buck
The second public end SW be connected to the second end pin VUSB through the first management switch pipe 511, and be connected to through the second management switch pipe 512
Ground；
The control terminal of the first management switch pipe 511 and the second management switch pipe 512 is coupled with pulse signal
Device U500 pulse signal output end；
The mode switch module includes the first switching switching tube 521, second and switches switching tube 522；
The second end pin VUSB connects the first switching switching tube 521 to management loop error amplifier EA01 through divider resistance
Feedback signal input terminal, and through a light-load mode feed back partial pressure controlling switch 523, one successively and feed back allotment resistance and connect first and cut
Switching tube 521 is changed to management loop error amplifier EA01 feedback signal input terminal；
First public end VB of the public inductance 503 of buck connects the second switching switching tube 522 to pipe through divider resistance
Manage loop error amplifier EA01 feedback signal input terminal；
The mode detection module 504 is used to control the first switching switching tube, the second switching switching tube alternate conduction；
As shown in fig. 7, the mode detection module 504 includes underloading detection comparator 701, port voltage detection comparator
703rd, mode detection and door 706；
First public end VB of one input termination public inductance 503 of buck of the underloading detection comparator 701, separately
One input is connected to first end pin VBAT through divider resistance；
One input termination reference voltage Vref of the port voltage detection comparator 703, another input is through dividing
Piezoresistance is connected to the second end pin VUSB；
One input of the mode detection and door 706 terminates to BOOST light-load modes feedback partial pressure controlling switch 523
Control terminal, and the output end of underloading detection comparator 701 is connected to through a timing module 702, another of mode detection and door are defeated
Enter to terminate to the output end of port voltage detection comparator 703, the output end of mode detection and door connects through another timing module 704
To the control terminal of the second switching switching tube 522, another timing module 704 is also connected to the first switching switching tube 521 through a reverser
Control terminal.
In the embodiment of the present invention, in addition to Charge Management loop 502, the Charge Management loop include major loop charging and driven
Dynamic pipe 531, mirror image driving tube 532, charging current controlling switch pipe 533, charge loop error amplifier EA03, the first charging control
System the 534, second charging control switch 535 of switch；
First public end VB of the public inductance 503 of buck is connected to first end by major loop charging driving tube 531
Pin VBAT, and mirror image driving tube 532, charging current controlling switch pipe 533 to ground are connect successively；
An input termination reference voltage Vref of the charge loop error amplifier EA03, another input is through dividing
Piezoresistance is connected to first end pin VBAT, and charge loop error amplifier EA03 output terminates to charging current controlling switch pipe
533 control terminal；
The control of the major loop charging driving tube 531 terminates the first charging control switch 534 to ground, and through the second charging
Controlling switch 535 connects charging current controlling switch pipe 533 to ground；
The control termination charging current controlling switch pipe 533 of the mirror image driving tube 532 is connected to ground.
Illustrate the work of the embodiment of the present invention exemplified by 3.3V to the rechargeable battery between 4.2V by voltage power supply scope below
Make principle (referring to Fig. 6)：
Voltage power supply scope is connected to first end pin VBAT in 3.3V to the rechargeable battery between 4.2V, by mode detection mould
The control circuit mode of operation of block 504, circuit operating pattern have three kinds, and respectively BOOST (boosting) mode standard, BOOST (rise
Pressure) light-load mode, BUCK (decompression) pattern, in an initial condition, circuit operating pattern is set as BOOST by mode detection module
Mode standard；
Under BOOST mode standards and BOOST light-load modes, the second charging control switch 535 is disconnected, the first charging control
The conducting of system switch 534 so that major loop charging driving tube 531 turns on, and mode detection module 504 exports from control signal output
Low level so that the first switching switching tube 521 turns on, and the second switching switching tube 522 ends, and now manages loop error amplifier
EA01 accesses the second end pin VUSB feedback voltage, coordinates the triangular signal control pulse letter of triangular-wave generator RAMP outputs
Number generator U500 exports corresponding pulse signal, by pulse signal generator U500 control two management switch pipes 511,
512 alternate conductions；
Under BOOST mode standards and BOOST light-load modes, when the second management switch pipe 512 turns on, the first management switch
Pipe 511 ends, and now the public inductance 503 of buck stores electric energy, when the second management switch pipe 512 ends, the first management switch
Pipe 511 turns on, and is now powered together with rechargeable battery inductance 503 public with buck to the second end pin VUSB sides so that the second end
Pin VUSB output voltage realizes boosting output higher than the input voltage at first end pin VBAT；
Under BOOST mode standards, light-load mode feedback partial pressure controlling switch 523 is closed, now the second end pin VUSB
Output voltage is 5V, is now either removed the plug-in load at the second end pin VUSB, or connect at the second end pin VUSB
Enter an effective 5V input power, the output current at the second end pin VUSB can all be greatly reduced, if the second end pin VUSB
Locating external input power can be powered with holding load, and the BOOST power demands of circuit itself will be greatly reduced or even occur
Electric current opposite direction is poured in down a chimney, electric current by major loop charge driving tube 531 the public inductance 503 of buck the first public end VB meetings
The voltage drop less than first end pin VBAT is produced, major loop charging driving tube 531 is flowed through in the collection in real time of mode detection module 504
Current value, when the underloading detection comparator 701 in mode detection module detect the voltage higher than first end pin VBAT via
Voltage after divider resistance partial pressure, and major loop charging driving tube 531 electric current continue for some time it is below set in advance
Underloading current threshold, then circuit operating pattern is switched into BOOST light-load modes, and light-load mode feedback partial pressure controlling switch
523 conductings are to improve the second end pin VUSB electric resistance partial pressure feedback proportional, and then control wave generator U500 exports phase
The pulse signal answered, by the output voltage control at the second end pin VUSB in 4.5V；
Under BOOST light-load modes, if the underloading detection comparator 701 in mode detection module 504 detects main ring
The road charging both end voltage of driving tube 531 is higher than load voltage threshold value set in advance, then shows to flow through major loop charging driving tube
The increment of 531 electric current is higher than load current threshold set in advance, then shows have load to access at the second end pin VUSB, pattern
Detection module 504 now controls light-load mode feedback partial pressure control with circuit operating pattern is switched into BOOST mode standards
Switch 523 is disconnected, and the output voltage at the second end pin VUSB is improved to 5V by 4.5V；
Under BOOST light-load modes, if the port voltage detection comparator 703 in mode detection module 5044 detects
Voltage at second end pin VUSB is continued for some time higher than BUCK voltage thresholds (such as 4.65V) set in advance, then is shown
There is effective plant-grid connection higher than BUCK voltage thresholds at second end pin VUSB, mode detection module 504 is with working circuit
Pattern switching is to BUCK patterns；
Under BUCK patterns, mode detection module 504 exports high level from control signal output so that the first switching is opened
Close pipe 521 to end, the second switching switching tube 522 turns on, and now manages loop error amplifier EA01 access buck public powers
Feel 503 first public end VB feedback voltage, coordinate the triangular signal control wave of triangular-wave generator RAMP outputs
Generator U500 exports corresponding pulse signal, and two management switch pipes 511,512 are controlled by pulse signal generator U500
Alternate conduction；
Under BUCK patterns, when the second management switch pipe 512 ends, the first management switch pipe 511 turns on, now buck
The public storing electrical energy of inductance 503, when the second management switch pipe 512 turns on, the first management switch pipe 511 ends, now buck
Public inductance 503 is individually powered to the first public end VB sides of the public inductance 503 of buck so that the public inductance 503 of buck
The first public end VB sides output voltage be less than the second end pin VUSB sides input voltage, realize reduced output voltage；
Under BUCK patterns, effective power supply higher than 4.65V is connected at the second end pin VUSB, the after the power supply is removed
Voltage at two end pin VUSB can reduce, if mode detection module 504 detects that the voltage at the second end pin VUSB is reduced to
Load voltage threshold value (such as 4.0V) set in advance below after, mode detection module 504 is with switching circuit operating pattern
To BOOST light-load modes so that the output voltage at the second end pin VUSB gos up to 4.5V；
When being charged to rechargeable battery, there is effective plant-grid connection higher than BUCK voltage thresholds at the second end pin VUSB,
Circuit operating pattern is in BUCK patterns, will now turn on the second charging control switch 535, the first charging control switch 534
Disconnect so that major loop charging driving tube 531, mirror image driving tube 532 are connected to become mirror image matching relationship, and charge loop error is put
Big device EA03 two inputs are respectively connected to first end pin VBAT electric resistance partial pressure and reference voltage Vref, charge loop error
The grid of amplifier EA03 output control charging current controlling switch pipe 533, controlling stream overcharge current controlling switch pipe 533
Electric current, the electric current by mirror image driving tube 532 be mirrored to major loop charging driving tube 531 (be first end pin VBAT reality
Border charging current), when first end pin VBAT partial pressure is higher than reference voltage, charge loop error amplifier EA03 output electricity
Pressure drop is low to flow through the electric current of charging current controlling switch pipe 533 to reduce, flow through the electric current of major loop charging driving tube 531 also with
Reduce in proportion, when first end pin VBAT partial pressure is less than reference voltage, charge loop error amplifier EA03 output
Voltage increase flows through the electric current of charging current controlling switch pipe 533 to be lifted, and flows through the electric current of major loop charging driving tube 531
Lifted in proportion therewith, it is real so as to which first end pin VBAT charging voltage is controlled in charge voltage range set in advance
Now to the charging of rechargeable battery.
Claims (2)
1. a kind of voltage raising and reducing shares control circuit, it is characterised in that：Including the public inductance of buck, buck management loop,
First end pin, the second end pin；
The both ends of the public inductance of buck are respectively the first public end, the second public end；
The buck management loop includes triangular-wave generator, mode switch module, management loop error amplifier, PWM controls
Comparator processed, and two management switch pipes, it is described for controlling the pulse signal generator of two management switch pipe alternate conductions
Two management switch pipes are respectively the first management switch pipe, the second management switch pipe；
The first of the public inductance of buck public terminates to first end pin, the second public end of the public inductance of buck
One management switch pipe is connected to the second end pin, and is connected to ground through the second management switch pipe；
The control terminal of the first management switch pipe and the second management switch pipe is coupled with the pulse letter of pulse signal generator
Number output end；
One input termination reference voltage of the management loop error amplifier, another input input for feedback signal
End；
The output end of one input pipe nipple reason loop error amplifier of the PWM controls comparator, another input termination
The triangular signal output end of triangular-wave generator, the output of PWM control comparators terminate to the control of pulse signal generator
Signal input part；
The mode switch module includes the first switching switching tube, the second switching switching tube；
The feedback signal that second end pin connects the first switching switching tube to management loop error amplifier through divider resistance inputs
End, and the first switching switching tube is connect to management ring through light-load mode feedback partial pressure controlling switch, a feedback allotment resistance successively
The feedback signal input terminal of road error amplifier；
First public end of the public inductance of buck connects the second switching switching tube through divider resistance and put to management loop error
The feedback signal input terminal of big device；
The buck management loop also includes being used to control the first switching switching tube, the mould of the second switching switching tube alternate conduction
Formula detection module；
The mode detection module includes underloading detection comparator, port voltage detection comparator, mode detection and door；
First public end of one input termination public inductance of buck of the underloading detection comparator, another input warp
Divider resistance is connected to first end pin；
One of port voltage detection comparator input termination reference voltage, another input are connected to the through divider resistance
Two end pin；
One input of the mode detection and door terminates to the control terminal of BOOST light-load modes feedback partial pressure controlling switch, and
The output end of underloading detection comparator is connected to through a timing module, another input of mode detection and door terminates to port voltage
The output end of the output end of detection comparator, mode detection and door is connected to the control of the second switching switching tube through another timing module
End, the output end of another timing module are also connected to the control terminal of the first switching switching tube through a reverser.
2. voltage raising and reducing according to claim 1 shares control circuit, it is characterised in that：Also include Charge Management loop,
The Charge Management loop includes major loop charging driving tube, mirror image driving tube, charging current controlling switch pipe, charge loop and missed
Poor amplifier, the first charging control switch, the second charging control switch；
First public end of the public inductance of buck is connected to first end pin by major loop charging driving tube, and connects mirror successively
As driving tube, charging current controlling switch pipe to；
One of charge loop error amplifier input termination reference voltage, another input are connected to the through divider resistance
One end pin, the output of charge loop error amplifier terminate to the control terminal of charging current controlling switch pipe；
The control of the major loop charging driving tube terminates the first charging control switch to ground, and is connect through the second charging control switch
Charging current controlling switch pipe to ground；
The control termination charging current controlling switch pipe of the mirror image driving tube is connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310151374.9A CN104124868B (en) | 2013-04-27 | 2013-04-27 | Voltage raising and reducing shares control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310151374.9A CN104124868B (en) | 2013-04-27 | 2013-04-27 | Voltage raising and reducing shares control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104124868A CN104124868A (en) | 2014-10-29 |
| CN104124868B true CN104124868B (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310151374.9A Expired - Fee Related CN104124868B (en) | 2013-04-27 | 2013-04-27 | Voltage raising and reducing shares control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104124868B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425749A (en) * | 2007-10-29 | 2009-05-06 | 凌特公司 | Bidirectional power converters |
| CN103066836A (en) * | 2011-12-28 | 2013-04-24 | 成都芯源***有限公司 | Switching power supply circuit and control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007097252A (en) * | 2005-09-27 | 2007-04-12 | Nayuta:Kk | Power unit and its bidirectional step-up/step-down converter |
-
2013
- 2013-04-27 CN CN201310151374.9A patent/CN104124868B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425749A (en) * | 2007-10-29 | 2009-05-06 | 凌特公司 | Bidirectional power converters |
| CN103066836A (en) * | 2011-12-28 | 2013-04-24 | 成都芯源***有限公司 | Switching power supply circuit and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN104124868A (en) | 2014-10-29 |
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