CN207265858U - A kind of phase whole-bridging circuit of gamut Sofe Switch - Google Patents
A kind of phase whole-bridging circuit of gamut Sofe Switch Download PDFInfo
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- CN207265858U CN207265858U CN201721201205.1U CN201721201205U CN207265858U CN 207265858 U CN207265858 U CN 207265858U CN 201721201205 U CN201721201205 U CN 201721201205U CN 207265858 U CN207265858 U CN 207265858U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of phase whole-bridging circuit of gamut Sofe Switch; including for producing the phase-shift control circuit of PWM drive signal and drive circuit for driving switch pipe break-make; phase-shift control circuit uses Phase-shifted resonance control device; primary side of the first output terminal and the second output terminal of Phase-shifted resonance control device respectively through triode connection transformer; the secondary of transformer is connected with drive circuit; drive circuit connecting valve pipe, the current detecting end of Phase-shifted resonance control device are connected with the fault secure circuit that overvoltage protection is carried out for switch tube.The utility model can control the phase shifting angle of output voltage, enable power supply steady operation, and can realize the soft start of switching tube, have the advantages that soft loss is small and safe for operation, and the size of output voltage can be controlled in time when switching tube breaks down, ensure equipment normal use.
Description
Technical field
It the utility model is related to power electronics field, more particularly to a kind of phase-shifting full-bridge electricity of gamut Sofe Switch
Road.
Background technology
Full-bridge phase shifting circuit realizes Sofe Switch using the leakage inductance of switching tube parasitic parameter in itself and transformer, extensively should
Use in various large power supply devices.The circulation loss of existing full-bridge phase shifting circuit is big, and increases the loss of duty cycle,
In order to which duty-cycle loss is controlled circuits improvement in a rational scope, but lagging leg can be result in can not gamut reality
Existing Sofe Switch, and such a circuit, which is improved, needs the device of addition auxiliary circuit more, for reducing volume, increases power
Density has certain obstruction, and adds many circuit costs.In addition, this circuit is when over current fault occurs in switching tube,
Can not timely on-off switching tube, so as to cause circuit to damage, influence the normal use of equipment.
Utility model content
The purpose of this utility model is to provide a kind of phase whole-bridging circuit of gamut Sofe Switch, can control output electricity
The phase shifting angle of pressure, has the advantages that soft start and loss are small, and can control output in time when over current fault occurs in switching tube
The size of voltage, ensures equipment normal use.
To achieve the above object, the utility model adopts the following technical solution：
A kind of phase whole-bridging circuit of gamut Sofe Switch, including for producing the phase-shift control circuit of PWM drive signal
And the drive circuit for driving switch pipe break-make, the phase-shift control circuit use Phase-shifted resonance control device, the phase shift is humorous
Shake controller 1 pin through the first capacity earth, 1 pin of Phase-shifted resonance control device is also successively through first resistor and second resistance
Ground connection, first resistor connect 4 pins of Phase-shifted resonance control device with the common port of second resistance through 3rd resistor, and the phase shift is humorous
Shake 2 pins, 3 pins through the 4th resistance and the second capacitance connection Phase-shifted resonance control device successively of controller, Phase-shifted resonance control
3 pins of device connect the output terminal of the first operational amplifier through the 5th resistance, and the normal phase input end of the first operational amplifier is through the
Six resistance connect external control signal, and the inverting input of the first operational amplifier connects the output terminal of the first operational amplifier,
6 pins of the Phase-shifted resonance control device through the 3rd capacity earth, 19 pins of Phase-shifted resonance control device through the 4th capacity earth,
For 7 pins of the Phase-shifted resonance control device through the 7th resistance eutral grounding, the 7th resistance both ends are parallel with the 5th capacitance, and the phase shift is humorous
Shake controller 15 pins through the 8th resistance eutral grounding, the 8th resistance both ends are parallel with the 6th capacitance, the Phase-shifted resonance control device
16 pins through the 9th resistance eutral grounding, the 9th resistance both ends are parallel with the 7th capacitance, 10 pins of the Phase-shifted resonance control device
It is connected with 11 pins, 11 pins of Phase-shifted resonance control device are connected through the tenth resistance with 18 pins of Phase-shifted resonance control device, institute
State the 11 pins connection positive pole of Phase-shifted resonance control device, 11 pins of Phase-shifted resonance control device also through the 8th capacity earth,
8th capacitance both ends are parallel with the 9th capacitance, and 13 pins of the Phase-shifted resonance control device are through the 11st resistance respectively with the one or three
Pole pipe is connected with the ground level of the second triode, the collector connection positive pole of the first triode, the emitting stage of the first triode
One end of transformer primary side is connected, the first diode is parallel between the collector and emitting stage of first triode, it is described
The emitting stage of second triode is connected with the emitting stage of the first triode, the grounded collector of the second triode, the second triode
Emitting stage and collector between be parallel with the second diode, 14 pins of the Phase-shifted resonance control device are through the 12nd resistance point
Not Lian Jie the 3rd triode and the 4th triode ground level, the collector connection positive pole of the 3rd triode, the three or three
The other end of the emitting stage connection transformer primary side of pole pipe, is parallel with the between the collector and emitting stage of the 3rd triode
Three diodes, the emitting stage of the 4th triode are connected with the emitting stage of the 3rd triode, and the collector of the 4th triode connects
Ground, is parallel with the 4th diode, the secondary of the transformer and driving between the collector and emitting stage of the 4th triode
Circuit is connected, the drive circuit connecting valve pipe.
Preferably, the normal phase input end of first operational amplifier connects external control signal through the 6th resistance, described
External control signal is produced by sample circuit and optical coupling isolation circuit, and the sample circuit is arranged at switching tube, for gathering
The voltage of switching tube circuit, the signal of sample circuit collection are connected through optical coupling isolation circuit with the first operational amplifier.
Preferably, the sample circuit includes Hall sensor and the second operational amplifier, Hall sensor and switching tube
It is connected, the output terminal of the Hall sensor connects the normal phase input end of the second operational amplifier, the second fortune through the 13rd resistance
The normal phase input end of amplifier is calculated through the 14th resistance eutral grounding, the normal phase input end of second operational amplifier is also through the five or two
Pole pipe connects the output terminal of the second operational amplifier, and the inverting input of second operational amplifier is successively through the 15th resistance
And the tenth capacitance connection power cathode, the common end grounding of the 15th resistance and the tenth capacitance, second operational amplifier
Output terminal connects the normal phase input end of the 3rd operational amplifier through the 6th diode and the 16th resistance successively, the 6th diode with
The common port of 16th resistance connects the normal phase input end of the second operational amplifier, the 3rd operation amplifier through the 17th resistance
Output terminal of the normal phase input end of device also through the 3rd operational amplifier of the 11st capacitance connection, the 3rd operational amplifier it is anti-
Phase input terminal connects through the 19th resistance and the 20th resistance successively through the 18th resistance eutral grounding, the output terminal of the 3rd operational amplifier
The output terminal of Hall sensor is connect, the output terminal of the 3rd operational amplifier is produced through the 21st resistance and optical coupling isolation circuit
Raw external control signal.
Preferably, fault secure circuit is further included, the fault secure circuit includes four-operational amplifier, and the described 4th
The normal phase input end of operational amplifier through the 23rd resistance connecting fault signal supervisory instrument, four-operational amplifier it is anti-phase
Input terminal is connected with the output terminal of the 3rd operational amplifier, and the output terminal of four-operational amplifier is through the 22nd resistance and phase shift
5 pins of resonant controller are connected, and 5 pins of the Phase-shifted resonance control device are also through the 12nd capacity earth.
The utility model is simple in structure, easy to operate, by Phase-shifted resonance control device output drive signal, through transformer every
From and the work of drive circuit driving switch pipe, Phase-shifted resonance control device can reduce the voltage of switching tube, current stress, and reduction is opened
Pipe loss and circulation energy loss are closed, and lagging leg zero voltage switch and minimum can be realized in wider loading range
Duty-cycle loss, suitable for the Switching Power Supply of various power, realizes gamut Sofe Switch, Phase-shifted resonance control device is also associated with event
This fault-signal, when switching tube contact overcurrent or over-voltage fault, is connected to the electric current of Phase-shifted resonance control device by barrier protection circuit
Test side, it is low level to make Phase-shifted resonance control device output drive signal, and circuit is realized and is protected；In addition, the utility model is also
There is provided sample circuit, sample circuit gathers the current value on switching tube, and control signal input is formed after photoelectric isolating circuit
The error amplifier inverting input of Phase-shifted resonance control device, so that the phase shifting angle between controlling the output of Phase-shifted resonance control device
Size, enables power supply steady operation.
Brief description of the drawings
Fig. 1 is the circuit diagram of Phase-shifted resonance control described in the utility model；
Fig. 2 is the circuit diagram of sample circuit described in the utility model.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described reality
The section Example that example is only the utility model is applied, instead of all the embodiments.Based on the embodiment in the utility model,
Other all embodiments that those of ordinary skill in the art are obtained on the premise of creative work is not made, belong to this
The protection domain of utility model.
As shown in Figures 1 and 2, the phase whole-bridging circuit of a kind of gamut Sofe Switch described in the utility model, including with
In the phase-shift control circuit and drive circuit for driving switch pipe break-make that produce PWM drive signal, phase-shift control circuit is adopted
With Phase-shifted resonance control device U1,1 foot of Phase-shifted resonance control device U1（Reference voltage terminal）It is grounded through the first capacitance C1, phase-shifting resonance
1 foot of controller U1（Reference voltage terminal）Also it is grounded successively through first resistor R1 and second resistance R2, first resistor R1 and second
4 pins of the common port of resistance R2 through 3rd resistor R3 connection Phase-shifted resonance control devices U1（Error amplification region in-phase input end）,
2 pins of Phase-shifted resonance control device U1（Error amplifier output）Successively through the 4th resistance R4 and the second capacitance C2 connection phase shifts
3 pins of resonant controller U1（Error amplifier inverting input）, 3 pins of Phase-shifted resonance control device U1（Error amplifier
Inverting input）Output terminal through the 5th resistance R5 the first operational amplifiers of connection U2, the positive of the first operational amplifier U2 are defeated
Enter inverting input connection first computing of the end through the 6th resistance R6 connections external control signal V1, the first operational amplifier U2 to put
The output terminal of big device U2,6 pins of Phase-shifted resonance control device U1（Soft start end）It is grounded through the 3rd capacitance C3, Phase-shifted resonance control
19 pins of device U1（Slope end）It is grounded through the 4th capacitance C4,7 pins of Phase-shifted resonance control device U1（First output delay control
End）It is grounded through the 7th resistance R7, the 7th resistance R7 both ends are parallel with the 5th capacitance C5,15 pins of Phase-shifted resonance control device U1
（Second output delay control terminal）It is grounded through the 8th resistance R8, the 8th resistance R8 both ends are parallel with the 6th capacitance C6, phase-shifting resonance
16 pins of controller U1（Set of frequency end）It is grounded through the 9th resistance R9, the 9th resistance R9 both ends are parallel with the 7th capacitance C7,
10 pins of Phase-shifted resonance control device U1（Power voltage terminal）With 11 pins（Chip power supply power end）It is connected, Phase-shifted resonance control
11 pins of device U1（Chip power supply power end）18 pins through the tenth resistance R10 Yu Phase-shifted resonance control device U1（Steepness end）Phase
Even, 11 pins of Phase-shifted resonance control device U1（Chip power supply power end）Positive pole VCC is connected, Phase-shifted resonance control device U1's
11 pins（Chip power supply power end）Also it is grounded through the 8th capacitance C8, the 8th capacitance C8 both ends are parallel with the 9th capacitance C9, phase shift
13 pins of resonant controller U1（First output terminal）Through the 11st resistance R11 respectively with the first triode T1 and the second triode
The ground level of T2 is connected, the emitting stage connection transformation of collector connection the positive pole VCC, the first triode T1 of the first triode T1
One end of device B primary sides, is parallel with the first diode D1, the second triode T2 between the collector and emitting stage of the first triode T1
Emitting stage be connected with the emitting stage of the first triode T1, the grounded collector of the second triode T2, the hair of the second triode T2
Penetrate between level and collector and be parallel with the second diode D2,14 pins of Phase-shifted resonance control device U1（Second output terminal）Through the tenth
Two resistance R12 connect the ground level of the 3rd triode T3 and the 4th triode T4, the collector connection electricity of the 3rd triode T3 respectively
Source cathode VCC, the 3rd triode T3 emitting stage connection transformer B primary sides the other end, the collector of the 3rd triode T3 with
The 3rd diode D3 is parallel between emitting stage, the emitting stage of the 4th triode T4 is connected with the emitting stage of the 3rd triode T3,
The grounded collector of 4th triode T4, the 4th diode D4 is parallel between the collector and emitting stage of the 4th triode T4,
The secondary of transformer B is connected with drive circuit, drive circuit connecting valve pipe.
In addition, 5 pins of resonant controller U1（Current detecting end）Connection is put by the 22nd resistance R22, the 4th computing
The fault secure circuit of big device U5 and the 23rd resistance R23 compositions, the normal phase input end of four-operational amplifier U5 is through second
13 resistance R23 connecting fault signal supervisory instrument V2, the inverting input of four-operational amplifier U5 and the 4th operation amplifier
The output terminal of device U5 is connected, and the output terminal of four-operational amplifier U5 is through the 22nd resistance R22 and Phase-shifted resonance control device U1
5 pins（Current detecting end）It is connected, the output terminal of four-operational amplifier U5 is also grounded through the 12nd capacitance C12.Wherein, therefore
It is existing apparatus to hinder signal supervisory instrument and drive circuit, is repeated no more.
The normal phase input end of first operational amplifier U2 is through the 6th resistance R6 connection external control signal V1, outside control letter
Number V1 is produced by sample circuit and optical coupling isolation circuit, and sample circuit is arranged at switching tube, for gathering switching tube circuit
Current/voltage, the signal of sample circuit collection are connected through optical coupling isolation circuit with the first operational amplifier U2.
Sample circuit includes Hall sensor P, the second operational amplifier U3 and the 3rd operational amplifier U4, Hall sensor
P is connected with switching tube, and positive of the output terminal of Hall sensor P through the 13rd resistance R13 the second operational amplifiers of connection U3 is defeated
Enter end, the normal phase input end of the second operational amplifier U3 is grounded through the 14th resistance R14, and the positive of the second operational amplifier U3 is defeated
Enter output terminal of the end also through the 5th diode D5 the second operational amplifiers of connection U3, the inverting input of the second operational amplifier U3
Successively through the 15th resistance R15 and the tenth capacitance C10 connection power cathodes, the 15th resistance R15 and the tenth capacitance C10's is public
End ground connection, the output terminal of the second operational amplifier U3 is successively through the 3rd computing of the 6th diode D6 and the 16th resistance R16 connections
The normal phase input end of amplifier U4, the 6th diode D6 are connected with the common port of the 16th resistance R16 through the 17th resistance R17
The normal phase input end of two operational amplifier U3, the normal phase input end of the 3rd operational amplifier U4 is also through the 11st capacitance C11 connections
The output terminal of 3rd operational amplifier U4, the inverting input of the 3rd operational amplifier U4 are grounded through the 18th resistance R18, and the 3rd
The output through the 19th resistance R19 and the 20th resistance R20 connection Hall sensors P successively of the output terminal of operational amplifier U4
End, the output terminal of the 3rd operational amplifier U4 produce external control signal through the 21st resistance R21 and optical coupling isolation circuit.
When the utility model at work, resonant controller U1 produce drive signal, through the first triode, the second triode,
After 3rd triode and the amplification of the 4th triode, then after transformer isolation, work through drive circuit driving switch pipe, Hall passes
Sensor gathers the voltage of switching tube, and control signal is formed after sampled circuit and photoelectric isolating circuit, inputs Phase-shifted resonance control
The error amplifier inverting input of device, so that the phase shifting angle size between controlling the output of Phase-shifted resonance control device, makes power supply
Being capable of steady operation；When switching tube contact overcurrent or over-voltage fault, this fault-signal is connected to the electricity of Phase-shifted resonance control device
Test side is flowed, it is low level to make Phase-shifted resonance control device output drive signal, and circuit is realized and is protected.
The utility model is simple in structure, easy to operate, can control the phase shifting angle of output voltage, power supply is stablized work
Make, and can realize the soft start of switching tube, have the advantages that soft loss is small and safe for operation, and event can occur in switching tube
The size of output voltage is controlled during barrier in time, ensures equipment normal use.
Claims (4)
- A kind of 1. phase whole-bridging circuit of gamut Sofe Switch, it is characterised in that：Including the phase shift for producing PWM drive signal Control circuit and the drive circuit for driving switch pipe break-make, the phase-shift control circuit use Phase-shifted resonance control device, institute 1 pin of Phase-shifted resonance control device is stated through the first capacity earth, 1 pin of Phase-shifted resonance control device also successively through first resistor and Second resistance is grounded, and first resistor connects 4 pins of Phase-shifted resonance control device, institute with the common port of second resistance through 3rd resistor State 2 pins of Phase-shifted resonance control device, 3 pins through the 4th resistance and the second capacitance connection Phase-shifted resonance control device successively, phase shift 3 pins of resonant controller connect the output terminal of the first operational amplifier through the 5th resistance, and the positive of the first operational amplifier is defeated Enter end and connect external control signal through the 6th resistance, the inverting input of the first operational amplifier connects the first operational amplifier Output terminal, 6 pins of the Phase-shifted resonance control device are through the 3rd capacity earth, and 19 pins of Phase-shifted resonance control device are through the 4th electricity Hold ground connection, 7 pins of the Phase-shifted resonance control device are parallel with the 5th capacitance through the 7th resistance eutral grounding, the 7th resistance both ends, institute 15 pins of Phase-shifted resonance control device are stated through the 8th resistance eutral grounding, the 8th resistance both ends are parallel with the 6th capacitance, and the phase shift is humorous Shake controller 16 pins through the 9th resistance eutral grounding, the 9th resistance both ends are parallel with the 7th capacitance, the Phase-shifted resonance control device 10 pins be connected with 11 pins, 18 pins of 11 pins through the tenth resistance Yu Phase-shifted resonance control device of Phase-shifted resonance control device It is connected, the 11 pins connection positive pole of the Phase-shifted resonance control device, 11 pins of Phase-shifted resonance control device are also through the 8th electricity Hold ground connection, the 8th capacitance both ends are parallel with the 9th capacitance, and 13 pins of the Phase-shifted resonance control device are distinguished through the 11st resistance It is connected with the ground level of the first triode and the second triode, the collector connection positive pole of the first triode, the first triode Emitting stage connection transformer primary side one end, be parallel with the one or two pole between the collector and emitting stage of first triode Pipe, the emitting stage of second triode are connected with the emitting stage of the first triode, the grounded collector of the second triode, and second The second diode is parallel between the emitting stage and collector of triode, 14 pins of the Phase-shifted resonance control device are through the 12nd Resistance connects the ground level of the 3rd triode and the 4th triode respectively, and the collector of the 3rd triode connects positive pole, The other end of the emitting stage connection transformer primary side of 3rd triode, between the collector and emitting stage of the 3rd triode simultaneously The 3rd diode is associated with, the emitting stage of the 4th triode is connected with the emitting stage of the 3rd triode, the collection of the 4th triode Electrode is grounded, and the 4th diode, the secondary of the transformer are parallel between the collector and emitting stage of the 4th triode It is connected with drive circuit, the drive circuit connecting valve pipe.
- A kind of 2. phase whole-bridging circuit of gamut Sofe Switch as claimed in claim 1, it is characterised in that：First computing The normal phase input end of amplifier connects external control signal through the 6th resistance, and the external control signal is by sample circuit and optocoupler Isolation circuit produces, and the sample circuit is arranged at switching tube, for gathering the voltage of switching tube circuit, sample circuit collection Signal be connected through optical coupling isolation circuit with the first operational amplifier.
- A kind of 3. phase whole-bridging circuit of gamut Sofe Switch as claimed in claim 2, it is characterised in that：The sample circuit It is connected including Hall sensor and the second operational amplifier, Hall sensor with switching tube, the output terminal of the Hall sensor The normal phase input end of the second operational amplifier is connected through the 13rd resistance, the normal phase input end of the second operational amplifier is through the 14th Resistance eutral grounding, the normal phase input end of second operational amplifier also connect the output of the second operational amplifier through the 5th diode End, the inverting input of second operational amplifier is successively through the 15th resistance and the tenth capacitance connection power cathode, and the tenth The common end grounding of five resistance and the tenth capacitance, the output terminal of second operational amplifier is successively through the 6th diode and the tenth The common port of the normal phase input end of six resistance the 3rd operational amplifier of connection, the 6th diode and the 16th resistance is through the 17th electricity The normal phase input end of resistance the second operational amplifier of connection, the normal phase input end of the 3rd operational amplifier is also through the 11st capacitance Connecting the output terminal of the 3rd operational amplifier, the inverting input of the 3rd operational amplifier is through the 18th resistance eutral grounding, and The output terminal of the three operational amplifiers output terminal through the 19th resistance and the 20th resistance connection Hall sensor successively, described the The output terminal of three operational amplifiers produces external control signal through the 21st resistance and optical coupling isolation circuit.
- A kind of 4. phase whole-bridging circuit of gamut Sofe Switch as claimed in claim 3, it is characterised in that：Further include failure guarantor Protection circuit, the fault secure circuit include four-operational amplifier, and the normal phase input end of the four-operational amplifier is through 23 resistance connecting fault signal supervisory instruments, the inverting input of four-operational amplifier are defeated with the 3rd operational amplifier Outlet is connected, and the output terminal of four-operational amplifier is connected through the 22nd resistance with 5 pins of Phase-shifted resonance control device, described 5 pins of Phase-shifted resonance control device are also through the 12nd capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721201205.1U CN207265858U (en) | 2017-09-19 | 2017-09-19 | A kind of phase whole-bridging circuit of gamut Sofe Switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721201205.1U CN207265858U (en) | 2017-09-19 | 2017-09-19 | A kind of phase whole-bridging circuit of gamut Sofe Switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207265858U true CN207265858U (en) | 2018-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721201205.1U Active CN207265858U (en) | 2017-09-19 | 2017-09-19 | A kind of phase whole-bridging circuit of gamut Sofe Switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207265858U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233569A (en) * | 2019-06-14 | 2019-09-13 | 北京物资学院 | Energy supply startup control circuit and its control method |
| CN111865097A (en) * | 2020-08-30 | 2020-10-30 | 杭州派尼澳电子科技有限公司 | ZVS phase-shifted full-bridge DC-DC circuit |
-
2017
- 2017-09-19 CN CN201721201205.1U patent/CN207265858U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233569A (en) * | 2019-06-14 | 2019-09-13 | 北京物资学院 | Energy supply startup control circuit and its control method |
| CN110233569B (en) * | 2019-06-14 | 2024-02-09 | 北京物资学院 | Power supply start control circuit and control method thereof |
| CN111865097A (en) * | 2020-08-30 | 2020-10-30 | 杭州派尼澳电子科技有限公司 | ZVS phase-shifted full-bridge DC-DC circuit |
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