CN103795229B - Drive circuit of double-tube forward synchronous rectification circuit - Google Patents
Drive circuit of double-tube forward synchronous rectification circuit Download PDFInfo
- Publication number
- CN103795229B CN103795229B CN201410038844.5A CN201410038844A CN103795229B CN 103795229 B CN103795229 B CN 103795229B CN 201410038844 A CN201410038844 A CN 201410038844A CN 103795229 B CN103795229 B CN 103795229B
- Authority
- CN
- China
- Prior art keywords
- drive circuit
- audion
- circuit
- tube
- synchronous rectification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Rectifiers (AREA)
Abstract
The embodiment of the invention discloses a driving circuit of a double-tube forward synchronous rectification circuit, which comprises a double-tube forward conversion network at the primary side of a transformer and a synchronous rectification conversion network at the secondary side of the transformer, wherein the driving circuit of the double-tube forward synchronous rectification circuit comprises a double-tube driving circuit for driving the double-tube forward conversion network and a follow current tube driving circuit for driving the synchronous rectification conversion network, the double-tube driving circuit comprises an adjusting circuit for adjusting the turn-on time of an input signal of the double-tube driving circuit, and/or the follow current tube driving circuit comprises a self-locking discharge circuit for quickly releasing the current in a follow current tube in the synchronous rectification conversion network. The invention can realize the dead zone adjustment of the drive of the rectifier tube and the follow current tube and simultaneously realize the quick turn-off of the synchronous follow current tube.
Description
Technical field
The present invention relates to a kind of drive circuit, particularly relate to driving of a kind of double tube positive exciting circuit of synchronous rectification
Galvanic electricity road.
Background technology
Specialty LED display has become main flow with LED illumination at present, and product had been walked the most in recent years
To internationalization, to quality, power density, the efficiency of power supply of product and use the aspects such as environmental requirement
The most harsh.Along with the enforcement of new national standard, prominent domestic LED display manufacturer also will imitate at power supply
The each side such as rate, ultra-thin, environment, especially pay close attention to.
To this end, high efficiency, ultra-thin, small size, the product of low middle power are current LED power main flows
Product.In order to improve efficiency, be generally selected Sofe Switch topology (LLC half-bridge resonance, asymmetric half
Bridge, double tube positive exciting) add output synchronous rectification (self-powered synchronous rectification, IC control chip synchronous rectification,
It drives formula synchronous rectification) mode.
Use output synchronous rectification, no matter use which kind of mode, all need power supply reliability high stability strong.
Therefore being accomplished by overcoming the common of rectifier tube and continued flow tube, i.e. when rectifier tube is opened, afterflow is not the most entered
Enter off state, the phenomenon that at this moment two pipes simultaneously turn on.
For apparent expression, introduce the double tube positive exciting of prior art below in conjunction with Fig. 1 to Fig. 3
Circuit of synchronous rectification and drive circuit thereof.
Fig. 1 is prior art double tube positive exciting synchronous rectification topological circuit schematic diagram.As it is shown in figure 1, its
Limit, Central Plains is double tube positive exciting converting network, and secondary is synchronous rectification converting network.Former limit Q300, Q302,
D300, D302 constitute double tube positive exciting topological structure；VBulk is AC rectification filtering voltage interface;
DRVA, DRVAA be the driving of upper pipe, DRVB, CS be that down tube drives.Secondary Q403, Q401,
LB400, EC400, EC401 form MOSFET synchronous rectification network；Synchronous rectifier Q403 drives
The dynamic employing self-driven mode of main transformer TB1 supplies；Synchronous freewheeling pipe Q401 drives and uses former limit
Pwm signal is through continued flow tube drive circuit isolating transformer T301A transmission supply, drive circuit.
Fig. 2 is prior art two-tube drive circuit schematic diagram.
Wherein DRV is to be provided pwm signal by control chip, through R305, DB300, Q301,
The totem pole drive circuit of Q304 composition is again by driving isolating transformer T300A to be divided into identical two
Winding provides identical driving signal to master power switch pipe Q300, Q302 of double tube positive exciting；
Fig. 3 is prior art continued flow tube drive circuit schematic diagram.
DRV is to be provided pwm signal by control chip, through R327, RC301, C307, Q312,
Composition is provided back to pwm signal is counter, RC300, Q309, Q310, the totem of composition
Post drive circuit is again by driving isolating transformer T301A vice-side winding to carry to continued flow switch pipe Q401
For driving signal.
The shortcoming that prior art exists mainly has:
1, the dead band adjustment of rectifier tube and the driving of continued flow tube can not be carried out, carry start or dynamic at output band
State load, can being total to of the uncontrollable rectifier tube of random time of occurrence and continued flow tube when output short-circuit
Logical phenomenon, causes efficiency to reduce, and can make the short circuit in winding of secondary time serious, damages main switch or defeated
Go out synchronous rectifier.
2, utilizing the load that vice-side winding reversely produces to carry out the shutoff of continued flow tube, turn-off speed is slow,
There is serious potential safety hazard.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, it is provided that a kind of double tube positive exciting synchronous rectification
The drive circuit of circuit.The Dead Time of rectifier tube and the driving of continued flow tube can be adjusted and arranges,
And the continued flow tube of output can be rapidly switched off.
In order to solve above-mentioned technical problem, embodiments provide a kind of double tube positive exciting synchronous rectification
The drive circuit of circuit, described double tube positive exciting circuit of synchronous rectification includes being in the two-tube of transformer primary side
Forward conversion network and the synchronous rectification converting network being in transformer secondary, described double tube positive exciting synchronizes
The drive circuit of rectification circuit includes the two-tube drive circuit for driving described double tube positive exciting converting network
With the continued flow tube drive circuit for driving described synchronous rectification converting network, described two-tube drive circuit
Including the adjustment circuit of the input signal service time for adjusting described two-tube drive circuit, and/or institute
State continued flow tube drive circuit and include in the quickly described synchronous rectification converting network of release electric in continued flow tube
The self-locking discharge circuit of stream.
Further, the input signal of described two-tube drive circuit is the PWM letter provided by control chip
Number, described service time refers to the time that the rising edge of described pwm signal starts.
Further, described two-tube drive circuit includes the first totem pole drive circuit, first drive every
From transformator；The input signal of described two-tube drive circuit inputs after the adjustment of described adjustment circuit
First totem pole drive circuit, then drives isolating transformer by described first, and by described transformation
The vice-side winding output signal of device, provides for described double tube positive exciting converting network and drives signal.
Further, described double tube positive exciting converting network includes two master power switch pipes, described two-tube
The input signal of drive circuit, after described first drives isolating transformer, is divided into two identical windings,
It is respectively described master power switch pipe and driving signal is provided.
Further, described adjustment circuit includes the first electric capacity, the first resistance and the first audion；Need
Signal to be adjusted inputs described adjustment circuit, described first electricity by one end of described first electric capacity
The other end held is by described first resistance eutral grounding, and the base stage of described first audion is connected to described the
Between one electric capacity and the first resistance, the emitter grounding of described first audion, described first audion
Colelctor electrode is connected with rear stage circuit, and the signal after described adjustment the regulation of electrical circuit passes through the described 1st
The colelctor electrode of pole pipe is passed to rear stage circuit.
Further, described first audion is NPN type triode.
Further, described continued flow tube drive circuit uses the pwm signal of described control chip output to make
For input signal.
Further, described continued flow tube drive circuit include negater circuit, the second totem pole drive circuit,
Second drives isolating transformer；The input signal of described continued flow tube drive circuit is through described negater circuit
After Fan Xiang, through described second totem pole drive circuit, then drive isolating transformer by described second,
Eventually pass described self-locking discharge circuit and provide driving for the continued flow tube in described synchronous rectification converting network
Signal.
Further, described self-locking discharge circuit includes the second audion, the 3rd audion, the one or two
Pole is managed, the second resistance；The emitter-base bandgap grading of described second audion is as the input of described self-locking discharge circuit
To receive signal, the colelctor electrode of described second audion connects the base stage of described 3rd audion, described
The emitter grounding of the 3rd audion, the emitter-base bandgap grading of described 3rd audion is connected by described first diode
The base stage of described 3rd audion, is used for providing conducting positive between described 3rd transistor base and emitter-base bandgap grading
Voltage, the base stage of colelctor electrode described second audion of connection of described 3rd audion, the described 2nd 3
The base stage of pole pipe connects the emitter-base bandgap grading of described second audion, described two or three pole by described second resistance
The emitter-base bandgap grading of pipe is as the outfan of described continued flow tube drive circuit.
Further, described second audion is PNP type triode, and described 3rd audion is NPN
Type audion.
Implement the embodiment of the present invention, have the advantages that
1, the present invention adjusts, with simple RC device, the time that the pwm signal rising edge of input starts,
Thus the Dead Time of the driving of tunable integer flow tube and continued flow tube.
2, rapidly switching off of continued flow tube is realized.
3, the common phenomenon of synchronous rectification reduces.
4, synchronous rectification switch loss reduces.
5, reduce between synchronous rectifier and synchronous freewheeling pipe because of the common instability caused.
6, the efficiency of overall double tube positive exciting circuit of synchronous rectification gets a promotion.
7, present invention scheme compared to existing technology, the scope of application is wider.
Accompanying drawing explanation
Fig. 1 is prior art double tube positive exciting synchronous rectification topological circuit schematic diagram；
Fig. 2 is prior art two-tube drive circuit schematic diagram；
Fig. 3 is prior art continued flow tube drive circuit schematic diagram；
Fig. 4 is the present invention two-tube drive circuit schematic diagram；
Fig. 5 is continued flow tube drive circuit schematic diagram of the present invention；
Fig. 6 is the drive circuit schematic diagram of double tube positive exciting circuit of synchronous rectification of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this
Invention is described in further detail.
Drive circuit of the present invention is applicable to double tube positive exciting circuit of synchronous rectification, and described double tube positive exciting is same
Step rectification circuit includes the double tube positive exciting converting network being in transformer primary side and is in transformer secondary
Synchronous rectification converting network.The drive circuit of double tube positive exciting circuit of synchronous rectification of the present invention includes for driving
Move the two-tube drive circuit of described double tube positive exciting converting network and be used for driving described synchronous rectification to convert net
The continued flow tube drive circuit of continued flow tube in network.
Fig. 4 is the present invention two-tube drive circuit schematic diagram.As it can be seen, the PWM provided by control chip
Signal accesses described two-tube drive circuit as input signal DRV.Described input signal first pass around by
What the first electric capacity C1, the first resistance R1 and the first audion Q1 were constituted is used for adjusting input PWM letter
The adjustment circuit of number rising edge time started, then through by resistance R305, diode DB300, three poles
First totem pole drive circuit of pipe Q301 and audion Q304 composition, then drives by described first
Dynamic isolating transformer T1 is divided into two identical windings, for opening up to double tube positive exciting synchronous rectification shown in Fig. 1
The master power switch pipe flutterring middle double tube positive exciting provides driving signal.Concrete, wherein circuit shown in Fig. 4
In DRVA and DRVAA be limit, Fig. 1 Central Plains double tube positive exciting circuit upper pipe Q300 provide drive letter
Number, DRVB and CS in circuit shown in Fig. 4 is down tube Q302 of limit, Fig. 1 Central Plains double tube positive exciting circuit
There is provided and drive signal.
The input signal of described two-tube drive circuit, described adjustment circuit and the tool of described totem-pote circuit
Body annexation is as follows: described totem pole drive circuit is by resistance R305, diode DB300, three poles
Pipe Q301 and audion Q304 composition, described input signal is through by described resistance R305 and described
Audion Q301 and the base stage of audion Q304 is sent into after the circuit that diode DB300 parallel connection is constituted,
The colelctor electrode of described audion Q301 is connected to power supply VCC by a resistance, audion Q301's
Emitter-base bandgap grading connects the emitter-base bandgap grading of described audion Q304, the grounded collector of described audion Q304.Described
Adjust circuit to be made up of the first audion Q1 of the first electric capacity C1, the first resistance R1 and NPN type,
One end of described first electric capacity receives the pwm signal exported by control chip, and the other end connects described respectively
One end of first resistance R1 and the base stage of described first audion Q1, described first resistance and described
Emitter-base bandgap grading all ground connection of one audion Q1, the colelctor electrode of described first audion Q1 connects described totem pole
The base stage of the described audion Q304 of circuit.By such mode, described adjustment circuit will adjust
The input signal of rise time is delivered to next stage circuit.Wherein, the described rise time refers to pwm signal
The time that rising edge starts.
By two-tube drive circuit conventional in the prior art adding by the first electric capacity C1, the first electricity
The adjustment circuit that resistance R1 and the first audion Q1 is constituted, can be to inputting described two-tube drive circuit
The rise time of pwm signal is adjusted, thus realizes rectifier tube and the dead band of the driving of continued flow tube
Time is adjusted.The principle realizing this function is as follows:
When first pulse of described input signal PWM rises next, due to described first electric capacity C1's
Existing, signal is added on described first resistance R1, when pulse voltage value reaches described first audion
During the turn-on threshold of Q1, described first audion Q1 conducting, described input signal PWM passes through institute
Stating the first audion Q1 and import the earth, the most described pwm signal does not access rear class totem-pote circuit.
Along with described first electric capacity C1 fully charged after, described first audion Q1 enters again cut-off state, institute
State input signal PWM to input normally in totem-pote circuit.So, input pwm signal is upper
The time of liter opened with the main power being transferred to double tube positive exciting circuit in the moment of incoming described two-tube drive circuit
Close and exist for a time difference between the moment of pipe.Drive it is to say, rectifier tube drives with continued flow tube
Conducting with turn off time on there is described time difference.Simultaneously by regulate described first electric capacity C1,
First resistance R1 and the parameter of the first audion Q1, can adjust described time extent, it is to avoid
In described double tube positive exciting circuit of synchronous rectification, rectifier tube and continued flow tube is common.As shown in Figure 2 existing
The two-tube drive circuit of technology does not have this adjustable time difference.
It should be pointed out that, that the spirit of the present invention is to utilize simple resistance, electric capacity, audion original paper real
Now the pwm signal rise time of input is adjusted, is delivered to next stage circuit the most again, this
Bright protection domain should not be limited by totem-pote circuit structure described above.
Fig. 5 is continued flow tube drive circuit schematic diagram of the present invention.The pwm signal provided by control chip is made
For input signal DRV input described continued flow tube drive circuit, through by R327, RC301, C307,
Negater circuit that Q312 is constituted reversely after, then be made up of RC300, Q309, Q310 through described
Second totem pole drive circuit, is then passed through described second and drives isolating transformer T2 vice-side winding,
After through by the second audion Q2, the 3rd audion Q3, first diode D1, the second resistance R2
The self-locking discharge circuit constituted provides for the continued flow tube in described synchronous rectification converting network and drives signal.
Concrete, the DRVD2 in circuit shown in Fig. 5 is continuing in secondary synchronous rectification converting network in Fig. 1
Stream switching tube Q401 provides and drives signal.
Described self-locking discharge circuit includes positive-negative-positive the second audion Q2, NPN type the 3rd audion Q3,
Second resistance R2, the first diode D1；The emitter-base bandgap grading of described second audion Q2 is put as described self-locking
The input of electricity circuit is to receive signal, and the colelctor electrode of described second audion Q2 connects the described 3rd 3
The base stage of pole pipe Q3, the emitter grounding of described 3rd audion Q3, described 3rd audion Q3's
Emitter-base bandgap grading connects the base stage of described 3rd audion Q3 by described first diode D1, is used for providing institute
State conducting voltage positive between the 3rd audion Q3 base stage and emitter-base bandgap grading, the current collection of described 3rd audion Q3
Pole connects the base stage of described second audion, and the base stage of described second audion Q2 is by described second electricity
Resistance R2 connects the emitter-base bandgap grading of described second audion Q2, and the emitter-base bandgap grading of described second audion Q2 is as institute
State the outfan of continued flow tube drive circuit for for the afterflow in secondary synchronous rectification converting network in Fig. 1
Switching tube Q401 provides and drives signal.
By continued flow tube drive circuit conventional in the prior art adds by the second audion Q2, the
The self-locking discharge circuit that three audion Q3, the second resistance R2, first diode D1 is constituted, can make
Obtain the described grid of continued flow switch pipe Q401 thoroughly to release with the electric charge of source electrode, thus realize fast and reliable
Shutoff described continued flow switch pipe Q401.The principle realizing this function is as follows:
Input signal is delivered to secondary by isolating transformer T2, under on the voltage on secondary coil just
Time negative, the pwm signal of input is directly exported to described afterflow by electric capacity C409, resistance R427
Pipe Q401, the VBE of described 3rd audion Q3 are in backward voltage, described second audion Q2
VBE be in forward voltage, at the most described 3rd audion Q3 and described second audion Q2
In cut-off state；When lower timing negative on the voltage on secondary coil is due to the existence of the first diode D1,
The VBE of described 3rd audion Q3 have positive 0.7V conducting voltage can, described 3rd audion
Q3 and the second audion Q2 constitutes an interactive self-locking manner.Described 3rd audion Q3 opens
Leading to makes described second audion Q2 along with open-minded, and electric charge continued flow tube grid and source electrode deposited faster is fast
Speed bleeds off, and reaches quick closedown.And the continued flow tube drive circuit of prior art, it is to utilize vice-side winding
The negative pressure reversely produced turns off, and the speed that this mode continued flow tube is closed is slower.
To sum up, the present invention include two-tube drive circuit and continued flow tube rectification circuit two-part two-tube just
Exciting synchronous rectification circuit is as shown in Figure 6.
The above is the preferred embodiment of the present invention, it is noted that general for the art
For logical technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvement and
Retouching, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a drive circuit for double tube positive exciting circuit of synchronous rectification, described double tube positive exciting synchronous rectification electricity
Road includes being in the double tube positive exciting converting network of transformer primary side and being in the synchronous rectification of transformer secondary
Converting network, the drive circuit of described double tube positive exciting circuit of synchronous rectification includes for driving described two-tube
The two-tube drive circuit of forward conversion network and for driving the continued flow tube of described synchronous rectification converting network
Drive circuit, it is characterised in that described two-tube drive circuit includes for adjusting described two-tube driving electricity
The adjustment circuit of the input signal service time on road；
Described adjustment circuit includes the first electric capacity, the first resistance and the first audion；Need controlled
Signal inputs described adjustment circuit, the other end of described first electric capacity by one end of described first electric capacity
By described first resistance eutral grounding, the base stage of described first audion is connected to described first electric capacity and
Between one resistance, the emitter grounding of described first audion, the colelctor electrode of described first audion with after
Stage circuit is connected, the current collection by described first audion of the signal after described adjustment the regulation of electrical circuit
Pole is passed to rear stage circuit.
Drive circuit the most according to claim 1, it is characterised in that described two-tube drive circuit
Input signal is the pwm signal provided by control chip, and described service time refers to described pwm signal
Time of starting of rising edge.
Drive circuit the most according to claim 1, it is characterised in that described two-tube drive circuit bag
Including the first totem pole drive circuit, first drives isolating transformer；The input of described two-tube drive circuit
Signal inputs the first totem pole drive circuit after the adjustment of described adjustment circuit, then by described
The first vice-side winding output signal driving isolating transformer, provides for described double tube positive exciting converting network
Drive signal.
Drive circuit the most according to claim 3, it is characterised in that described double tube positive exciting conversion net
Network includes that two master power switch pipes, the input signal of described two-tube drive circuit drive through described first
After dynamic isolating transformer, being divided into two identical windings, the most described master power switch pipe provides and drives
Signal.
Drive circuit the most according to claim 1, it is characterised in that described first audion is
NPN type triode.
Drive circuit the most according to claim 2, it is characterised in that described continued flow tube drive circuit
Use the pwm signal that described control chip exports as input signal.
Drive circuit the most according to claim 1, it is characterised in that described continued flow tube drive circuit
Including the self-locking electric discharge electricity for quickly discharging electric current in continued flow tube in described synchronous rectification converting network
Road；Described continued flow tube drive circuit includes negater circuit, the second totem pole drive circuit, the second driving
Isolating transformer；The input signal of described continued flow tube drive circuit through described negater circuit reversely after,
Through described second totem pole drive circuit, then drive isolating transformer by described second, after warp
Cross described self-locking discharge circuit and provide driving signal for the continued flow tube in described synchronous rectification converting network.
Drive circuit the most according to claim 7, it is characterised in that described self-locking discharge circuit bag
Include the second audion, the 3rd audion, the first diode, the second resistance；Described second audion
Emitter-base bandgap grading as the input of described self-locking discharge circuit to receive signal, the current collection of described second audion
The base stage of described 3rd audion of pole connection, the emitter grounding of described 3rd audion, the described 3rd 3
The emitter-base bandgap grading of pole pipe connects the base stage of described 3rd audion by described first diode, is used for providing institute
Stating conducting voltage positive between the 3rd transistor base and emitter-base bandgap grading, the colelctor electrode of described 3rd audion connects
The base stage of described second audion, the base stage of described second audion connects institute by described second resistance
Stating the emitter-base bandgap grading of the second audion, the emitter-base bandgap grading of described second audion is as described continued flow tube drive circuit
Outfan.
Drive circuit the most according to claim 8, it is characterised in that described second audion is PNP
Type audion, described 3rd audion is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038844.5A CN103795229B (en) | 2014-01-26 | 2014-01-26 | Drive circuit of double-tube forward synchronous rectification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038844.5A CN103795229B (en) | 2014-01-26 | 2014-01-26 | Drive circuit of double-tube forward synchronous rectification circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103795229A CN103795229A (en) | 2014-05-14 |
| CN103795229B true CN103795229B (en) | 2016-09-14 |
Family
ID=50670639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410038844.5A Active CN103795229B (en) | 2014-01-26 | 2014-01-26 | Drive circuit of double-tube forward synchronous rectification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103795229B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269997B (en) * | 2014-10-11 | 2017-09-26 | 南京航空航天大学 | A kind of adjustable transformer isolation complementary drive circuit in dead band |
| CN106877675A (en) * | 2017-03-30 | 2017-06-20 | 北京精密机电控制设备研究所 | A kind of normal shock switching power circuit two-tube in parallel of wide range input |
| TWI677178B (en) * | 2017-06-27 | 2019-11-11 | 全漢企業股份有限公司 | Rectifier and associated rectifying circuit |
| CN107196486A (en) * | 2017-07-13 | 2017-09-22 | 无锡市金赛德电子有限公司 | A kind of active and standby input power circuit |
| CN107453595B (en) * | 2017-08-17 | 2019-07-02 | 国家电网公司 | Serial IGBT Synchronous Control Device Based on Synchronous Power Technology |
| CN108880202A (en) * | 2018-07-05 | 2018-11-23 | 广州视源电子科技股份有限公司 | Drive circuit and variable frequency power supply |
| CN110474539A (en) * | 2019-08-23 | 2019-11-19 | 佛山市格正电源科技有限公司 | A kind of novel isolated drive circuit |
| CN114123758B (en) * | 2021-11-29 | 2023-10-10 | 珠海格力电器股份有限公司 | AC-DC converter and control method for AC-DC converter |
| CN117674606A (en) * | 2023-11-02 | 2024-03-08 | 山东航天电子技术研究所 | A nationally produced synchronous rectification and drive circuit suitable for GaN power devices |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6370044B1 (en) * | 2000-11-30 | 2002-04-09 | Delta Electronics, Inc. | Synchronous rectifier circuit |
| CN1379534A (en) * | 2002-01-01 | 2002-11-13 | 艾默生网络能源有限公司 | Synchronous rectifying drive circuit and method of DC/DC converter |
| US6563719B1 (en) * | 2002-04-09 | 2003-05-13 | Bel-Fuse, Inc. | Self-driven synchronous rectification scheme |
| CN1481066A (en) * | 2003-06-19 | 2004-03-10 | 艾默生网络能源有限公司 | BUCK convertor containing synchronous rectitication drive circuit |
| CN103414354A (en) * | 2013-07-16 | 2013-11-27 | 燕山大学 | Power switch device pulse transformer isolation driving circuit |
-
2014
- 2014-01-26 CN CN201410038844.5A patent/CN103795229B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6370044B1 (en) * | 2000-11-30 | 2002-04-09 | Delta Electronics, Inc. | Synchronous rectifier circuit |
| CN1379534A (en) * | 2002-01-01 | 2002-11-13 | 艾默生网络能源有限公司 | Synchronous rectifying drive circuit and method of DC/DC converter |
| US6563719B1 (en) * | 2002-04-09 | 2003-05-13 | Bel-Fuse, Inc. | Self-driven synchronous rectification scheme |
| CN1481066A (en) * | 2003-06-19 | 2004-03-10 | 艾默生网络能源有限公司 | BUCK convertor containing synchronous rectitication drive circuit |
| CN103414354A (en) * | 2013-07-16 | 2013-11-27 | 燕山大学 | Power switch device pulse transformer isolation driving circuit |
Non-Patent Citations (1)
| Title |
|---|
| 一种新颖的同步整流驱动电路;顾亦磊等;《中国电机工程学报》;20050331;第25卷(第5期);第74-78页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103795229A (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103795229B (en) | Drive circuit of double-tube forward synchronous rectification circuit | |
| CN103138541B (en) | Drive transformer isolation self-adaptation drive circuit | |
| CN103841725B (en) | To release control module, controllable silicon light modulation LED drive circuit and system | |
| CN107196517B (en) | The driving circuit of clamp switch in Switching Power Supply | |
| CN202177974U (en) | LED traffic signal lamp and drive circuit thereof | |
| CN103248338A (en) | Triggering circuit of reverse switching transistor | |
| CN103683861B (en) | A kind of novel thyristor gating circuit | |
| CN103973084B (en) | A kind of for series resonance IGBT Driving Circuit | |
| CN209402435U (en) | A Pulse Power Supply Circuit in Electrostatic High Voltage Dust Removal | |
| CN102790434A (en) | Automatic energy-extraction circuit of current transformer | |
| CN109638797A (en) | A kind of Multi- Switch synchronization isolated drive circuit with overcurrent protection | |
| CN102570787B (en) | A kind of circuit for photovoltaic inverter system accessory power supply | |
| CN109004837A (en) | High voltage flyback converter | |
| CN110492727A (en) | A kind of driving circuit for IGBT series average-voltage | |
| CN203554287U (en) | Bipolar power supply circuit and solar power charge and discharge controller | |
| CN107834634A (en) | A kind of charging current limiter circuit for energy-storage battery group management system and the energy-storage battery group management system comprising charging current limiter circuit | |
| CN104467440A (en) | Switching power supply | |
| CN203055409U (en) | Led backlight drive circuit and liquid crystal display device | |
| CN204131385U (en) | Switching Power Supply current foldback circuit | |
| CN201113944Y (en) | High speed switch tube floating grid driver circuit | |
| CN208479472U (en) | A kind of switch converters and emergency ballast | |
| CN203608102U (en) | Transistor-based switching power supply | |
| CN208489798U (en) | The synchronous rectifying controller of adaptive adjustment driving voltage and the circuit for using it | |
| CN208834723U (en) | Multi-channel LED backlight drive circuit and LCD TV | |
| CN103857109B (en) | A kind of constant-current voltage-stabilizing drive circuit and light fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |