CN113258781B - Synchronous rectification driving circuit of flyback converter - Google Patents
Synchronous rectification driving circuit of flyback converter Download PDFInfo
- Publication number
- CN113258781B CN113258781B CN202110513595.0A CN202110513595A CN113258781B CN 113258781 B CN113258781 B CN 113258781B CN 202110513595 A CN202110513595 A CN 202110513595A CN 113258781 B CN113258781 B CN 113258781B
- Authority
- CN
- China
- Prior art keywords
- switch unit
- triode
- current
- flyback converter
- electrode
- 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 73
- 238000004804 winding Methods 0.000 claims abstract description 36
- 230000003071 parasitic effect Effects 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000003321 amplification Effects 0.000 abstract description 21
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 21
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
Abstract
The invention relates to a flyback converter synchronous rectification drive circuit which is connected between a power supply and a load, and comprises: the flyback converter main circuit comprises a synchronous rectifying tube and a switching tube, the switching tube is arranged on the input side of the flyback converter, the control end of the switching tube is used for being connected with an external controller, the synchronous rectifying tube is arranged on the output side of the flyback converter, and the synchronous rectifying tube is provided with parasitic capacitance; the synchronous rectification driving circuit comprises a driving winding, a first current amplification switch unit and a second current amplification switch unit, wherein the driving winding is coupled with the input side of the flyback converter main circuit, one ends of the first current amplification switch unit and the second current amplification switch unit are connected with the driving winding, and the other ends of the first current amplification switch unit and the second current amplification switch unit are connected with the control end of the synchronous rectifying tube. The efficiency of the flyback converter can be improved through the functions of the two current amplifying units.
Description
Technical Field
The invention relates to the field of driving circuits, in particular to a synchronous rectification driving circuit of a flyback converter.
Background
With the continuous reduction of the size of modern high-speed ultra-large scale integrated circuits and the continuous reduction of power consumption, the voltage requirement of a power supply is also reduced, and the output current is increased. In a low-voltage and high-current DC/DC converter, the conventional diode rectification method is not suitable for a low-voltage and high-current and high-efficiency converter because the adopted rectification diode generates larger on-state loss. Therefore, the flyback converter with synchronous rectification is generated, a rectifier diode and a freewheeling diode in the original converter output circuit are replaced by a power MOSFET with extremely low on resistance in the synchronous rectification circuit, the on-voltage drop and the on-loss can be greatly reduced, the overall conversion efficiency of the circuit is remarkably improved, and the effect is more obvious in the occasion of low-voltage and high-current.
The conventional synchronous rectification driving method can be classified into a voltage type driving and a current type driving according to driving types. However, the current type driving mode is not suitable for high-frequency operation and has higher cost because the current detection element is used to cause the driving additional loss to be increased; the voltage type driving mode has a complex structure, and the on and off speeds of the synchronous rectifying tube cannot be obviously improved, so that the efficiency of the flyback converter cannot be improved.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art has low efficiency by providing a synchronous rectification driving circuit of a flyback converter.
The technical scheme adopted for solving the technical problems is as follows: in a first aspect, a flyback converter synchronous rectification drive circuit is provided, connected between a power supply and a load, comprising: the flyback converter main circuit comprises a synchronous rectifying tube and a switching tube, wherein the switching tube is arranged on the input side of the flyback converter main circuit, the control end of the switching tube is used for being connected with an external controller, the synchronous rectifying tube is arranged on the output side of the flyback converter main circuit, and the synchronous rectifying tube has parasitic capacitance; the synchronous rectification driving circuit comprises a driving winding, a first current amplification switch unit and a second current amplification switch unit, wherein the driving winding is coupled with the input side of the flyback converter main circuit, one end of the first current amplification switch unit and one end of the second current amplification switch unit are connected with the driving winding, and the other end of the first current amplification switch unit and the other end of the second current amplification switch unit are connected with the control end of the synchronous rectification tube; when the switching tube is conducted, the driving winding drives the first current amplifying switch unit to be conducted, and the parasitic capacitance discharges under the effect of amplifying current of the first current amplifying switch unit; when the switching tube is cut off, the driving winding drives the second current amplifying switch unit to be conducted, and the parasitic capacitor is charged under the effect of amplifying current of the second current amplifying switch unit.
Further, the flyback converter main circuit further comprises an input filter capacitor, a high-frequency transformer, a magnetic reset circuit and an output filter capacitor, wherein the magnetic reset circuit is connected in parallel with the primary side of the high-frequency transformer, the homonymous end of the primary side of the high-frequency transformer is connected with the positive electrode of the power supply, the homonymous end of the primary side of the high-frequency transformer is connected with the output end of the switching tube, the input end of the switching tube is connected with the negative electrode of the power supply, the input filter capacitor is respectively connected with the positive electrode of the power supply and the negative electrode of the power supply, the homonymous end of the secondary side of the high-frequency transformer is connected with one end of the output filter capacitor and the positive electrode of the load, and the homonymous end of the secondary side of the high-frequency transformer is connected with the output end of the synchronous rectifying tube.
Further, the first current amplifying switch unit is a first triode, the second current amplifying switch unit is a second triode, the synchronous rectification circuit further comprises a current limiting resistor, the homonymous end of the driving winding is connected with the ground, the heteronymous end of the driving winding is connected with one end of the current limiting resistor, the base electrode of the first triode is connected with the base electrode of the second triode and then is connected with the other end of the current limiting resistor, the collector electrode of the first triode is connected with the collector electrode of the second triode and then is connected with one end of the current limiting resistor, and the emitter electrode of the first triode is connected with the emitter electrode of the second triode and then is connected with the control end of the synchronous rectification tube.
Further, the switching tube is a fully-controlled power semiconductor device.
Further, the fully controlled power semiconductor device is a MOSFET.
Further, the MOSFET is an N-type MOS tube, the grid electrode of the MOSFET is connected with an external controller, the source electrode of the MOSFET is grounded, and the drain electrode of the MOSFET is connected with the synonym end of the primary side of the high-frequency transformer.
Further, the synchronous rectifying tube is an N-type MOS tube, the grid electrode of the synchronous rectifying tube is connected with the emitter electrode of the first triode, the source electrode of the synchronous rectifying tube is connected with the other end of the output filter capacitor, and the drain electrode of the synchronous rectifying tube is connected with the homonymous end of the secondary side of the high-frequency transformer.
Further, the first triode is a PNP triode, and the second triode is an NPN triode.
The invention has the beneficial effects that the synchronous rectifying tube is arranged at one end of the output side of the flyback converter main circuit, the synchronous rectifying tube is provided with a parasitic capacitance, and is connected to a synchronous rectifying driving circuit, when the switching tube is conducted, the driving winding drives the first current amplifying switching unit to conduct, and the parasitic capacitance discharges under the effect of amplifying current of the first current amplifying switching unit; when the switching tube is cut off, the driving winding drives the second current amplifying switch unit to be conducted, and the parasitic capacitance is charged under the effect of amplifying current of the second current amplifying switch unit. Therefore, through the current amplification action of the first current amplification switch unit and the second current amplification switch unit, the on and off speeds of the synchronous rectifying tube can be effectively improved, and the efficiency of the flyback converter is improved.
Drawings
The invention will now be described in further detail with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of an overall circuit of a synchronous rectification driving circuit of a flyback converter according to the present invention.
In the figure: 1. flyback converters; 11. flyback converter main circuits; 12. a synchronous rectification driving circuit; 121. a first current amplifying switch unit; 122. and a second current amplifying switch unit.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, there is provided a flyback converter synchronous rectification drive circuit 1 connected between a power supply and a load, comprising: the flyback converter main circuit 11 and the synchronous rectification drive circuit 12, the input side and the output side of the flyback converter main circuit 11 are respectively connected with a power supply and a load, the flyback converter main circuit 11 comprises a synchronous rectifying tube Q2 and a switching tube Q1, the switching tube Q1 is arranged on the input side of the flyback converter main circuit 11, the control end of the switching tube Q1 is used for being connected with an external controller, the synchronous rectifying tube Q2 is arranged on the output side of the flyback converter main circuit 11, and the synchronous rectifying tube Q2 has a parasitic capacitance Cgs; the synchronous rectification driving circuit 12 includes a driving winding Nd, a first current amplification switching unit 121 and a second current amplification switching unit 122, the driving winding Nd is coupled to an input side of the flyback converter main circuit 11, one ends of the first current amplification switching unit 121 and the second current amplification switching unit 122 are connected to the driving winding Nd, and the other ends are connected to a control end of the synchronous rectification tube Q2.
Further, when the switching tube Q1 is turned on, the driving winding Nd drives the first current amplifying switch unit 121 to be turned on, and the parasitic capacitor Cgs discharges under the effect of amplifying current of the first current amplifying switch unit 121; when the switching tube Q1 is turned off, the driving winding Nd drives the second current amplifying switch unit 122 to be turned on, and the parasitic capacitor Cgs is charged under the effect of the amplifying current of the second current amplifying switch unit 122. Alternatively, the external controller may be a PWM controller.
By providing a synchronous rectifying tube Q2 at one end of the output side of the flyback converter main circuit 11, the synchronous rectifying tube Q2 has a parasitic capacitance Cgs, and the synchronous rectifying tube Q2 is connected to a synchronous rectifying driving circuit 12, when the switching tube Q1 is turned on, the driving winding Nd drives the first current amplifying switching unit 121 to be turned on, and the parasitic capacitance Cgs discharges under the effect of amplifying current of the first current amplifying switching unit 121; when the switching tube Q1 is turned off, the driving winding Nd drives the second current amplifying switch unit 122 to be turned on, and the parasitic capacitor Cgs is charged under the effect of the amplifying current of the second current amplifying switch unit 122. Thus, by the current amplifying action of the first current amplifying switch unit 121 and the second current amplifying switch unit 122, the on and off speeds of the synchronous rectifier Q2 can be effectively increased, and the efficiency of the flyback converter 1 can be improved.
In one embodiment, referring to fig. 1, the flyback converter main circuit 11 further includes an input filter capacitor C1, a high-frequency transformer T, a magnetic reset circuit, and an output filter capacitor C2, where the magnetic reset circuit is connected in parallel to a primary side of the high-frequency transformer T, a homonymous end of the primary side of the high-frequency transformer T is connected to an anode of a power supply, a heteronymous end of the primary side of the high-frequency transformer T is connected to an output end of a switching tube Q1, an input end of the switching tube Q1 is connected to a cathode of the power supply, the input filter capacitor C1 is connected to an anode of the power supply and a cathode of the power supply, respectively, a homonymous end of a secondary side of the high-frequency transformer T is connected to one end of the output filter capacitor C2 and an anode of the load, and an input end of the synchronous rectifier tube Q2 is connected to the other end of the output filter capacitor C2 and the cathode of the load.
In a specific embodiment, referring to fig. 1, the first current amplifying switch unit 121 is a first triode Q3, the second current amplifying switch unit 122 is a second triode Q4, the synchronous rectification circuit further includes a current limiting resistor R, the homonymous end of the driving winding Nd is connected with the ground, the heteronymous end of the driving winding Nd is connected with one end of the current limiting resistor R, the base electrode of the first triode Q3 and the base electrode of the second triode Q4 are connected with the other end of the current limiting resistor R, the collector electrode of the first triode Q3 and the collector electrode of the second triode Q4 are connected with one end of the current limiting resistor R, and the emitter electrode of the first triode Q3 and the emitter electrode of the second triode Q4 are connected with the control end of the synchronous rectification tube Q2.
Preferably, the switching transistor Q1 is a fully controlled power semiconductor device. The on-off of the power semiconductor device itself can be conveniently controlled by using the fully-controlled power semiconductor device.
Further, the fully controlled power semiconductor device is a MOSFET.
Preferably, the MOSFET is an N-type MOS tube, the grid electrode of the MOSFET is used for being connected with an external controller, the source electrode of the MOSFET is grounded, and the drain electrode of the MOSFET is connected with a different name end of the primary side of the high-frequency transformer TT.
Preferably, the synchronous rectifying tube Q2 is an N-type MOS tube, the grid electrode of the N-type MOS tube is connected with the emitter electrode of the first triode Q3, the source electrode of the synchronous rectifying tube Q2 is connected with the other end of the output filter capacitor C2, and the drain electrode of the synchronous rectifying tube Q2 is connected with the homonymous end of the secondary side of the high-frequency transformer T.
Further, the first transistor Q3 is a PNP transistor, and the second transistor Q4 is an NPN transistor.
With continued reference to fig. 1, the flyback converter of the present invention operates as follows:
during the on period of the switching tube Q1, an input voltage is applied to the primary winding, the inductance current increases linearly, and the high frequency transformer T stores electric energy in the form of magnetic energy in the primary inductance. At this time, the primary winding voltage is positive and negative from top to bottom, the secondary winding voltage and the driving winding Nd voltage are both positive and negative from top to bottom, the current direction on the driving winding Nd is from top to bottom, and the base voltage of the first triode Q3 is lower than the emitter voltage, so that the first triode Q3 is conducted, and the parasitic capacitance Cgs between the grid and the source of the synchronous rectifier Q2 is discharged; the parasitic capacitance Cgs can be increased in discharge speed by the current amplification of the first transistor Q3 so that the turn-off speed of the synchronous rectifier Q2 is increased. Until the synchronous rectifier Q2 turns off, this phase ends.
During the off period of the switching tube Q1, the energy stored in the primary inductor is coupled to the secondary side. At this time, the primary winding voltage of the transformer is positive and negative from top to bottom, and the secondary winding voltage and the driving winding Nd voltage are positive and negative from top to bottom. At this time, the gate voltage of the first transistor Q3 is higher than the emitter voltage, so the first transistor Q3 is not turned on; the collector voltage of the second triode Q4 is larger than the grid voltage and larger than the emitter voltage, so that the second triode Q4 is conducted, parasitic capacitance Cgs between grid sources of the synchronous rectifying tube Q2 is charged at the moment, and the charging speed of the parasitic capacitance Cgs can be increased by utilizing the current amplification effect of the second triode Q4, so that the turn-on speed of the synchronous rectifying tube Q2 is increased. The synchronous rectifying tube Q2 is conducted, the transformer releases energy, and the secondary side current is linearly reduced. This phase continues until the next cycle begins.
Thus, by the current amplifying action of the first current amplifying switch unit 121 and the second current amplifying switch unit 122, the on and off speeds of the synchronous rectifier Q2 can be effectively increased, and the efficiency of the flyback converter 1 can be improved.
It should be understood that the foregoing embodiments are merely illustrative of the technical solutions of the present invention, and not limiting thereof, and that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art; all such modifications and substitutions are intended to be included within the scope of this disclosure as defined in the following claims.
Claims (4)
1. A flyback converter synchronous rectification drive circuit connected between a power supply and a load, comprising:
the flyback converter main circuit comprises a synchronous rectifying tube and a switching tube, wherein the switching tube is arranged on the input side of the flyback converter main circuit, the control end of the switching tube is used for being connected with an external controller, the synchronous rectifying tube is arranged on the output side of the flyback converter main circuit, and the synchronous rectifying tube is provided with parasitic capacitance;
the synchronous rectification driving circuit is only composed of a driving winding, a current limiting resistor, a first current amplifying switch unit and a second current amplifying switch unit, wherein the driving winding is coupled with the input side of a transformer of the flyback converter main circuit, the first current amplifying switch unit and the second current amplifying switch unit are connected in parallel, one ends of the first current amplifying switch unit and the second current amplifying switch unit are connected with the driving winding, and the other ends of the first current amplifying switch unit and the second current amplifying switch unit are connected with the control end of the synchronous rectifying tube;
when the switching tube is conducted, the driving winding drives the first current amplifying switch unit to be conducted, and the parasitic capacitance discharges under the effect of amplifying current of the first current amplifying switch unit; when the switching tube is cut off, the driving winding drives the second current amplifying switch unit to be conducted, and the parasitic capacitor is rapidly charged under the effect of amplifying current of the second current amplifying switch unit;
the flyback converter main circuit further comprises an input filter capacitor, a high-frequency transformer, a magnetic reset circuit and an output filter capacitor, wherein the magnetic reset circuit is connected in parallel with the primary side of the high-frequency transformer, the homonymous end of the primary side of the high-frequency transformer is connected with the positive electrode of the power supply, the heteronymous end of the primary side of the high-frequency transformer is connected with the output end of a switching tube, the input end of the switching tube is connected with the negative electrode of the power supply, the input filter capacitor is respectively connected with the positive electrode of the power supply and the negative electrode of the power supply, the heteronymous end of the secondary side of the high-frequency transformer is connected with one end of the output filter capacitor and the positive electrode of the load, the homonymous end of the secondary side of the high-frequency transformer is connected with the output end of the synchronous rectifying tube, and the input end of the synchronous rectifying tube is connected with the other end of the output filter capacitor and the negative electrode of the load;
the first current amplifying switch unit is a first triode, the second current amplifying switch unit is a second triode, the homonymous end of the driving winding is connected with the ground, the heteronymous end of the driving winding is connected with one end of the current limiting resistor, the base electrode of the first triode is connected with the base electrode of the second triode and then is connected with the other end of the current limiting resistor, the collector electrode of the first triode is connected with the collector electrode of the second triode and then is connected with one end of the current limiting resistor, and the emitter electrode of the first triode is connected with the emitter electrode of the second triode and then is connected with the control end of the synchronous rectifying tube;
the grid electrode of the synchronous rectifying tube is connected with the emitter electrode of the first triode, the source electrode of the synchronous rectifying tube is connected with the other end of the output filter capacitor, and the drain electrode of the synchronous rectifying tube is connected with the homonymous end of the secondary side of the high-frequency transformer; the first triode is a PNP triode, and the second triode is an NPN triode.
2. The flyback converter synchronous rectification drive circuit of claim 1, wherein: the switch tube is a fully-controlled power semiconductor device.
3. The flyback converter synchronous rectification drive circuit of claim 2, wherein: the fully-controlled power semiconductor device is a MOSFET.
4. The flyback converter synchronous rectification drive circuit of claim 3, wherein: the MOSFET is an N-type MOS tube, the grid electrode of the MOSFET is connected with an external controller, the source electrode of the MOSFET is grounded, and the drain electrode of the MOSFET is connected with the different name end of the primary side of the high-frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110513595.0A CN113258781B (en) | 2021-05-11 | 2021-05-11 | Synchronous rectification driving circuit of flyback converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110513595.0A CN113258781B (en) | 2021-05-11 | 2021-05-11 | Synchronous rectification driving circuit of flyback converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113258781A CN113258781A (en) | 2021-08-13 |
| CN113258781B true CN113258781B (en) | 2024-02-27 |
Family
ID=77222863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110513595.0A Active CN113258781B (en) | 2021-05-11 | 2021-05-11 | Synchronous rectification driving circuit of flyback converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113258781B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555127A (en) * | 2003-12-25 | 2004-12-15 | 伊博电源（杭州）有限公司 | Magnetic amplifier auxiliary output circuit of isolation switch power source |
| CN101262177A (en) * | 2008-04-22 | 2008-09-10 | 英飞特电子（杭州）有限公司 | Current control synchronization commutation driving circuit |
| TW200906046A (en) * | 2007-07-26 | 2009-02-01 | Glacialtech Inc | Flyback converter with self-driven synchronous rectifier |
| CN201230285Y (en) * | 2008-04-11 | 2009-04-29 | 官继红 | Driver circuit for synchronous rectifying tube |
| CN102280989A (en) * | 2011-05-31 | 2011-12-14 | 南京航空航天大学 | Adaptive current source drive circuit |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN107078645A (en) * | 2014-10-21 | 2017-08-18 | 电力集成公司 | There is the output side controller of handover request at relaxation concussion extreme value |
-
2021
- 2021-05-11 CN CN202110513595.0A patent/CN113258781B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555127A (en) * | 2003-12-25 | 2004-12-15 | 伊博电源（杭州）有限公司 | Magnetic amplifier auxiliary output circuit of isolation switch power source |
| TW200906046A (en) * | 2007-07-26 | 2009-02-01 | Glacialtech Inc | Flyback converter with self-driven synchronous rectifier |
| CN201230285Y (en) * | 2008-04-11 | 2009-04-29 | 官继红 | Driver circuit for synchronous rectifying tube |
| CN101262177A (en) * | 2008-04-22 | 2008-09-10 | 英飞特电子（杭州）有限公司 | Current control synchronization commutation driving circuit |
| CN102280989A (en) * | 2011-05-31 | 2011-12-14 | 南京航空航天大学 | Adaptive current source drive circuit |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN107078645A (en) * | 2014-10-21 | 2017-08-18 | 电力集成公司 | There is the output side controller of handover request at relaxation concussion extreme value |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113258781A (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lin et al. | Analysis and implementation of full-bridge converter with current doubler rectifier | |
| US6373727B1 (en) | Synchronous rectification in a flyback converter | |
| Dudrik et al. | Zero-voltage and zero-current switching full-bridge DC–DC converter with auxiliary transformer | |
| CN109347311B (en) | Self-driven driving circuit of double-tube forward synchronous rectification circuit | |
| CN110504835B (en) | Switch converter and control method thereof | |
| CN101924483A (en) | Voltage-multiplied synchronizing rectifier circuit with energy recovery | |
| CN108322053B (en) | Step-down conversion circuit | |
| CN112803784B (en) | Self-excitation driving and power conversion circuit based on GaN HEMT device | |
| CN110719019B (en) | Secondary active clamping control circuit | |
| CN113258781B (en) | Synchronous rectification driving circuit of flyback converter | |
| CN218071319U (en) | Source electrode driven flyback converter | |
| CN217240596U (en) | Buck-Boost soft switching circuit | |
| Jaunay et al. | Dc-to-dc design guide | |
| US5959856A (en) | DC-to-DC power converter | |
| CN114553040A (en) | Full-bridge inverse soft switching circuit and control method | |
| CN111525810A (en) | LLC resonant converter and control circuit and control method thereof | |
| CN218526223U (en) | Synchronous rectification drive circuit of switching power supply | |
| CN216794868U (en) | Self-excited active clamping circuit | |
| CN210578268U (en) | Secondary side active clamping circuit | |
| CN212367131U (en) | Boost topology circuit | |
| CN218482787U (en) | Source synchronous driving circuit | |
| CN218733846U (en) | Double-tube flyback conversion circuit | |
| Bakan et al. | A New ZVT Two-Switch Forward Converter | |
| CN111293858B (en) | Self-driven synchronous rectification circuit of forward converter | |
| CN213243808U (en) | Secondary active clamp driving control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240112 Address after: Building 1, 3rd Floor, Building 15, Tianbao Road, Yingrenshi Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province, 518108 Applicant after: Shenzhen Yuntian Digital Energy Co.,Ltd. Address before: No.58, middle Yanta Road, Xi'an City, Shaanxi Province, 710000 Applicant before: XI'AN University OF SCIENCE AND TECHNOLOGY |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |