CN109995250A - Self-device synchronous rectification circuit based on vehicle-mounted DC/DC converter - Google Patents
Self-device synchronous rectification circuit based on vehicle-mounted DC/DC converter Download PDFInfo
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- CN109995250A CN109995250A CN201910233388.2A CN201910233388A CN109995250A CN 109995250 A CN109995250 A CN 109995250A CN 201910233388 A CN201910233388 A CN 201910233388A CN 109995250 A CN109995250 A CN 109995250A
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- oxide
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- synchronous rectification
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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
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of self-device synchronous rectification circuits based on vehicle-mounted DC/DC converter, including driving PWM output circuit certainly, self-device synchronous rectification module, and capacitance module, self-device synchronous rectification module includes the first metal-oxide-semiconductor Q287, second metal-oxide-semiconductor Q289, first zener diode ZD1, and the second zener diode ZD2, the drain electrode of first metal-oxide-semiconductor Q287 is connected with the first contact of access from driving PWM output module, the S source electrode of first metal-oxide-semiconductor Q287 is connected with the input terminal of capacitance module, the grid of first metal-oxide-semiconductor Q287 is connected with the second contact of access from driving PWM output module, the drain electrode of second metal-oxide-semiconductor Q289 is connected with the third contact of access from driving PWM output module, second metal-oxide-semiconductor Q289 S source electrode be connected with the input terminal of capacitance module, the grid of the second metal-oxide-semiconductor Q289 is connected with the 4th contact of access from driving PWM output module.The transfer efficiency that the present invention improves vehicle-mounted DC/DC converter is advantageously reduced to the kwh loss during power battery charging, high reliablity.
Description
Technical field
The present invention relates to a kind of self-device synchronous rectification circuits based on vehicle-mounted DC/DC converter, are suitable for electric car
High-pressure electric control technical field.
Background technique
The lack of energy to increasingly sharpen makes new energy technology increasingly be taken seriously, and has gradually in terms of automotive field
The inexorable trend of motorized, it is the assembly of battery respectively that compared with orthodox car, new-energy automobile, which has three big core components,
Refer to battery and battery management system；The assembly of motor, refers to motor and motor controller；The assembly of high-pressure electric control includes vehicle
It is vehicle-mounted for carrying DC/DC converter, Vehicular charger, electric air-conditioning, PTC, high voltage distribution box and other high voltage components, main component
DC/DC converter and Vehicular charger.Vehicle-mounted DC/DC converter is that a kind of DC voltage conversion of level is another level
The circuit of DC voltage.When changing voltage using transformer, transformer need to pass through alternating voltage.DC/DC converter passes through utilization
The DC voltage of high-tension battery is converted thereof into alternating voltage by power semiconductor on-off；Then transformer conversion exchange is utilized
Voltage recycles power switch tube that alternating voltage is converted into the DC voltage of 12V, the mistake of alternating voltage conversion dc voltage
Journey is known as rectifying, it is also necessary to capacitor is used, for the noise (smoothing) for inhibiting voltage waveform.
In traditional DC/DC power supply, rectifier diode on-state voltage drop used by rectification circuit is 0.5V or so, it is clear that
It is not able to satisfy the requirement of low-voltage high-current power source efficiency, and the kwh loss generated in charging process is also more,
Summary of the invention
The purpose of the present invention is to provide a kind of self-device synchronous rectification circuits based on vehicle-mounted DC/DC converter, favorably
In reduction to the kwh loss during power battery charging.At present using the DC/DC converter of synchronous rectification topological circuit
Efficiency with full load can reach 92% or more, builds driving circuit using analog electronics, realizes circuit of synchronous rectification
Driving, high reliablity, while digital circuit being replaced to drive, save I/O resource.
The technical solution for realizing the aim of the invention is as follows: the self-device synchronous rectification electricity based on vehicle-mounted DC/DC converter
Road, including acquiring the upper and lower end voltage of main transformer vice-side winding and exporting from driving PWM for pressure stabilizing clamper output pwm signal
Module realizes the self-device synchronous rectification module of alternating current conversion direct current for receiving pwm signal, and is used for voltage waveform
Noise capacitance module, the self-device synchronous rectification module includes the first metal-oxide-semiconductor Q287, the second metal-oxide-semiconductor Q289, with first
The concatenated first zener diode ZD1 of metal-oxide-semiconductor Q287, and with the concatenated second zener diode ZD2 of the second metal-oxide-semiconductor Q289,
Wherein:
The drain electrode of the first metal-oxide-semiconductor Q287 is connected with access first contact from driving PWM output module, and first
The S source electrode of metal-oxide-semiconductor Q287 is connected with the input terminal of capacitance module, and the grid of the first metal-oxide-semiconductor Q287 and access are described from driving PWM
Second contact of output module is connected, the drain electrode of the second metal-oxide-semiconductor Q289 and access the from driving PWM output module
Three contacts be connected, the S source electrode of the second metal-oxide-semiconductor Q289 is connected with the input terminal of capacitance module, the grid of the second metal-oxide-semiconductor Q289 with connect
Enter the 4th contact from driving PWM output module to be connected.
Further, the first metal-oxide-semiconductor Q287 and the second metal-oxide-semiconductor Q289 is the IRFS3006-7PBF of model Infineon
Metal-oxide-semiconductor.
Further, the first zener diode ZD1 and the second zener diode ZD2 be model LM3Z3V0T1G,
The zener diode of BZX84-C18.
Further, capacitance module uses multiple shunt capacitances, and the capacitance of the capacitor is 10uF, voltage 50V.
It further, include for the self-powered for being connect with self-device synchronous rectification module from driving PWM output module
Dynamic PWM output signal circuit one and certainly driving PWM output signal circuit two.
Compared with prior art, the present invention its remarkable advantage is: synchronous rectifier is widely used in recommending, half-bridge and complete
In the low-voltage high-current power source of bridge structure, the transfer efficiency of vehicle-mounted DC/DC converter is improved, advantageously reduces and is filled to power battery
Kwh loss in electric process can reach using the efficiency with full load of the DC/DC converter of the synchronous rectification topological circuit
92% or more, analog drive circuit is built using analog electronics, realizes the driving of circuit of synchronous rectification, high reliablity, together
When replace digital circuit drive, save I/O port resource.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below to the embodiment of the present invention
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiment of the present invention, it for those of ordinary skill in the art, without creative efforts, can be with
Other accompanying drawings are obtained according to the attached drawing of offer.
Fig. 1 is that vehicle-mounted DC/DC secondary synchronization of the invention rectifies main topological diagram；
Fig. 2 is from driving one schematic diagram of PWM output signal circuit；
Fig. 3 is from driving two schematic diagram of PWM output signal circuit；
Fig. 4 is synchronous rectification two-way from driving signal PWM simulation waveform.
Specific embodiment
In conjunction with Fig. 1-4, based on the self-device synchronous rectification circuit of vehicle-mounted DC/DC converter, including acquisition main transformer pair
The upper and lower end voltage of side winding and pressure stabilizing clamper output pwm signal from driving PWM output module, for receiving pwm signal reality
The self-device synchronous rectification module of existing alternating current conversion direct current, and the capacitance module of the noise for voltage waveform, capacitor
Module uses eight shunt capacitances, and the capacitance of the capacitor is 10uF, voltage 50V, and self-device synchronous rectification module includes
First metal-oxide-semiconductor Q287, the second metal-oxide-semiconductor Q289, with the concatenated first zener diode ZD1 of the first metal-oxide-semiconductor Q287, and with second
Metal-oxide-semiconductor Q289 concatenated second zener diode ZD2, the first metal-oxide-semiconductor Q287 and the second metal-oxide-semiconductor Q289 are model Infineon
IRFS3006-7PBF metal-oxide-semiconductor, it is 0.0021 Ω that it is extremely low that internal resistance is connected in major parameter, driving current 293A, bipolarity half
The suitable metal-oxide-semiconductor of periodic signal driving, has the advantages that circulation is small, loss is small, electromagnetic interference is small, the first zener diode ZD1
It is respectively the zener diode of model LM3Z3V0T1G, BZX84-C18 with the second zener diode ZD2, in which:
The drain electrode of first metal-oxide-semiconductor Q287 is connected with the access first contact DRP7D from driving PWM output module, the
The S source electrode of one metal-oxide-semiconductor Q287 is connected with the input terminal of capacitance module, and the grid of the first metal-oxide-semiconductor Q287 and access are described from driving
Second contact DRP7G of PWM output module is connected, and the drain electrode and access of the second metal-oxide-semiconductor Q289 is described from driving PWM output
The third contact DRP8D of module is connected, and the S source electrode of the second metal-oxide-semiconductor Q289 is connected with the input terminal of capacitance module, the second metal-oxide-semiconductor
The grid of Q289 is connected with access the 4th contact DRP8G from driving PWM output module.
Analog circuit is built using analog electronics from driving PWM output module, realizes the driving of circuit of synchronous rectification,
High reliablity, saves I/O port resource, and driving PWM output module certainly includes driving PWM output signal circuit one and certainly driving PWM certainly
Output signal circuit two, the first contact DRP7D and the second contact DRP7G setting are from driving on PWM output signal circuit one, and the
Three contact DRP8D and the 4th contact DRP8G setting drives PWM output signal circuit from driving PWM output signal electricity two certainly
One the first contact DRP7D is connected with 3 ends of main transformer T1, from the third contact DRP8D for driving PWM output signal circuit two
It is connected with 5 ends of main transformer T1.
As shown in Figure 1, from driving PWM output circuit be that itself is active, can according to collect main transformer T1 pair side around
Group upper and lower end voltage it is positive and negative, can pressure stabilizing clamper output pwm signal driving self-device synchronous rectification module in the first MOS
Pipe Q287 and the second metal-oxide-semiconductor Q289 realizes self-device synchronous rectification, and secondary side becomes DC voltage after over commutation, using capacitor
Become after smooth direct current after capacitor filtering in module to vehicle-mounted low pressure source charging (load).
As depicted in figs. 1 and 2, it is positive in the 3 end Same Name of Ends of main transformer T1, to export positive potential end, due to the first MOS
Pipe Q287 itself included reversed freewheeling diode makes S source electrode also form the high potential point of clamper, at this time the first metal-oxide-semiconductor Q287
Cut-off；It is negative for the 5 end different name ends in main transformer T1, second metal-oxide-semiconductor Q289 itself included reversed freewheeling diode makes
S source electrode also form the low potential point of clamper, be connected to ground terminal GNDLP, so when Q289 drain electrode be relative to ground terminal
Negative Schottky PN junction potential (- 0.7V~-0.2V), forms the basis of conducting, positive PN junction 0.5V is taken, due to DRP8D potential
It is double-triode valve NPN combined chip for -0.5V, chip U10, the triode TR1 in U10 ends, and the triode TR2 in U10 is led
It is logical；VCCLPDR passes through resistance R3, resistance R40, zener diode D8, and triode TR2, zener diode D8 two in U10 is connected
End, which is formed, stablizes 3.3V (forming clamper close to 4.7V voltage relative to DRP8D potential point)；Complementary circuit positive-negative-positive three is recommended in formation
Pole pipe Q7 and NPN type triode Q8 (totem-pote circuit drive amplification), NPN type triode Q8 ground level can produce stabling current, therefore
NPN type triode Q8 conducting due to PNP type triode Q7 does not become reversed Vbe, so when end, pass through protection and use
The end bidirectional trigger diode Q18 Net8 potential is 1.8V (3 PN junctions), and PNP type triode Q29 and NPN type triode Q30 are recommended
Complementary circuit, Q30 conducting, Q29 cut-off, DRP8G can form the voltage greater than Vgs (th) relative to ground terminal GNDLP at this time, therefore
Q289 conducting；Main transformer centre cap lower end is positive, Q289 conducting, formation can bringing onto load closed circuit, and two-way triggering
Diode Q18 end Net8 is by bidirectional trigger diode Q21, zener diode Q9, (reversed) the small letter of formation of zener diode D11
Number current loop, the both ends zener diode D11 form stable 3.3V, can lead to NPN type triode Q11, NPN type triode Q32
Conducting, so that Q287 shorting advance, effectively forms and rectify two-tube simultaneously turn on up and down.Main transformer centre cap lower end is
Just, Q289, Q287 are connected, and still maintain to form primary current and flow to closed circuit.
As shown in figures 1 and 3, working as from driving PWM output signal circuit two in main transformer Same Name of Ends DRP7D is by just becoming
It is negative, DRP8D process is from during negative become just, the triode TR2 cut-off in chip U10 at this time, the triode TR1 in U10
Conducting；Q7 conducting, Q8 cut-off, Q29 conducting, Q30 cut-off；At this time Q289 grid voltage drop to the voltage greater than Vgs (th) hereinafter,
Q29 conducting simultaneously, which can produce grid current, can reversely rapidly switch off Q289.It is negative in the 3 end Same Name of Ends of main transformer T1, is defeated
Negative potential end (relative to GNDLP, carry output end potential difference through band and become smaller) out, the triode TR1 cut-off in chip U13, three poles
Pipe TR2 conducting；It is formed at this time and recommends complementary circuit PNP type triode Q10 and NPN type triode Q11 grounded base, due to pressure stabilizing two
Pole pipe D11 and resistance R43 is formed close to 3.3V (forming clamper 4.3V voltage relative to DRP7D potential point), and can produce stabilization
Q11, Q10 cut-off is connected in base current；The amplification electric current of emitting stage altogether in chip U13, by bidirectional trigger diode Q20 and
Q32 forms stable base current, Q32 conducting, PNP type triode Q31 cut-off；DRP7G can be formed relative to ground terminal GNDLP at this time
Greater than the voltage of Vgs (th), so that Q287 is connected, formation can bringing onto load closed circuit；(two pole zener diode D12 and pressure stabilizing
Pipe D14 protects Q32, Q31), Net7 accesses bidirectional trigger diode Q19, zener diode Q23, zener diode D8 and can guarantee
Q289 shorting advance, main transformer centre cap upper end are positive, and Q287, Q289 conducting still can keep bringing onto load closed circuit,
It is positive when in main transformer Same Name of Ends DRP7D potential by negative, DRP8D process is just being become during bearing from potential, at this time chip U13
Two-tube middle TR2 cut-off, TR1 conducting；PNP type triode Q10 conducting, Q11 cut-off, Q31 conducting, Q32 cut-off；Q287 grid at this time
Voltage drops to the voltage greater than Vgs (th) hereinafter, Q31 conducting simultaneously can produce grid current and can reversely rapidly switch off Q287.With
The model BAV23 and BAV99W of bidirectional trigger diode in upper circuit, the model of PNP type triode and NPN type triode
For PBSS4140T and PMBT2907A, the model PBSS4540X and PBSS5540X of Q7, Q8, Q20, Q30.
Synchronous rectification output is all formed and is completely closed back by anode and load of 3 end of main transformer output center tap
Road, the phase of synchronous transformation output, completes unified switching process, and Fig. 4 emulates wave from driving signal PWM for synchronous rectification two-way
Shape.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (5)
1. the self-device synchronous rectification circuit based on vehicle-mounted DC/DC converter, which is characterized in that including acquiring main transformer pair side
The upper and lower end voltage of winding and being realized from driving PWM output module, for receiving pwm signal for pressure stabilizing clamper output pwm signal
Alternating current converts the self-device synchronous rectification module of direct current, and the capacitance module of the noise for voltage waveform, it is described from
Driving synchronous rectification module includes the first metal-oxide-semiconductor Q287, the second metal-oxide-semiconductor Q289 and concatenated first pressure stabilizing of the first metal-oxide-semiconductor Q287
Diode ZD1, and with the concatenated second zener diode ZD2 of the second metal-oxide-semiconductor Q289, in which:
The drain electrode of the first metal-oxide-semiconductor Q287 is connected with access first contact from driving PWM output module, the first MOS
The S source electrode of pipe Q287 is connected with the input terminal of capacitance module, and the grid of the first metal-oxide-semiconductor Q287 and access are described defeated from driving PWM
The second contact of module is connected out, and the drain electrode and access of the second metal-oxide-semiconductor Q289 is described from the third for driving PWM output module
Contact is connected, and the S source electrode of the second metal-oxide-semiconductor Q289 is connected with the input terminal of capacitance module, the grid of the second metal-oxide-semiconductor Q289 and access
The 4th contact from driving PWM output module is connected.
2. the self-device synchronous rectification circuit according to claim 1 based on vehicle-mounted DC/DC converter, which is characterized in that
The first metal-oxide-semiconductor Q287 and the second metal-oxide-semiconductor Q289 is the metal-oxide-semiconductor of the IRFS3006-7PBF of model Infineon.
3. the self-device synchronous rectification circuit according to claim 1 based on vehicle-mounted DC/DC converter, which is characterized in that
The first zener diode ZD1 and the second zener diode ZD2 is respectively the steady of model LM3Z3V0T1G, BZX84-C18
Press diode.
4. the self-device synchronous rectification circuit according to claim 1 based on vehicle-mounted DC/DC converter, which is characterized in that
The capacitance module uses multiple shunt capacitances, and the capacitance of the capacitor is 10uF, voltage 50V.
5. the self-device synchronous rectification circuit according to claim 1 based on vehicle-mounted DC/DC converter, which is characterized in that
Certainly the driving PWM output module includes the driving PWM output signal circuit certainly for connecting with self-device synchronous rectification module
One and from driving PWM output signal circuit two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910233388.2A CN109995250A (en) | 2019-03-26 | 2019-03-26 | Self-device synchronous rectification circuit based on vehicle-mounted DC/DC converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910233388.2A CN109995250A (en) | 2019-03-26 | 2019-03-26 | Self-device synchronous rectification circuit based on vehicle-mounted DC/DC converter |
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| CN109995250A true CN109995250A (en) | 2019-07-09 |
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Citations (6)
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|---|---|---|---|---|
| JPH11103573A (en) * | 1997-07-30 | 1999-04-13 | Lucent Technol Inc | Self-synchronization drive circuit, method for driving synchronous commutator, and power converter |
| CN203660910U (en) * | 2013-12-26 | 2014-06-18 | 广州视源电子科技股份有限公司 | Asymmetrical half-bridge circuit |
| CN105846700A (en) * | 2016-03-29 | 2016-08-10 | 广州视源电子科技股份有限公司 | LLC half-bridge resonant converter and secondary synchronous rectifier device thereof |
| CN108023486A (en) * | 2018-01-16 | 2018-05-11 | 中国科学院上海微系统与信息技术研究所 | A kind of LLC resonant half-bridge converters |
| CN108306513A (en) * | 2018-02-27 | 2018-07-20 | 成都芯源系统有限公司 | Turn-off control circuit of synchronous rectifier tube and synchronous rectifier control circuit |
| CN208480006U (en) * | 2018-08-14 | 2019-02-05 | 广州视源电子科技股份有限公司 | A kind of DC/DC conversion circuit, circuit board and LED display device |
-
2019
- 2019-03-26 CN CN201910233388.2A patent/CN109995250A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11103573A (en) * | 1997-07-30 | 1999-04-13 | Lucent Technol Inc | Self-synchronization drive circuit, method for driving synchronous commutator, and power converter |
| CN203660910U (en) * | 2013-12-26 | 2014-06-18 | 广州视源电子科技股份有限公司 | Asymmetrical half-bridge circuit |
| CN105846700A (en) * | 2016-03-29 | 2016-08-10 | 广州视源电子科技股份有限公司 | LLC half-bridge resonant converter and secondary synchronous rectifier device thereof |
| CN108023486A (en) * | 2018-01-16 | 2018-05-11 | 中国科学院上海微系统与信息技术研究所 | A kind of LLC resonant half-bridge converters |
| CN108306513A (en) * | 2018-02-27 | 2018-07-20 | 成都芯源系统有限公司 | Turn-off control circuit of synchronous rectifier tube and synchronous rectifier control circuit |
| CN208480006U (en) * | 2018-08-14 | 2019-02-05 | 广州视源电子科技股份有限公司 | A kind of DC/DC conversion circuit, circuit board and LED display device |
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Application publication date: 20190709 |