CN106712483A - Synchronous rectification circuit, charger and protection method of charger - Google Patents
Synchronous rectification circuit, charger and protection method of charger Download PDFInfo
- Publication number
- CN106712483A CN106712483A CN201710112576.0A CN201710112576A CN106712483A CN 106712483 A CN106712483 A CN 106712483A CN 201710112576 A CN201710112576 A CN 201710112576A CN 106712483 A CN106712483 A CN 106712483A
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- rectification
- semiconductor
- oxide
- circuit
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Classifications
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- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention provides a synchronous rectification circuit, a charger and a protection method of the charger. The synchronous rectification circuit comprises a transformer, a rectifier MOS transistor connected with the output end of the transformer, a detection circuit and a control module, wherein the detection circuit is used for detecting whether the rectifier MOS transistor is abnormal or not, and the control module is connected with the detection circuit and is used for reducing the output power of the transformer so as to decrease the output current of the charger if the detection circuit detects that the rectifier MOS transistor is abnormal. According to the synchronous rectification circuit provided by the invention, if the malfunction of the synchronous rectification circuit results in the abnormity of the rectifier MOS transistor, the synchronous rectification circuit can decrease the output power of the transformer, so that the output current of the charger can be decreased, and therefore, the current of the MOS transistor can be decreased, and the MOS transistor can be protected from being damaged.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of circuit of synchronous rectification, charger and charger protection
Method.
Background technology
With the development of mobile communication technology, the mobile terminal such as mobile phone and panel computer is increasingly popularized, and mobile terminal is
As an indispensable part in people's daily life.People for mobile terminal requirement more and more higher, except require move
Dynamic terminal possesses outside abundant use function, also requires that mobile terminal can realize quick charge and possess enough continuation of the journey energy
Power.
At present, synchronous rectification is used by the secondary commutation to charger, the charge efficiency of charger can be improved, lifted
The speed that mobile terminal charges, shortens user and charges the stand-by period.But, when synchronous rectification is broken down, secondary commutation is just
Common rectification mode can be returned to, electric current can flow through from the parasitic diode in the rectification metal-oxide-semiconductor of circuit of synchronous rectification, rectification
The loss of metal-oxide-semiconductor can significantly rise, and rectification metal-oxide-semiconductor may be caused to damage, and the normal of influence charger is used.It can be seen that, at present
Charger there is a problem of synchronous rectification break down cause rectification metal-oxide-semiconductor damage.
The content of the invention
The embodiment of the present invention provides the guard method of a kind of circuit of synchronous rectification, charger and charger, to solve at present
Charger there is a problem of synchronous rectification break down cause rectification metal-oxide-semiconductor damage.
In a first aspect, the embodiment of the invention provides a kind of circuit of synchronous rectification, charger, the synchronous rectification are applied to
Circuit includes the rectification metal-oxide-semiconductor of the output end connection of transformer and the transformer, detection circuit and control module, described
Detection circuit is used to detect whether the rectification metal-oxide-semiconductor is abnormal；The control module is connected with the detection circuit, if for institute
Detection electric circuit inspection is stated to the rectification metal-oxide-semiconductor exception, the power output of the transformer is turned down, and then reduce the charger
Output current.
Second aspect, the embodiment of the present invention also provides a kind of charger, including above-mentioned circuit of synchronous rectification.
The third aspect, the embodiment of the present invention also provides a kind of guard method of charger, is applied to be provided with synchronous rectification
The charger of circuit, the rectification metal-oxide-semiconductor of output end connection of the circuit of synchronous rectification including transformer and the transformer,
Detection circuit and control module, methods described include：
Whether rectification metal-oxide-semiconductor described in the detection electric circuit inspection is abnormal；
If described detect electric circuit inspection to the rectification metal-oxide-semiconductor exception, the control module turns down the defeated of the transformer
Go out power, and then reduce the output current of the charger.
So, in the embodiment of the present invention, the circuit of synchronous rectification includes that transformer and the output end of the transformer connect
Rectification metal-oxide-semiconductor, detection circuit and the control module for connecing, the detection circuit are used to detect whether the rectification metal-oxide-semiconductor is abnormal；
The control module is connected with the detection circuit, if being turned down to the rectification metal-oxide-semiconductor exception for the detection electric circuit inspection
The power output of the transformer, and then reduce the output current of charger.So, if synchronous rectification is broken down causes rectification
Metal-oxide-semiconductor exception, circuit of synchronous rectification can turn down the power output of transformer, to reduce the output current of charger, so that
The current reduction of rectification metal-oxide-semiconductor, prevents rectification metal-oxide-semiconductor to be damaged.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to needed for embodiment of the present invention description
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without having to pay creative labor, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of circuit of synchronous rectification schematic diagram provided in an embodiment of the present invention；
Fig. 2 is another circuit of synchronous rectification schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic flow sheet of the guard method of charger provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Referring to Fig. 1, Fig. 1 is a kind of circuit of synchronous rectification schematic diagram provided in an embodiment of the present invention, as shown in figure 1, this is same
Step rectification circuit is applied to charger, including transformer 10 and be connected with the output end of the transformer 10 rectification metal-oxide-semiconductor 20,
Detection circuit 30 and control module 40, the detection circuit 30 are used to detect whether the rectification metal-oxide-semiconductor 20 is abnormal；The control
Molding block 40 is connected with the detection circuit 30, if detecting the exception of the rectification metal-oxide-semiconductor 20 for the detection circuit 30, adjusts
The power output of the low transformer 10, and then reduce the output current of charger.
In the embodiment of the present invention, if synchronous rectification is broken down, the exception of rectification metal-oxide-semiconductor can be caused, detect circuit
30 can detect the exception of rectification metal-oxide-semiconductor 20, and send abnormal signal to control module 40, and control module 40 can be according to connecing
The abnormal signal of receipts, adjusts the dutycycle of the ON time of transformer 10, the power output of transformer 10 is reduced, to reduce charging
The output current of device, such that it is able to when synchronous rectification is broken down, make the current reduction of rectification metal-oxide-semiconductor 20, protection rectification MOS
Pipe 20, it is to avoid rectification metal-oxide-semiconductor 20 is damaged.
It should be noted that above-mentioned circuit of synchronous rectification also includes rectification control chip 50 and electric capacity 60 etc., wherein, it is whole
Flow control chip 50 is connected with the grid of rectification metal-oxide-semiconductor 20, can control the conducting and cut-off of rectification metal-oxide-semiconductor 20；Electric capacity 60 is simultaneously
It is coupled between the vice-side winding of transformer 10 and load, it is possible to achieve the voltage stabilizing to the output voltage of transformer 10.Certainly, it is above-mentioned
Circuit of synchronous rectification can also include other components, not enumerated herein.Other above-mentioned control module 40 can be with
It is the controller of the power output that can arbitrarily realize turning down transformer 10.
Optionally, as shown in Fig. 2 detection circuit 30 can include controller 31, a terminal and the control mould of controller 31
Block 40 is connected, and the drain electrode of rectification metal-oxide-semiconductor 20 is connected with one end of the vice-side winding of transformer 10, and source electrode connects with load (not shown)
Connect, grid is connected with the another terminal of controller 31, controller 31 is used to detect the driving letter of the grid output of rectification metal-oxide-semiconductor 20
Number.
In the embodiment of the present invention, if because above-mentioned circuit of synchronous rectification is in running order, when rectification metal-oxide-semiconductor 20 is normal
When, can persistently there is drive signal in the grid of the rectification metal-oxide-semiconductor 20；When rectification metal-oxide-semiconductor 20 is abnormal, the rectification metal-oxide-semiconductor 20
Can there is interruption in the drive signal of grid.Therefore, controller 31 can detect the grid of the rectification metal-oxide-semiconductor 20 in Preset Time
Whether drive signal is not had, or there is interruption in the drive signal of detection, if, it is determined that the rectification metal-oxide-semiconductor 20 is abnormal, control
Device 31 can send abnormal signal to control module 40, to turn down the power output of transformer 10, so as to reduce the defeated of charger
Go out electric current.
Certainly, optionally, detection circuit can include thermistor (not shown), and thermistor is near rectification metal-oxide-semiconductor 20
Set, and thermistor is connected with control module 40, thermistor is used to detect the temperature of rectification metal-oxide-semiconductor 20.
Wherein, in the case where circuit of synchronous rectification is in running order, when rectification metal-oxide-semiconductor 20 occurs abnormal, rectification metal-oxide-semiconductor 20
Because loss significantly rises, its temperature can be caused to rise, the thermistor near its setting can detect the rectification metal-oxide-semiconductor 20
Temperature change, when rectification metal-oxide-semiconductor 20 temperature exceed preset temperature value when, thermistor can send different to control module 40
Regular signal, wherein, the abnormal signal can be specific currents or voltage signal, for example：Abnormal signal is more than a certain threshold value
Electric current.
Optionally, circuit of synchronous rectification can also include sample resistance 70, and sample resistance 70 is series at transformer 10 and bears
Between load, and it is connected with control module 40.So, sample resistance 70 can feed back the output of charger to control module 40 in real time
Electric current, makes the power output of the accurate regulation transformer 10 of control module 40, and the output current of charger is adjusted to default
Current value, so as to improve the reliability of the circuit of synchronous rectification.
Wherein, control module 40 can by sample resistance 70 acquisition charger real-time output current, for example：Can be with
The voltage at the two ends of sample resistance 70 is obtained by the potentiometer (not shown) in parallel with sample resistance 70, and control module 40 is obtained
The measured value of the potentiometer, control module 40 can according to the resistance value of the measured value and sample resistance 70 be calculated by
The real-time output current of sample resistance 70.
Optionally, circuit of synchronous rectification also includes controlling switch 80, and controlling switch 80 is located at the vice-side winding of transformer 10
Connected between load and with sample resistance 70, controlling switch 80 is connected with control module 40.Wherein, when event occurs in synchronous rectification
During barrier, rectification metal-oxide-semiconductor 20 may cause damage because the electric current for flowing through is excessive, control module 40 can control controlling switch 80 and
When disconnecting transformer 10 vice-side winding loop, adjust charger output current be zero current, further avoid rectification MOS
Pipe 20 is damaged.
So, in the embodiment of the present invention, circuit of synchronous rectification includes the rectification of the output end connection of transformer and transformer
Metal-oxide-semiconductor, detection circuit and control module, detection circuit are used to detect whether rectification metal-oxide-semiconductor is abnormal；Control module and the inspection
Slowdown monitoring circuit is connected, if for detecting electric circuit inspection to rectification metal-oxide-semiconductor exception, the power output of transformer is turned down, and then reduction is filled
The output current of electrical equipment.So, if synchronous rectification is broken down causes rectification metal-oxide-semiconductor exception, circuit of synchronous rectification can be turned down
The power output of transformer, to reduce the output current of charger, so that the current reduction of rectification metal-oxide-semiconductor, prevents rectification MOS
Pipe is impaired.
Based on above-mentioned circuit of synchronous rectification, the embodiment of the present invention also provides a kind of charging including above-mentioned circuit of synchronous rectification
Device.
Because the structure of charger body is prior art, circuit of synchronous rectification has been carried out specifically in the above-described embodiments
It is bright, therefore, the structure in the present embodiment for specific electronic equipment is repeated no more.
Referring to Fig. 3, Fig. 3 is the schematic flow sheet of the guard method of another charger provided in an embodiment of the present invention, should
For the charger including being provided with above-mentioned circuit of synchronous rectification, the circuit of synchronous rectification includes transformer 10 and transformer
The rectification metal-oxide-semiconductor 20 of 10 output end connection, detection circuit 30 and control module 40, detection circuit 30 connect with control module 40
Connect, as shown in figure 3, the method is comprised the following steps：
Whether step 301, the detection detection rectification of circuit 30 metal-oxide-semiconductor 20 are abnormal.
In the embodiment of the present invention, in the case where circuit of synchronous rectification is in running order, if synchronous rectification is broken down, can be with
Cause the loss of rectification metal-oxide-semiconductor 20 significantly to rise, make rectification metal-oxide-semiconductor 20 abnormal, detection circuit 30 can detect rectification MOS
The exception of pipe 20, and send abnormal signal to control module 40.
Optionally, detection circuit 30 detection rectification metal-oxide-semiconductor 20 whether abnormal step, can include：
Whether the grid of the detection detection rectification of circuit 30 metal-oxide-semiconductor 20 has drive signal, if the grid of rectification metal-oxide-semiconductor 20 does not have
Drive signal, determines that rectification metal-oxide-semiconductor 20 is abnormal.
Wherein, because when rectification metal-oxide-semiconductor 20 is normal, the grid of the rectification metal-oxide-semiconductor 20 can persistently have drive signal；When
When rectification metal-oxide-semiconductor 20 is abnormal, can there is interruption in the drive signal of the grid of the rectification metal-oxide-semiconductor 20, detection circuit 30 can be detected
Whether the grid of rectification metal-oxide-semiconductor 20 has drive signal, if without drive signal, can determine that rectification metal-oxide-semiconductor 20 is abnormal.Example
Such as：Controller 31 can be connected in the grid of rectification metal-oxide-semiconductor 20, detect whether rectification metal-oxide-semiconductor 20 has driving to believe by controller 31
Number, and send abnormal signal to control module 40.
Optionally, whether detection circuit 30 detection rectification metal-oxide-semiconductor 20 can include in abnormal step：
Whether the temperature of the detection detection rectification of circuit 30 metal-oxide-semiconductor 20 exceeds preset temperature value, if the temperature of rectification metal-oxide-semiconductor surpasses
Go out the preset temperature value, determine the rectification metal-oxide-semiconductor exception.
Wherein, in the case where circuit of synchronous rectification is in running order, when rectification metal-oxide-semiconductor 20 occurs abnormal, rectification metal-oxide-semiconductor 20
Because loss significantly rises, its temperature can be caused to rise, detection circuit 30 can detect whether the temperature of rectification metal-oxide-semiconductor 20 exceeds
Preset temperature value, if exceeding preset temperature value, can determine that rectification metal-oxide-semiconductor 20 is abnormal.For example：Can be near rectification MOS
Pipe 20 sets a thermistor, and the temperature of rectification metal-oxide-semiconductor 20 is detected by thermistor, and when the temperature of rectification metal-oxide-semiconductor 20 surpasses
When going out preset temperature value, abnormal signal is sent to control module 40.
If step 302, detection circuit 30 are detected, and rectification metal-oxide-semiconductor 20 is abnormal, control module 40 turns down the defeated of transformer 10
Go out power, and then reduce the output current of charger.
In the embodiment of the present invention, when control module 40 receives abnormal signal, control module 40 can adjust transformer
The dutycycle of 10 ON times, making the output voltage of transformer 10 reduces, so as to reduce the power output of transformer 10, and then drops
The output current of low charger, so that the current reduction of rectification metal-oxide-semiconductor 20.
For example：The normal maximum output 5V/4A of circuit of synchronous rectification, the conducting resistance of rectification metal-oxide-semiconductor 20 is 10m Ω, is posted
The conducting voltage of raw diode is 0.7V.In the case of normal full load, the loss of rectification metal-oxide-semiconductor 20 is Pmos=4A × 4A × 10m
Ω=0.16W；When synchronous rectification occurs abnormal, Pmos=4A × 0.7V=2.8W.Therefore, when rectification metal-oxide-semiconductor 20 occurs abnormal
17.5 times when being normal of loss.If synchronous rectification is broken down, can adjust the power output of transformer 10 makes charger
Output current be reduced to 0.5A, the loss Pmos=0.5A*0.7V=0.35W of the metal-oxide-semiconductor 20 of rectification so that now be only just
Normal 2 times, such that it is able to avoid rectification metal-oxide-semiconductor 20 from damaging.
Optionally, the step of turning down the output current of charger, can include：
The output current of charger is turned down to pre-set current value or zero current, wherein, the pre-set current value is more than zero.
Wherein, pre-set current value can be fixed value set in advance, or the output current value according to charger, by default rule
The current value for then determining, is not limited thereto.
So, in the embodiment of the present invention, whether rectification metal-oxide-semiconductor described in the detection electric circuit inspection is abnormal；If the detection
To the rectification metal-oxide-semiconductor exception, the control module turns down the power output of the transformer to electric circuit inspection, and then reduces charging
The output current of device.So, if the synchronous rectification is broken down causes rectification metal-oxide-semiconductor exception, circuit of synchronous rectification can be adjusted
The power output of low transformer, to reduce the output current of charger, so that the current reduction of rectification metal-oxide-semiconductor, prevents rectification
Metal-oxide-semiconductor is damaged.More than, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any ripe
Know those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of circuit of synchronous rectification, is applied to charger, the circuit of synchronous rectification include transformer and with the transformer
Output end connection rectification metal-oxide-semiconductor, it is characterised in that the circuit of synchronous rectification include also include detection circuit and control
Module, the detection circuit is used to detect whether the rectification metal-oxide-semiconductor is abnormal；The control module connects with the detection circuit
Connect, if turning down the power output of the transformer, and then drop to the rectification metal-oxide-semiconductor exception for the detection electric circuit inspection
The output current of the low charger.
2. circuit of synchronous rectification as claimed in claim 1, it is characterised in that the detection circuit includes controller, the control
One terminal of device processed is connected with the control module, the drain electrode of the rectification metal-oxide-semiconductor and the one of the vice-side winding of the transformer
End connection, source electrode is connected with load, and grid is connected with the another terminal of the controller, and the controller is used to detect described whole
Flow the drive signal of the grid of metal-oxide-semiconductor.
3. circuit of synchronous rectification as claimed in claim 1, it is characterised in that the detection circuit includes thermistor, described
Thermistor is set near the rectification metal-oxide-semiconductor, and the thermistor is connected with the control module, and the thermistor is used
In the temperature for detecting the rectification metal-oxide-semiconductor.
4. the circuit of synchronous rectification as described in any one in claims 1 to 3, it is characterised in that the circuit of synchronous rectification
Also include sample resistance, the sample resistance is series between the transformer and load.
5. circuit of synchronous rectification as claimed in claim 4, it is characterised in that the circuit of synchronous rectification is also opened including control
Close, the controlling switch is located between the vice-side winding of the transformer and the load and is connected with the sample resistance, institute
Controlling switch is stated to be connected with the control module.
6. a kind of charger, it is characterised in that including the circuit of synchronous rectification as described in any one in claim 1 to 5.
7. a kind of guard method of charger, is applied to be provided with the charger of circuit of synchronous rectification, the circuit of synchronous rectification
The rectification metal-oxide-semiconductor being connected including transformer and with the output end of the transformer, it is characterised in that the circuit of synchronous rectification is also
Including detection circuit and control module, the detection circuit is connected with the control module, and methods described includes：
Whether rectification metal-oxide-semiconductor described in the detection electric circuit inspection is abnormal；
If described detect electric circuit inspection to the rectification metal-oxide-semiconductor exception, the control module turns down the output work of the transformer
Rate, and then reduce the output current of the charger.
8. the guard method of charger as claimed in claim 7, it is characterised in that rectification described in the detection electric circuit inspection
The whether abnormal step of metal-oxide-semiconductor, including：
Whether the grid of rectification metal-oxide-semiconductor has drive signal described in the detection electric circuit inspection, if the grid of the rectification metal-oxide-semiconductor does not have
There is drive signal, determine the rectification metal-oxide-semiconductor exception.
9. the guard method of charger as claimed in claim 7, it is characterised in that rectification described in the detection electric circuit inspection
Whether metal-oxide-semiconductor is in abnormal step, including：
Whether the temperature of rectification metal-oxide-semiconductor described in the detection electric circuit inspection exceeds preset temperature value, if the temperature of the rectification metal-oxide-semiconductor
Degree exceeds the preset temperature value, determines the rectification metal-oxide-semiconductor exception.
10. the guard method of the charger as described in any one in claim 7 to 9, it is characterised in that described in the reduction
The step of output current of charger, including：
The output current of the charger is reduced to pre-set current value or zero current, wherein, the pre-set current value is more than zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710112576.0A CN106712483B (en) | 2017-02-28 | 2017-02-28 | A kind of guard method of circuit of synchronous rectification, charger and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710112576.0A CN106712483B (en) | 2017-02-28 | 2017-02-28 | A kind of guard method of circuit of synchronous rectification, charger and charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106712483A true CN106712483A (en) | 2017-05-24 |
| CN106712483B CN106712483B (en) | 2019-01-22 |
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ID=58917765
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710112576.0A Active CN106712483B (en) | 2017-02-28 | 2017-02-28 | A kind of guard method of circuit of synchronous rectification, charger and charger |
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| Country | Link |
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| CN (1) | CN106712483B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429833A (en) * | 2019-08-13 | 2019-11-08 | 纽福克斯光电科技（上海）有限公司 | A kind of circuit of synchronous rectification of charger |
| CN111521952A (en) * | 2020-05-08 | 2020-08-11 | 红河学院 | Synchronous rectification circuit, charger and synchronous rectification circuit control method and system |
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| CN1333592A (en) * | 2000-07-07 | 2002-01-30 | 深圳市华为电气技术有限公司 | Counter exciting synchronous rectification DC/DC converter protector |
| US6975521B1 (en) * | 2001-07-18 | 2005-12-13 | Sony Corporation | Switching power supply apparatus |
| CN101527525A (en) * | 2009-04-08 | 2009-09-09 | 李成勇 | Synchronous rectification external drive proposal |
| CN105939122A (en) * | 2015-03-02 | 2016-09-14 | 富士电机株式会社 | Switching power supply device |
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| CN1333592A (en) * | 2000-07-07 | 2002-01-30 | 深圳市华为电气技术有限公司 | Counter exciting synchronous rectification DC/DC converter protector |
| US6975521B1 (en) * | 2001-07-18 | 2005-12-13 | Sony Corporation | Switching power supply apparatus |
| CN101527525A (en) * | 2009-04-08 | 2009-09-09 | 李成勇 | Synchronous rectification external drive proposal |
| CN105939122A (en) * | 2015-03-02 | 2016-09-14 | 富士电机株式会社 | Switching power supply device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110429833A (en) * | 2019-08-13 | 2019-11-08 | 纽福克斯光电科技（上海）有限公司 | A kind of circuit of synchronous rectification of charger |
| CN111521952A (en) * | 2020-05-08 | 2020-08-11 | 红河学院 | Synchronous rectification circuit, charger and synchronous rectification circuit control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106712483B (en) | 2019-01-22 |
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