CN108419330A - A kind of quick turn-on start-up circuit and driving power - Google Patents
A kind of quick turn-on start-up circuit and driving power Download PDFInfo
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- CN108419330A CN108419330A CN201810110920.7A CN201810110920A CN108419330A CN 108419330 A CN108419330 A CN 108419330A CN 201810110920 A CN201810110920 A CN 201810110920A CN 108419330 A CN108419330 A CN 108419330A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The present invention relates to a kind of quick turn-on start-up circuit and driving power, including PFC inductance, PFC inductance includes primary side winding, further includes：The auxiliary winding being adapted to the primary side winding of PFC inductance, the current rectifying and wave filtering circuit being connect with auxiliary winding and the switching circuit being connect with current rectifying and wave filtering circuit；In booting, auxiliary winding and switching circuit conducting, auxiliary winding generates boost voltage and boost voltage is transmitted to current rectifying and wave filtering circuit, current rectifying and wave filtering circuit exports VCC voltages after carrying out rectifying and wave-filtering processing to boost voltage, and VCC voltages are sent to master control IC by switching circuit, control master control IC starts.The present invention can when driving power is switched on quickly and stably startup power supply, and internal power device is automatically closed after power supply normally starts, reduces loss, circuit structure is simple, good reliability.
Description
Technical field
The present invention relates to the technical fields of power supply, more specifically to a kind of quick turn-on start-up circuit and driving electricity
Source.
Background technology
LED gradually replaces traditional lighting source, is had been more and more widely used in each lighting area.With
The growing of social and economic construction, urban road basis illumination construction level has become urban development speed speed and water
The important symbol of flat height is also related to energy saving whether illuminating engineering quality good or not only influences the safety of vehicle and pedestrian
Can environmental objective be realized.Current China's road lighting energy consumption is extremely serious, and existing main problem has illumination system layout super
Mark, lighting control mode are backward, lighting energy saving theory is wrong, lighting energy saving measure is single, it is often more important that abnormal protection occur
The problem of etc..It is known that outdoor lighting is no matter weather is that sunny day or thundery sky are required and can be worked normally, especially
Remote districts.The LED power output as caused by the fluctuation of network voltage is unstable, leads to whole lamp cisco unity malfunction.
LED illumination driving power necessarily becomes industry focus of attention, to which people require can have high-performance high reliability
LED drive power escort for people’s lives.However, the characteristic that existing LED drive power is designed due to itself, warp
It is commonly present the problem that booting is slow, booting is unstable and loss is big.
Invention content
The technical problem to be solved in the present invention is, for the drawbacks described above of the prior art, provides a kind of quick turn-on and opens
Dynamic circuit and driving power.
The technical solution adopted by the present invention to solve the technical problems is：A kind of quick turn-on start-up circuit is constructed, including
PFC inductance, the PFC inductance includes primary side winding, further includes：The auxiliary winding that is adapted to the primary side winding of the PFC inductance,
The current rectifying and wave filtering circuit being connect with the auxiliary winding and the switching circuit being connect with the current rectifying and wave filtering circuit；
In booting, the auxiliary winding and switching circuit conducting, the auxiliary winding generate boost voltage and will
The boost voltage is transmitted to the current rectifying and wave filtering circuit, and the current rectifying and wave filtering circuit carries out rectifying and wave-filtering to the boost voltage
VCC voltages are exported after processing, and the VCC voltages are sent to master control IC by the switching circuit, control the master control IC
Start.
Preferably, the current rectifying and wave filtering circuit includes：Coupled capacitor C1 and rectification circuit；
The one end the coupled capacitor C1 is connect with one end of the auxiliary winding, the coupled capacitor C1 other ends with it is described
The first end of rectification circuit connects, and the second end of the rectification circuit and the other end of the auxiliary winding are grounded jointly, described
The third end of rectification circuit is connect with the input terminal of the switching circuit.
Preferably, the rectification circuit includes the first diode D1 and the second diode D2；
The connecting pin of the anode of the cathode of the first diode D1 and the D2 of second diode is as the rectification
The first end of circuit is connect with the other end of the coupled capacitor C1, and the cathode of the second diode D2 is as the rectified current
The third end on road is connect with the switching circuit；
The other end of second end and the auxiliary winding of the anode of the first diode D1 as the rectification circuit
Common ground connection.
Preferably, the switching circuit includes VCC output ends and feeder ear；
The switching circuit further includes that the first control switch and the second control switch；
The input terminal of the first control switch is connected to the rectification circuit as the input terminal of the switching circuit
The output end at third end, the first control switch is connect as the VCC output ends of the switching circuit with the master control IC, institute
The other end for stating the first control switch is also connect with the first end of the second control switch, and the second of the second control switch
The feeder ear as the switching circuit is held to be connect with the auxiliary winding of power supply main transformer.
Preferably, the first control switch includes biasing circuit, clamp circuit and second switch pipe；
Described biasing circuit one end is connect with the second end of the second switch pipe, and the biasing circuit and described second
The connecting pin of the second end of switching tube is connected to the third end of the rectification circuit as the input terminal of the first control switch,
The biasing circuit other end is grounded by the clamp circuit, the other end of the biasing circuit also with the second switch pipe
First end connection；
The first end of the second switch pipe is connected to second control as the other end of the first control switch
The third end of the first end of switch, the second switch pipe connects as the output end of the first control switch with the master control IC
It connects.
Preferably, the second switch pipe includes metal-oxide-semiconductor Q2, and the grid of the metal-oxide-semiconductor Q2 is the second switch pipe
First end, the source electrode of the metal-oxide-semiconductor Q2 are the second end of the second switch pipe, and the drain electrode of the metal-oxide-semiconductor Q2 is described second
The third end of switching tube.
Preferably, the clamp circuit includes voltage-stablizer ZD1, and cathode and the biasing circuit of the voltage-stablizer ZD1 connect
It connects, the plus earth of the voltage-stablizer ZD1.
Preferably, the second control switch includes：First switch pipe and resistance R2；
The first end of the first switch pipe is connected to the power supply main transformer as the feeder ear of the switching circuit
Auxiliary winding, the first end of the first switch pipe also passes through resistance R2 ground connection, the second end of the first switch pipe
First end as the second control switch is connected to the first control switch, the third termination of the first switch pipe
Ground.
Preferably, the first switch pipe includes triode Q1, and the base stage of the triode Q1 is the first switch pipe
First end, the second end of the extremely described first switch pipe of current collection of the triode Q1, the transmitting of the triode Q1 is extremely
The third end of the first switch pipe.
The present invention also provides a kind of driving powers, including above-described quick turn-on start-up circuit.
The quick turn-on start-up circuit for implementing the present invention, has the advantages that：The present invention in PFC inductance by increasing
Auxiliary winding can be such that switching circuit is connected rapidly, in turn by auxiliary winding when power supply is switched on directly to switching circuit power supply
VCC voltages can be provided to the master control IC of power supply by switching circuit, so that power supply is quickly and stably started, and in power supply
After normal startup, internal power device can be automatically closed in this circuit, greatly reduce the loss of power supply, promote power-efficient, electricity
Line structure is simple, good reliability.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is a kind of structural schematic diagram of quick turn-on start-up circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of quick turn-on start-up circuit provided in an embodiment of the present invention.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific implementation mode of the present invention.
Refering to fig. 1, Fig. 1 is a kind of structural schematic diagram of quick turn-on start-up circuit provided in an embodiment of the present invention.Such as figure
Shown, the quick turn-on start-up circuit of the embodiment can be applied to LED drive power, can specifically include：PFC inductance, PFC
Inductance includes primary side winding, further includes：It is connect with the auxiliary winding of the primary side winding of PFC inductance adaptation, with auxiliary winding whole
Stream filter circuit 10 and the switching circuit 20 being connect with current rectifying and wave filtering circuit 10；
In booting, auxiliary winding and switching circuit 20 are connected, and auxiliary winding generates boost voltage and passes boost voltage
Current rectifying and wave filtering circuit 10 is transported to, current rectifying and wave filtering circuit 10 exports VCC voltages after carrying out rectifying and wave-filtering processing to boost voltage, and will
VCC voltages are sent to master control IC by switching circuit 20, and control master control IC starts.
The present invention passes through auxiliary winding and primary side winding by increasing auxiliary winding in PFC inductance in power supply booting moment
Energy relationship corresponding voltage and 10 rectification of rectified filter circuit are directly generated by auxiliary winding in power supply booting moment
Afterwards, it generates and may be adapted to the startup voltage that power supply master control IC normally starts, i.e. VCC voltages, achieved the purpose that quick turn-on starts.
In addition, when flowing through PFC inductance due to the surge caused by booting moment or other electric currents, it is generated on PFC inductance
Electromotive force be variation, correspondingly, institute increased auxiliary winding on generated electromotive force be also change, therefore, by setting
It counts current rectifying and wave filtering circuit 10 and rectifying and wave-filtering processing is carried out to produced voltage signal, can avoid booting moment surge or electric current to master
The impact for controlling IC, is effectively protected master control IC, and can make the reliable and stable startups of master control IC.
In the embodiment of the present invention, current rectifying and wave filtering circuit 10 may include：Coupled capacitor C1 and rectification circuit 101.
The one end coupled capacitor C1 and one end of auxiliary winding connect, and the of the coupled capacitor C1 other ends and rectification circuit 101
One end connects, and the second end of rectification circuit 101 and the other end of auxiliary winding be grounded jointly, the third end of rectification circuit 101 with
The input terminal of switching circuit 20 connects.
Preferably, rectification circuit 101 may include：First diode D1 and the second diode D2.
The connecting pin of the anode of the cathode of first diode D1 and the D2 of the second diode as rectification circuit 101 first
End is connect with the other end of coupled capacitor C1, and the cathode of the second diode D2 is electric as the third end of rectification circuit 101 and switch
Road 20 connects；The anode of first diode D1 is grounded jointly as the second end of rectification circuit 101 and the other end of auxiliary winding.
In the embodiment of the present invention, switching circuit 20 may include VCC output ends and feeder ear；Switching circuit 20 further includes
One control switch 21 and second controls switch 22.
The input terminal of first control switch 21 is connected to the third of rectification circuit 101 as the input terminal of switching circuit 20
The output end at end, the first control switch 21 is connect as the VCC output ends of switching circuit 20 with master control IC, the first control switch 21
The other end also with second control switch 22 first end connect, second control switch 22 second end as switching circuit 20
Feeder ear is connect with the auxiliary winding of power supply main transformer.
Optionally, the first control switch 21 includes biasing circuit 211, clamp circuit 213 and second switch pipe 212.
211 one end of biasing circuit is connect with the second end of second switch pipe 212, and biasing circuit 211 and second switch pipe
The connecting pin of 212 second end is connected to the third end of rectification circuit 101, biased electrical as the input terminal of the first control switch 21
211 other end of road is grounded by clamp circuit 213, and the other end of biasing circuit 211 also connects with the first end of second switch pipe 212
It connects；The first end of second switch pipe 212 is connected to the first of the second control switch 22 as the other end of the first control switch 21
The third end at end, second switch pipe 212 is connect as the output end of the first control switch 21 with master control IC.
Preferably, second switch pipe 212 includes metal-oxide-semiconductor Q2, and the grid of metal-oxide-semiconductor Q2 is the first end of second switch pipe 212,
The source electrode of metal-oxide-semiconductor Q2 is the second end of second switch pipe 212, and the drain electrode of metal-oxide-semiconductor Q2 is the third end of second switch pipe 212.
In the embodiment of the present invention, clamp circuit 213 can be realized by voltage-stablizer, specifically, may include voltage-stablizer ZD1,
The cathode of voltage-stablizer ZD1 is connect with biasing circuit 211, the plus earth of voltage-stablizer ZD1.Optionally, voltage-stablizer ZD1 can be
TL431 voltage-stablizers.
Alternatively, biasing circuit 211 can be realized by biasing resistor, can be to metal-oxide-semiconductor Q2's by the way that biasing resistor is arranged
Base stage provides bias voltage can fast conducting to control metal-oxide-semiconductor Q2.
In the embodiment of the present invention, the second control switch 22 includes：First switch pipe 221 and resistance R2；
The first end of first switch pipe 221 as the feeder ear of switching circuit 20 be connected to the auxiliary of power supply main transformer around
The first end of group, first switch pipe 221 is also grounded by resistance R2, and the second end of first switch pipe 221 is opened as the second control
The first end for closing 22 is connected to the first control switch 21, the third end ground connection of first switch pipe 221.
Alternatively, first switch pipe 221 includes triode Q1, and the base stage of triode Q1 is the of first switch pipe 221
One end, the second end of the current collection extremely first switch pipe 221 of triode Q1, the transmitting extremely first switch pipe 221 of triode Q1
Third end.
Referring to Fig.2, Fig. 2 is a kind of circuit diagram of quick turn-on start-up circuit provided in an embodiment of the present invention.The embodiment
For the circuit of LLC topologys, which can effectively accelerate AC and start the time.
As shown in Fig. 2, current rectifying and wave filtering circuit 10 include coupled capacitor C1, rectification circuit 101 include the first diode D1 and
Second diode D2, biasing circuit 211 include metal-oxide-semiconductor Q2 including biasing resistor R1, second switch pipe 212, and clamp circuit 213 wraps
Voltage-stablizer ZD1 is included, first switch pipe 221 includes triode Q1, further includes the first filter capacitor C2, the second filter capacitor CE2, opens
The VCC output ends on powered-down road 20 are VCC1, and the feeder ear of switching circuit 20 is VCC2, increased PFC inductance auxiliary winding
For L1.
The one end auxiliary winding L1 is connect by coupled capacitor C1 with the anode of the second diode D2, the auxiliary winding L1 other ends
It connect, and is connected to the ground with the anode of the first diode D1；The cathode of first diode D1 and coupled capacitor C1 and the two or two pole
The connecting node of the anode of pipe D2 connects, and the first filter capacitor C1 is connected in parallel on the cathode and the first diode D1 of the second diode D2
Anode between.The cathode of second diode D2 is connected to the source electrode of metal-oxide-semiconductor Q2 as the third end of rectification circuit 101, and second
The cathode of diode D2 is also connect by biasing resistor R1 with the grid of metal-oxide-semiconductor Q2 with the end that is connected in series with of the source electrode of metal-oxide-semiconductor Q2,
The grid of metal-oxide-semiconductor Q2 is also grounded by voltage-stablizer ZD1, and the grid of metal-oxide-semiconductor Q2 is also connect with the collector of triode Q1, metal-oxide-semiconductor
It (is specially the high voltage startup with master control IC that the drain electrode of Q2, which is connect as the VCC output ends (VCC1) of switching circuit 20 with master control IC,
Pin connects), the drain electrode of metal-oxide-semiconductor Q2 also passes through the second filter capacitor CE2 ground connection.
The emitter of triode Q1 is grounded, and the base stage of triode Q1 is grounded by resistance R2, base stage and the electricity of triode Q1
The end that is connected in series with of resistance R2 is connect as the feeder ear (VCC2) of switching circuit 20 with the auxiliary winding of the main transformer of power supply.
The concrete operating principle of the embodiment of the present invention is described further by taking Fig. 2 as an example.
In power supply booting moment, the coupled capacitance C1 of boost voltage, the second diode D2 are whole caused by auxiliary winding L1
After stream, a bias voltage is provided to the grid of metal-oxide-semiconductor Q2 by biasing resistor R1, the grid of metal-oxide-semiconductor Q2 is received to the biased electrical
After pressure, i.e., rapid conducting, and then will be rectified after VCC voltages be transmitted to the high voltage startup of master control IC rapidly by VCC1 and draw
Foot, master control IC start rapidly, wherein setting the first filter capacitor C2 and the second filter capacitor CE2 can filter out the dry of VCC voltages
Signal is disturbed, makes to be supplied to the VCC voltages of master control IC more to be stablized, master control IC steadily can reliably start.
After circuit quickly starts, at this point, the shutdown voltage provided by the auxiliary winding of main transformer is through feeder ear VCC2
After carrying out current limliting by resistance R2, the base stage of triode Q1 is made to can get the conducting voltage turned it on, triode Q1 conductings.When three
The grid of metal-oxide-semiconductor Q2 is shorted to ground when pole pipe Q1 conductings, at this point, metal-oxide-semiconductor Q2 can not be connected, metal-oxide-semiconductor Q2 is in cut-off state.
Greatly reduce the working loss of circuit, i.e., after circuit quickly starts, the power device of quick turn-on start-up circuit of the invention
Part is in cut-off state, does not generate loss, saves energy, improves the efficiency of power supply.
The invention also discloses a kind of driving powers, including quick turn-on start-up circuit above-mentioned.The driving power passes through
Above-mentioned quick turn-on start-up circuit is designed, both can reach mesh that is quick, stablizing starting up's power supply in power supply booting moment
, and the power device inside circuit can be automatically closed after power supply normally starts, avoid power device from generating loss, greatly
The big loss for reducing circuit, improves the overall efficiency of power supply.
Above example only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand present disclosure and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The equivalent changes and modifications that range is done are sought, the covering scope of the claims in the present invention should all be belonged to.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of quick turn-on start-up circuit, including PFC inductance, the PFC inductance includes primary side winding, which is characterized in that also
Including：The auxiliary winding that is adapted to the primary side winding of the PFC inductance, the current rectifying and wave filtering circuit being connect with the auxiliary winding with
And the switching circuit being connect with the current rectifying and wave filtering circuit；
In booting, the auxiliary winding and switching circuit conducting, the auxiliary winding generate boost voltage and will be described
Boost voltage is transmitted to the current rectifying and wave filtering circuit, and the current rectifying and wave filtering circuit carries out rectifying and wave-filtering processing to the boost voltage
VCC voltages are exported afterwards, and the VCC voltages are sent to master control IC by the switching circuit, are controlled the master control IC and are started.
2. quick turn-on start-up circuit according to claim 1, which is characterized in that the current rectifying and wave filtering circuit includes：Coupling
Close capacitance C1 and rectification circuit；
The one end the coupled capacitor C1 is connect with one end of the auxiliary winding, the coupled capacitor C1 other ends and the rectification
The first end of circuit connects, and the second end of the rectification circuit and the other end of the auxiliary winding are grounded jointly, the rectification
The third end of circuit is connect with the input terminal of the switching circuit.
3. quick turn-on start-up circuit according to claim 2, which is characterized in that the rectification circuit includes the one or two pole
Pipe D1 and the second diode D2；
The connecting pin of the anode of the cathode of the first diode D1 and the D2 of second diode is as the rectification circuit
First end connect with the other end of the coupled capacitor C1, the cathode of the second diode D2 is as the rectification circuit
Third end is connect with the switching circuit；
The other end of second end and the auxiliary winding of the anode of the first diode D1 as the rectification circuit is common
Ground connection.
4. quick turn-on start-up circuit according to claim 2, which is characterized in that the switching circuit includes VCC outputs
End and feeder ear；
The switching circuit further includes that the first control switch and the second control switch；
The input terminal of the first control switch is connected to the third of the rectification circuit as the input terminal of the switching circuit
The output end at end, the first control switch is connect as the VCC output ends of the switching circuit with the master control IC, and described the
The other end of one control switch is also connect with the first end of the second control switch, and the second end of the second control switch is made
It is connect with the auxiliary winding of power supply main transformer for the feeder ear of the switching circuit.
5. quick turn-on start-up circuit according to claim 4, which is characterized in that the first control switch includes biasing
Circuit, clamp circuit and second switch pipe；
Described biasing circuit one end is connect with the second end of the second switch pipe, and the biasing circuit and the second switch
The connecting pin of the second end of pipe is connected to the third end of the rectification circuit as the input terminal of the first control switch, described
The biasing circuit other end is grounded by the clamp circuit, the other end of the biasing circuit also with the second switch pipe
One end connects；
The first end of the second switch pipe is connected to the second control switch as the other end of the first control switch
First end, the third end of the second switch pipe is connect as the output end of the first control switch with the master control IC.
6. quick turn-on start-up circuit according to claim 5, which is characterized in that the second switch pipe includes metal-oxide-semiconductor
The grid of Q2, the metal-oxide-semiconductor Q2 are the first end of the second switch pipe, and the source electrode of the metal-oxide-semiconductor Q2 is the second switch
The second end of pipe, the drain electrode of the metal-oxide-semiconductor Q2 are the third end of the second switch pipe.
7. quick turn-on start-up circuit according to claim 5, which is characterized in that the clamp circuit includes voltage-stablizer
The cathode of ZD1, the voltage-stablizer ZD1 are connect with the biasing circuit, the plus earth of the voltage-stablizer ZD1.
8. quick turn-on start-up circuit according to claim 4, which is characterized in that second control, which switchs, includes：The
One switching tube and resistance R2；
The first end of the first switch pipe is connected to the auxiliary of the power supply main transformer as the feeder ear of the switching circuit
Winding, the first end of the first switch pipe is helped also to be grounded by the resistance R2, the second end conduct of the first switch pipe
The first end of the second control switch is connected to the first control switch, the third end ground connection of the first switch pipe.
9. quick turn-on start-up circuit according to claim 8, which is characterized in that the first switch pipe includes triode
The base stage of Q1, the triode Q1 are the first end of the first switch pipe, the current collection extremely described first of the triode Q1
The second end of switching tube, the third end of the extremely described first switch pipe of transmitting of the triode Q1.
10. a kind of driving power, which is characterized in that including claim 1-9 any one of them quick turn-on start-up circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110920.7A CN108419330B (en) | 2018-02-05 | 2018-02-05 | A kind of quick turn-on start-up circuit and driving power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110920.7A CN108419330B (en) | 2018-02-05 | 2018-02-05 | A kind of quick turn-on start-up circuit and driving power |
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| Publication Number | Publication Date |
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| CN108419330A true CN108419330A (en) | 2018-08-17 |
| CN108419330B CN108419330B (en) | 2019-06-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8723439B2 (en) * | 2010-05-07 | 2014-05-13 | Huizhou Light Engine Limited | Triac dimmable power supply unit for LED |
| CN103826362A (en) * | 2014-01-28 | 2014-05-28 | 杰华特微电子（杭州）有限公司 | LED drive circuit and control method thereof |
| CN104378888A (en) * | 2014-11-21 | 2015-02-25 | 佛山冠今光电科技有限公司 | Simple silicon-controlled dimming LED driving power supply with high-PFC structure |
| CN206442289U (en) * | 2016-12-27 | 2017-08-25 | 深圳市思坎普科技有限公司 | A kind of Switching Power Supply low-power consumption fast start circuit |
| CN107346936A (en) * | 2016-05-06 | 2017-11-14 | 百富(澳门离岸商业服务)有限公司 | With the Switching Power Supply start-up circuit for providing the normal open device for starting charging current |
-
2018
- 2018-02-05 CN CN201810110920.7A patent/CN108419330B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8723439B2 (en) * | 2010-05-07 | 2014-05-13 | Huizhou Light Engine Limited | Triac dimmable power supply unit for LED |
| CN103826362A (en) * | 2014-01-28 | 2014-05-28 | 杰华特微电子（杭州）有限公司 | LED drive circuit and control method thereof |
| CN104378888A (en) * | 2014-11-21 | 2015-02-25 | 佛山冠今光电科技有限公司 | Simple silicon-controlled dimming LED driving power supply with high-PFC structure |
| CN107346936A (en) * | 2016-05-06 | 2017-11-14 | 百富(澳门离岸商业服务)有限公司 | With the Switching Power Supply start-up circuit for providing the normal open device for starting charging current |
| CN206442289U (en) * | 2016-12-27 | 2017-08-25 | 深圳市思坎普科技有限公司 | A kind of Switching Power Supply low-power consumption fast start circuit |
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| Publication number | Publication date |
|---|---|
| CN108419330B (en) | 2019-06-14 |
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