CN106793351A - A kind of wide input voltage phase-cut dimming power supply - Google Patents
A kind of wide input voltage phase-cut dimming power supply Download PDFInfo
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- CN106793351A CN106793351A CN201710195106.5A CN201710195106A CN106793351A CN 106793351 A CN106793351 A CN 106793351A CN 201710195106 A CN201710195106 A CN 201710195106A CN 106793351 A CN106793351 A CN 106793351A
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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]
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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]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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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]
- H05B45/20—Controlling the colour of the light
- H05B45/24—Controlling the colour of the light using electrical feedback from LEDs or from LED modules
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention is disclosed and there is provided a kind of wide input voltage phase-cut dimming power supply, and it connects and is operated in integrally adjusting light circuit, and the integrally adjusting light circuit includes the power network power supply being sequentially connected（1）, phase-cut dimmer（2）, dimming power source（3）, LED（4）, power network power supply（1）By phase-cut dimmer（2）Input dimming power source（3）, dimming power source（3）To LED（4）Working power, dimming power source are provided（3）Including anti-jamming circuit（31）, active power-factor correction circuit（32）, circuit for power conversion（33）, light modulator maintain current circuit（34）, wide input voltage phase-cut dimming control circuit（35）, FET（Q1）, compared with prior art, the present invention can realize 90 305V input voltage ranges wide, meet global major part line voltage.And PWM control modes are used, and the brightness of the LED of control multiple color simultaneously can be realized, can compatible forward position, trailing edge dimmer.
Description
Technical field
The present invention relates to a kind of phase-cut dimming power supply, more particularly, to a kind of wide input voltage phase-cut dimming power supply.
Background technology
Phase-cut dimming has user installation to connect up conveniently and laid in Old building illuminating line and be transformed into and has light modulation
The advantages of illumination scheme of function is simple and use it is more and more.However, current phase-cut dimming power input voltage scope
All narrow, the phase-cut dimming power input voltage scope for being for example applicable the area such as China, Europe, Australia is all in 170-265V
It is interior, it is adaptable to which that the phase-cut dimming power input voltage scope in the area such as North America, Japan is all in the range of 90-130V, to lack one
Plant the phase-cut dimming power supply for being applied to the input voltage range of whole world major part power network in 90-305V.That uses now in addition cuts
What phase dimming power source had also realizes phase-cut dimming by the way of power adjusting, and the phase-cut dimming power supply of this mode has load
Power limit, can not simultaneously adjust various photochromic LEDs, the problems such as input voltage is narrow, the side of the use PWM controls also having
Formula, although can simultaneously adjust various photochromic LEDs, but control is produced due to the voltage magnitude of its collection input voltage
Signal, this mode can only be equally used in the phase-cut dimming power supply of narrow input voltage.
In sum other phase-cut dimming power supplys of the prior art exist bearing power limitation, can not be while adjusting various
The defect such as photochromic LED, input voltage range be narrow.
The content of the invention
Problem to be solved by this invention is to overcome the deficiencies in the prior art, there is provided it is a kind of bearing power is not limited,
Various photochromic LEDs, efficiency high and phase-cut dimmer compatibility can simultaneously be adjusted by force and 90-305V input electricity wide can be realized
The phase-cut dimming power supply of the advantages of pressure scope.
The technical scheme is that：A kind of wide input voltage phase-cut dimming power supply, it connects and is operated in integrally adjusting light
In circuit, the integrally adjusting light circuit includes the power network power supply, phase-cut dimmer, dimming power source, the LED that are sequentially connected,
The power network power supply is input into the dimming power source by the phase-cut dimmer, and the dimming power source is carried to the LED
For working power, the dimming power source includes anti-jamming circuit, active power-factor correction circuit, circuit for power conversion, tune
Light device maintains current circuit, wide input voltage phase-cut dimming control circuit, FET, the input of the anti-jamming circuit to connect
Connect the output end of the phase-cut dimmer, the output end connection active PFC electricity of the anti-jamming circuit
Road, light modulator maintain current circuit, wide input voltage phase-cut dimming to control the input of circuit, the active power factor school
The output end of positive circuit connects the input of the circuit for power conversion, and the output end of the circuit for power conversion is via the field
The control of effect pipe provides working power to the LED, and the control pole of the FET connects the wide input voltage and cuts
The output end of phase adjusting control circuit.
Wide input voltage phase-cut dimming control circuit includes diode I, diode II, resistance I, resistance II, compares
Device, a reference source, pwm signal change-over circuit, photoelectrical coupler, pwm signal adjustment circuit, the diode I, diode II are just
Pole connects the output two ends of the anti-jamming circuit respectively, and the diode I, the negative pole of diode II are connected and connect described
One end of resistance I, the other end of the resistance I connects one end, the anode of the comparator of the resistance II, the comparator
Negative terminal connect one end of a reference source, the other end of a reference source connects the other end, the circuit of the resistance II altogether
End, the power end connection VCC of the comparator, the output end of the comparator connects the input of the pwm signal change-over circuit
End, the output end of the pwm signal change-over circuit connects the luminous pipe end of the photoelectrical coupler, the three of the photoelectrical coupler
Pole pipe switch terminals connect the input of the pwm signal adjustment circuit, and the output end connection of the pwm signal adjustment circuit is described
The control pole of FET.
The wide input voltage phase-cut dimming control circuit can also include diode I, diode II, resistance I, resistance
IIth, resistance III, comparator, a reference source, photoelectrical coupler, pwm signal change-over circuit, pwm signal adjustment circuit, the diode
Ith, the positive pole of diode II connects the output two ends of the anti-jamming circuit, the diode I, the negative pole phase of diode II respectively
Connect and connect one end of the resistance I, the other end of the resistance I connects one end of the resistance II, the comparator
Anode, the negative terminal of the comparator connects one end of a reference source, and the other end of a reference source connects the resistance II
The other end, circuit holding altogether, the power end connection VCC of the comparator, the output end of the comparator connect the smooth thermocouple
The anode of the luminous pipe end of clutch, the negative terminal of the luminous pipe end of the photoelectrical coupler connects one end of the resistance III, described
The other end connection circuit holding altogether of resistance III, the triode switch end of the photoelectrical coupler connects the pwm signal conversion
The input of circuit, the output end of the pwm signal change-over circuit connects the input of the pwm signal adjustment circuit, described
The output end of pwm signal adjustment circuit connects the control pole of the FET.
The beneficial effects of the invention are as follows：Due to the present invention, it connects and is operated in integrally adjusting light circuit, the overall tune
Optical circuit includes the power network power supply, phase-cut dimmer, dimming power source, the LED that are sequentially connected, the power network power supply warp
Cross the phase-cut dimmer and be input into the dimming power source, the dimming power source provides working power, the light modulation to the LED
Power supply includes that anti-jamming circuit, active power-factor correction circuit, circuit for power conversion, light modulator maintain current circuit, width
Input voltage phase-cut dimming control circuit, FET, the input of the anti-jamming circuit connect the phase-cut dimmer
Output end, the output end of the anti-jamming circuit connects the active power-factor correction circuit, light modulator and maintains electric current electricity
Road, wide input voltage phase-cut dimming control the input of circuit, the output end connection of the active power-factor correction circuit
The input of the circuit for power conversion, the output end of the circuit for power conversion is via the control of the FET to described
LED provides working power, and the control pole of the FET connects the defeated of the wide input voltage phase-cut dimming control circuit
Go out end.The active power-factor correction circuit can play PFC, for the circuit for power conversion provides stabilization
Operating voltage effect, and the requirement of wide input voltage range can be realized, coordinate the wide input voltage phase-cut dimming
Control circuit, the present invention is the wide input voltage that the wide input voltage phase-cut dimming power supply can be easily achieved 90-305V, and
The wide input voltage phase-cut dimming control circuit uses the PWM way of outputs, can realize while adjusting various photochromic LEDs
Function；The active power-factor correction circuit coordinates the circuit for power conversion also to allow the wide input voltage cut
Dimming power source is easily achieved efficiency high, High Power Factor.
Brief description of the drawings
Fig. 1 is system architecture block diagram of the invention；
Fig. 2 is the circuit diagram of the embodiment of the present invention 1；
Fig. 3 is the circuit diagram of the embodiment of the present invention 2.
Specific embodiment
As shown in Figure 1 to Figure 3, a kind of wide input voltage phase-cut dimming power supply, it connects and is operated in integrally adjusting light circuit
In, the integrally adjusting light circuit includes the power network power supply 1, phase-cut dimmer 2, dimming power source 3, the LED 4 that are sequentially connected,
The power network power supply 1 is input into the dimming power source 3 by the phase-cut dimmer 2, and the light adjusting circuit 3 is to the LED
Lamp 4 provides working power, and the dimming power source 3 includes that anti-jamming circuit 31, active power-factor correction circuit 32, power turn
Change circuit 33, light modulator and maintain current circuit 34, wide input voltage phase-cut dimming control circuit 35, FET Q1, it is described anti-
Disturb the output end of the input connection phase-cut dimmer 2 of circuit 31, the output end connection institute of the anti-jamming circuit 31
State active power-factor correction circuit 32, light modulator and maintain current circuit 34, wide input voltage phase-cut dimming control circuit 35
Input, the output end of the active power-factor correction circuit 32 connects the input of the circuit for power conversion 33,
The output end of the circuit for power conversion 33 provides working power, institute via the control of the FET Q1 to the LED 4
The control pole for stating FET Q1 connects the output end that the wide input voltage phase-cut dimming controls circuit 35.
As shown in Fig. 2 the control circuit 35 of wide input voltage phase-cut dimming described in the present embodiment 1 includes the D1 of diode I, two
The D2 of pole pipe II, the R1 of resistance I, the R2 of resistance II, comparator U1, a reference source Ref, pwm signal change-over circuit 351, photoelectrical coupler U2,
Pwm signal adjustment circuit 352, the D1 of the diode I, the positive pole of the D2 of diode II connect the defeated of the anti-jamming circuit 31 respectively
Go out two ends, the D1 of the diode I, the negative pole of the D2 of diode II are connected and connect one end of the R1 of the resistance I, the resistance I
The other end of R1 connects one end, the anode of the comparator U1 of the R2 of resistance II, the negative terminal connection institute of the comparator U1
One end of a reference source Ref is stated, the other end of a reference source Ref connects the other end, the circuit holding altogether of the R2 of resistance II, institute
The output end for stating power end the connection VCC, the comparator U1 of comparator U1 connects the defeated of the pwm signal change-over circuit 351
Enter end, the output end of the pwm signal change-over circuit 351 connects the luminous pipe end of the photoelectrical coupler U2, the smooth thermocouple
The triode switch end of clutch U2 connects the input of the pwm signal adjustment circuit 352, the pwm signal adjustment circuit 352
Output end connect the control pole of the FET Q1.
As shown in figure 3, the control circuit 35 of wide input voltage phase-cut dimming described in the present embodiment 2 can also include diode
I D1, the D2 of diode II, the R1 of resistance I, the R2 of resistance II, the R3 of resistance III, comparator U1, a reference source Ref, photoelectrical coupler U2, PWM
Signaling conversion circuit 351, pwm signal adjustment circuit 352, the D1 of the diode I, the positive pole of the D2 of diode II connect described respectively
The output two ends of anti-jamming circuit 31, the D1 of the diode I, the negative pole of the D2 of diode II are connected and connect the R1 of the resistance I
One end, the other end of the R1 of the resistance I connects one end, the anode of the comparator U1, the comparing of the R2 of resistance II
The negative terminal of device U1 connects one end of a reference source Ref, and the other end of a reference source Ref connects the another of the R2 of resistance II
End, circuit holding altogether, the output end of power end the connection VCC, the comparator U1 of the comparator U1 connect the smooth thermocouple
The anode of the luminous pipe end of clutch U2, the negative terminal of the luminous pipe end of the photoelectrical coupler U2 connects the one of the R3 of resistance III
End, the other end connection circuit holding altogether of the R3 of the resistance III, the triode switch end connection of the photoelectrical coupler U2 is described
Pwm signal change-over circuit（351）Input, the pwm signal change-over circuit（351）Output end connect the pwm signal
The input of adjustment circuit 352, the output end of the pwm signal adjustment circuit 352 connects the control pole of the FET Q1.
In the present embodiment, power network power supply 1 is by being input to the wide input voltage cut after the copped wave of phase-cut dimmer 2
The anti-jamming circuit 31 of dimming power source 3, the anti-jamming circuit 31 plays antisurge, reduces the effect such as electromagnetic interference, when
When the anti-jamming circuit 31 adds the leadage circuit being made up of electric capacity, resistant series, moreover it is possible to play the raising input electricity wide
Crush-cutting phase dimming power source 3 and the compatibility of phase-cut dimmer 2, pass through described by the AC power 1 after the copped wave of phase-cut dimmer 2
The active power-factor correction circuit 32, the light modulator are separately input to after anti-jamming circuit 31 and maintain current circuit 34
Circuit 35 is controlled with the wide input voltage phase-cut dimming, the active power-factor correction circuit 32 is carried out to power factor
Correction, reduces circuit total harmonic distortion, and the high voltage direct current of stabilization is provided for the circuit for power conversion 33, and the power turns
The direct current that circuit 33 changes one constant pressure of output or constant current by energy is changed, and is matched by FET Q1 supplies
LED 4, while also for the active power-factor correction circuit 32, the wide input voltage phase-cut dimming control circuit
35 grade circuits provide operating voltage.Due to the active power-factor correction circuit 32 for the circuit for power conversion 33 is provided
One voltage operating voltage higher, when the circuit for power conversion 33 is under Same Efficieney, relative operating current reduces,
When the circuit for power conversion 33 uses such as topological circuit such as quasi-resonance flyback, active clamped normal shock, LLC, LCC, full-bridge again
When, it is easy to realize efficient power conversion.The light modulator maintains current circuit 34 to be connected to the wide input voltage
The phase-cut dimmer 2 of phase-cut dimming power supply 3 is provided and maintains electric current, it is ensured that the steady operation of phase-cut dimmer 2, and can improve the width
Input voltage phase-cut dimming power supply 3 and leading edge dimmer and the compatibility of trailing edge dimmer.The wide input voltage phase-cut dimming
Control circuit 35 first by by being converted into the pwm signal with the alternating current same frequency after rectification after the AC rectification after copped wave,
The pulsewidth of pwm signal is influenceed by the phase width of alternating current after copped wave, and the alternating current phases after copped wave are narrower, the arteries and veins of pwm signal
Wide just smaller, the alternating current phases after copped wave are wider, and the pulsewidth of pwm signal is wider, therefore regulation phase-cut dimmer 2 changes exchange
Electric copped wave width, just influences the pulsewidth of this pwm signal, while the voltage amplitude of the pulsewidth of this pwm signal and alternating current does not have
There is direct relation, therefore the wide input voltage phase-cut dimming control circuit 35 can be made to meet input voltage range wide.It is described
Wide input voltage phase-cut dimming controls circuit 35 that this pwm signal is converted into pwm signal of the frequency more than or equal to 200Hz, turns
The controlled duty cycle of the pwm signal after changing is in the dutycycle of the pwm signal before conversion, the wide input voltage phase-cut dimming control
Pwm signal of the circuit 35 by frequency after conversion more than or equal to 200Hz is input to the grid of the FET Q1, goes control described
The switch periods of FET Q1, realize the output quantity of the control wide input voltage phase-cut dimming power supply 3, and realize control
The brightness of LED 4.
Embodiment 2 with embodiment 1 the comparator U1 produce pwm signal mode be as.Embodiment 2 and reality
Example 1 is applied compared to differing only in：Embodiment 1 is that the pwm signal for producing the comparator U1 changes electricity by the pwm signal
After pwm signal of the frequency more than or equal to 200Hz is changed out on road 351, frequency is more than or equal to by the photoelectrical coupler U2
The pwm signal of 200Hz is delivered to the pwm signal adjustment circuit of the primary side of wide input voltage phase-cut dimming power supply 3
352, and embodiment 2 is that the pwm signal that the comparator U1 is produced is first passed through into the photoelectrical coupler U2 to be delivered to the width
The pwm signal change-over circuit 351 of the primary side of input voltage phase-cut dimming power supply 3, the pwm signal change-over circuit 351 is again
Pwm signal of the frequency more than or equal to 200Hz is changed out, and is directly inputted to the pwm signal adjustment circuit 352.Briefly
It is exactly that pwm signal change-over circuit 351 described in embodiment 1 is placed on the primary side of wide input voltage phase-cut dimming power supply 3,
Before the photoelectrical coupler U2, the pwm signal change-over circuit 351 of the photoelectrical coupler U2 transmission is changed out
Pwm signal more than or equal to 200Hz.And pwm signal change-over circuit 351 described in embodiment 2 is placed on the wide input voltage and cuts
The primary side of phase dimming power source 3, behind the photoelectrical coupler U2, the photoelectrical coupler U2 transmission is the comparator
The pwm signal that U1 is produced.
Compared with prior art, the present invention can realize 90-305V input voltage ranges wide, meet global major part power network
Voltage.And PWM control modes are used, can realize while controlling the brightness of the LED of multiple color, the compatible forward position of energy, rear edge are adjusted
Light device.
Embodiment in above-mentioned is only preferably embodiment of the invention, and it does not limit to protection scope of the present invention, Ren He
Made an amendment in thinking of the invention, content, improved or equivalent is both fallen within claims of the invention.
Claims (3)
1. a kind of wide input voltage phase-cut dimming power supply, it connects and is operated in integrally adjusting light circuit, the integrally adjusting light electricity
Road includes the power network power supply being sequentially connected（1）, phase-cut dimmer（2）, dimming power source（3）, LED（4）, the power network confession
Power supply（1）By the phase-cut dimmer（2）It is input into the dimming power source（3）, the dimming power source（3）To the LED
（4）Working power is provided, it is characterised in that：The dimming power source（3）Including anti-jamming circuit（31）, active power factor school
Positive circuit（32）, circuit for power conversion（33）, light modulator maintain current circuit（34）, wide input voltage phase-cut dimming control circuit
（35）, FET（Q1）, the anti-jamming circuit（31）Input connect the phase-cut dimmer（2）Output end, institute
State anti-jamming circuit（31）Output end connect the active power-factor correction circuit（32）, light modulator maintain current circuit
（34）, wide input voltage phase-cut dimming control circuit（35）Input, the active power-factor correction circuit（32）'s
Output end connects the circuit for power conversion（33）Input, the circuit for power conversion（33）Output end via the field
Effect pipe（Q1）Control to the LED（4）Working power, the FET are provided（Q1）Control pole connect the width
Input voltage phase-cut dimming controls circuit（35）Output end.
2. wide input voltage phase-cut dimming power supply according to claim 1, it is characterised in that：The wide input voltage cut
Adjusting control circuit（35）Including diode I（D1）, diode II（D2）, resistance I（R1）, resistance II（R2）, comparator（U1）、
A reference source（Ref）, pwm signal change-over circuit（351）, photoelectrical coupler（U2）, pwm signal adjustment circuit（352）, two pole
Pipe I（D1）, diode II（D2）Positive pole connect the anti-jamming circuit respectively（31）Output two ends, the diode I
（D1）, diode II（D2）Negative pole be connected and connect the resistance I（R1）One end, the resistance I（R1）The other end
Connect the resistance II（R2）One end, the comparator（U1）Anode, the comparator（U1）Negative terminal connect the base
Quasi- source（Ref）One end, a reference source（Ref）The other end connect the resistance II（R2）The other end, circuit holding altogether,
The comparator（U1）Power end connection VCC, the comparator（U1）Output end connect the pwm signal change-over circuit
（351）Input, the pwm signal change-over circuit（351）Output end connect the photoelectrical coupler（U2）Luminous tube
End, the photoelectrical coupler（U2）Triode switch end connect the pwm signal adjustment circuit（352）Input, it is described
Pwm signal adjustment circuit（352）Output end connect the FET（Q1）Control pole.
3. wide input voltage phase-cut dimming power supply according to claim 1, it is characterised in that：The wide input voltage cut
Adjusting control circuit（35）Diode I can also be included（D1）, diode II（D2）, resistance I（R1）, resistance II（R2）, resistance
Ⅲ （R3）, comparator（U1）, a reference source（Ref）, photoelectrical coupler（U2）, pwm signal change-over circuit（351）, pwm signal adjust
Whole circuit（352）, the diode I（D1）, diode II（D2）Positive pole connect the anti-jamming circuit respectively（31）It is defeated
Go out two ends, the diode I（D1）, diode II（D2）Negative pole be connected and connect the resistance I（R1）One end, it is described
Resistance I（R1）The other end connect the resistance II（R2）One end, the comparator（U1）Anode, the comparator（U1）
Negative terminal connect a reference source（Ref）One end, a reference source（Ref）The other end connect the resistance II（R2）It is another
One end, circuit holding altogether, the comparator（U1）Power end connection VCC, the comparator（U1）Output end connection it is described
Photoelectrical coupler（U2）Luminous pipe end anode, the photoelectrical coupler（U2）The negative terminal of luminous pipe end connect the resistance
Ⅲ （R3）One end, the resistance III（R3）The other end connection circuit holding altogether, the photoelectrical coupler（U2）Three poles
Pipe switch terminals connect the pwm signal change-over circuit（351）Input, the pwm signal change-over circuit（351）Output end
Connect the pwm signal adjustment circuit（352）Input, the pwm signal adjustment circuit（352）Output end connection it is described
FET（Q1）Control pole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195106.5A CN106793351A (en) | 2017-03-29 | 2017-03-29 | A kind of wide input voltage phase-cut dimming power supply |
| US15/679,172 US9942959B1 (en) | 2017-03-29 | 2017-08-17 | Phase-cut dimmable power supply with wide input voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195106.5A CN106793351A (en) | 2017-03-29 | 2017-03-29 | A kind of wide input voltage phase-cut dimming power supply |
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| Publication Number | Publication Date |
|---|---|
| CN106793351A true CN106793351A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710195106.5A Pending CN106793351A (en) | 2017-03-29 | 2017-03-29 | A kind of wide input voltage phase-cut dimming power supply |
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| CN114615776A (en) * | 2022-03-09 | 2022-06-10 | 珠海市圣昌电子有限公司 | Power supply overheating protection staged load reduction method and system |
| CN116017805A (en) * | 2023-02-21 | 2023-04-25 | 珠海市圣昌电子有限公司 | Circuit for reducing power consumption and electromagnetic interference of phase-cut dimming power supply |
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Application publication date: 20170531 |
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