CN107734757A - A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation - Google Patents

A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation Download PDF

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Publication number
CN107734757A
CN107734757A CN201711050195.0A CN201711050195A CN107734757A CN 107734757 A CN107734757 A CN 107734757A CN 201711050195 A CN201711050195 A CN 201711050195A CN 107734757 A CN107734757 A CN 107734757A
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China
Prior art keywords
triode
resistance
polar capacitor
pins
voltage
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Pending
Application number
CN201711050195.0A
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Chinese (zh)
Inventor
黄涛
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Chengdu Lei Keer Science And Technology Ltd
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Chengdu Lei Keer Science And Technology Ltd
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Priority to CN201711050195.0A priority Critical patent/CN107734757A/en
Publication of CN107734757A publication Critical patent/CN107734757A/en
Pending legal-status Critical Current

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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]
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • 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]
    • 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
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation; it is characterized in that; mainly by control chip U2, transformer T, short-circuit protective circuit of voltage regulation; diode rectifier U1; polar capacitor C1, polar capacitor C2, voltage-regulator diode D1; the phase adjusting circuit being connected with control chip U2, and the voltage conditioning output circuit composition being connected respectively with control chip U2 and diode rectifier U1；The present invention can be to input voltage and electric current pulse dynamic be adjusted, and the present invention can also be adjusted to the intensity of output voltage and electric current, ensure that the stability for the voltage and current that the present invention exports, the stability of light-operated LED (liquid crystal diode) lamp brightness effectively is ensure that, and improves the service life of LED.

Description

A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation
Technical field
It is a kind of based on the light-operated of short-circuit protective circuit of voltage regulation specifically the present invention relates to a kind of Switching Power Supply LED switch power supply.
Background technology
At present, because LED has the characteristics that energy consumption is low, service life is long and safety and environmental protection, it has become people One of the main product of life lighting.People are realized to LED using acoustic control or light-operated control system more in life Open and close.Light-operated LED control system can control the unlatching of LED and pass because of it according to the brightness of LED use environment Close, and can effectively meet requirement of the people to LED in terms of energy-conservation, and enjoy the favor of people.It is however, existing light-operated There is the problem of output voltage and unstable electric current in LED power, cause the brightness of light-operated LED (liquid crystal diode) lamp unstable, had a strong impact on LED The service life of lamp.
Therefore it provides a kind of light-operated LED power supply that can export stable voltage and current is the task of top priority.
The content of the invention
It is an object of the invention to overcome, there is output voltage in light-operated LED power supply of the prior art and electric current is unstable Defect, there is provided a kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation.
The present invention is achieved through the following technical solutions：A kind of light-operated LED switch electricity based on short-circuit protective circuit of voltage regulation Source, mainly by control chip U2, transformer T, diode rectifier U1, the cathode output end phase of positive pole and diode rectifier U1 The polar capacitor C1 that connection, negative pole are connected with diode rectifier U1 cathode output end, positive pole and polar capacitor C1 are just Polar capacitor C2, the N pole that pole is connected, negative pole is connected after resistance R1 with polar capacitor C1 negative pole is with control chip U2's The voltage-regulator diode D1 that VIN pins are connected, P poles are connected with diode rectifier U1 cathode output end, with control chip The phase adjusting circuit that U2 is connected, the voltage conditioning output electricity being connected respectively with control chip U2 and diode rectifier U1 Road, and the short-circuit protective circuit of voltage regulation being connected respectively with phase adjusting circuit and voltage conditioning output circuit form；It is described The Same Name of Ends of transformer T secondary inductance coils is connected with diode rectifier U1 one of input, its non-same polarity It is connected with diode rectifier U1 another input；Control chip U2 GND pins ground connection；
The short-circuit protective circuit of voltage regulation is by voltage stabilizing chip U101, triode VT101, triode VT102, one end and three poles The resistance R101 that pipe VT101 emitter stage is connected, the other end is connected with voltage stabilizing chip U101 IN pins, positive pole and three poles Pipe VT101 colelctor electrode is connected, the polar capacitor C101 of negative pole ground connection, one end is connected with triode VT101 emitter stage, Resistance R102, the P pole that the other end is connected with triode VT102 colelctor electrode is connected with triode VT101 base stage, N poles The diode D101 being connected with triode VT102 base stage, positive pole is connected with triode VT102 base stage, negative pole is through electricity The polar capacitor C102 that is connected with voltage stabilizing chip U101 GND pins after resistance R104, positive pole is after adjustable resistance R103 with three The polar capacitor C103 that pole pipe VT102 emitter stage is connected, negative pole is connected with voltage stabilizing chip U101 OUT pins, and One end is connected with polar capacitor C103 negative pole, the resistance R105 compositions of other end ground connection；The transmitting of the triode VT101 Pole is connected with phase adjusting circuit, and triode VT101 colelctor electrode is connected with voltage stabilizing chip U101 IN pins；It is described Voltage stabilizing chip U101 GND pins ground connection, voltage stabilizing chip U101 OUT pins are connected with voltage conditioning output circuit.
The phase adjusting circuit is by triode VT1, triode VT2, SS of the positive pole after resistance R1 with control chip U2 Polar capacitor C3, the P pole that pin is connected, negative pole is connected with triode VT1 emitter stage and control chip U2 SIN pins It is connected, the diode D2 that N poles are connected with triode VT1 colelctor electrode, COC of the positive pole after resistance R4 with control chip U2 The polar capacitor C4 that pin is connected, negative pole is connected after resistance R3 with triode VT1 emitter stage, negative pole and control chip The polar capacitor C5 that U2 FC pins are connected, positive pole is connected after resistance R5 with triode VT2 colelctor electrode, and N poles It is connected after resistance R7 with control chip U2 CR pins, P poles are connected after resistance R6 with triode VT2 emitter stage Diode D3 is formed；The N poles of the diode D3 are connected with control chip U2 SHDN pins, its P pole and triode VT101 Emitter stage be connected；The base stage of the triode VT2 is connected with triode VT1 base stage, its emitter stage and polar capacitor C4 negative pole is grounded after being connected；The positive pole of the polar capacitor C4 is connected with triode VT1 base stage.
Voltage conditioning output circuit is by FET MOS, triode VT3, positive pole after resistance R8 with triode VT3 Emitter stage be connected, the polar capacitor C6 that negative pole is connected with diode rectifier U1 cathode output end, one end and field are imitated Should pipe MOS drain electrode be connected, the adjustable resistance R12 that the other end is connected with voltage stabilizing chip U101OUT pins, one end and polarity Inductance L2, the N pole that electric capacity C6 positive pole is connected, the other end is connected with voltage stabilizing chip U101 OUT pins is after resistance R10 It is connected with FET MOS source electrode, the diode D4 that P poles are connected with triode VT3 base stage, negative pole and triode The polar capacitor C7 that VT3 colelctor electrode is connected, positive pole is connected with FET MOS grid, and positive pole is sequentially through electricity It is connected after resistance R9 and inductance L1 with control chip U2 FB pins, adjustable end of the negative pole after resistance R11 with adjustable resistance R12 The polar capacitor C8 compositions being connected；The grid of the FET MOS is managed with control chip U2 VOUT pins and PWM respectively Pin is connected, it drains and the output end of voltage conditioning output circuit is collectively forming with voltage stabilizing chip U101 OUT pins.
For the practical effect of the present invention, the control chip U2 is then preferentially realized using L296 integrated chips； The voltage stabilizing chip U101 is 7805ABT integrated chips.
The present invention compared with prior art, has advantages below and beneficial effect：
(1) present invention can to input voltage and electric current pulse dynamic be adjusted, and the present invention can also to output electricity Pressure and the intensity of electric current are adjusted, and are ensured that the stability for the voltage and current that the present invention exports, effectively be ensure that The stability of light-operated LED (liquid crystal diode) lamp brightness, and improve the service life of LED.
(2) the short-circuit protective circuit of voltage regulation that the present invention is set can be in the instant high-voltage or electricity that the short circuit of this source element occurs Stream is suppressed；And voltage to passing through can be combined with its peripheral electronic component by the voltage stabilizing chip set by the circuit Quickly it is depressured, while timely blocks this power supply, so as to effectively ensure that the load of Switching Power Supply will not be damaged.
(3) control chip U of the invention is realized using L296 integrated chips, and the chip is combined with external circuit Effectively raise the stability and reliability of output voltage and electric current of the present invention.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the electrical block diagram of the short-circuit protective circuit of voltage regulation of the present invention.
Embodiment
The present invention is described in further detail with reference to embodiment and its accompanying drawing, but embodiments of the present invention are not It is limited to this.
Embodiment
As shown in figure 1, the present invention is mainly by control chip U2, transformer T, diode rectifier U1, polar capacitor C1, pole Property electric capacity C2, short-circuit protective circuit of voltage regulation, voltage-regulator diode D1, phase adjusting circuit, and voltage conditioning output circuit composition.
During connection, polar capacitor C1 positive pole is connected with diode rectifier U1 cathode output end, its negative pole and two Pole pipe rectifier U1 cathode output end is connected.Polar capacitor C2 positive pole is connected with polar capacitor C1 positive pole, negative pole Negative pole with polar capacitor C1 after resistance R1 is connected.Voltage-regulator diode D1 N poles are connected with control chip U2 VIN pins Connect, its P pole is connected with diode rectifier U1 cathode output end.Phase adjusting circuit is connected with control chip U2.Electricity Pressure conditioning output circuit is connected with control chip U2 and diode rectifier U1 respectively.Short-circuit protective circuit of voltage regulation respectively with arteries and veins Adjustment circuit is rushed with voltage conditioning output circuit to be connected.
The Same Name of Ends of the transformer T secondary inductance coils is connected with diode rectifier U1 one of input Connect, its non-same polarity is connected with diode rectifier U1 another input；Control chip U2 GND pins ground connection；Institute The Same Name of Ends and non-same polarity for stating transformer T primary side inductance coils are connected with external power source respectively.
Wherein, the phase adjusting circuit is by triode VT1, triode VT2, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, polar capacitor C3, polar capacitor C4, polar capacitor C5, diode D2, and diode D3 compositions.
During connection, polar capacitor C3 positive pole is connected after resistance R1 with control chip U2 SS pins, its negative pole with Triode VT1 emitter stage is connected.Diode D2 P poles are connected with control chip U2 SIN pins, its N pole and three poles Pipe VT1 colelctor electrode is connected.Polar capacitor C4 positive pole is connected after resistance R4 with control chip U2 COC pins, it Emitter stage of the negative pole with triode VT1 after resistance R3 is connected.Polar capacitor C5 negative pole and control chip U2 FC pins It is connected, colelctor electrode of its positive pole with triode VT2 after resistance R5 is connected.Diode D3 N poles after resistance R7 with control Coremaking piece U2 CR pins are connected, its emitter stage of P poles with triode VT2 after resistance R6 is connected.
The N poles of the diode D3 are connected with control chip U2 SHDN pins, its P pole and triode VT101 hair Emitter-base bandgap grading is connected；The base stage of the triode VT2 is connected with triode VT1 base stage, its emitter stage is with polar capacitor C4's Negative pole is grounded after being connected；The positive pole of the polar capacitor C4 is connected with triode VT1 base stage.
Further, the voltage conditioning output circuit is by FET MOS, triode VT3, resistance R8, resistance R9, electricity Hinder R10, resistance R11, adjustable resistance R12, polar capacitor C6, polar capacitor C7, polar capacitor C8, diode D4, and inductance L2 is formed.
During connection, polar capacitor C6 positive pole is connected after resistance R8 with triode VT3 emitter stage, its negative pole and two Pole pipe rectifier U1 cathode output end is connected.Adjustable resistance R12 one end is connected, separately with FET MOS drain electrode One end is connected with voltage stabilizing chip U101OUT pins.Inductance L2 one end is connected with polar capacitor C6 positive pole, its other end It is connected with voltage stabilizing chip U101 OUT pins.
Meanwhile diode D4 N poles are connected after resistance R10 with FET MOS source electrode, its P pole and triode VT3 base stage is connected.Polar capacitor C7 negative pole is connected with triode VT3 colelctor electrode, its positive pole and FET MOS Grid be connected.Polar capacitor C8 positive pole is sequentially connected after resistance R9 and inductance L1 with control chip U2 FB pins Connect, its negative pole is connected after resistance R11 with adjustable resistance R12 adjustable end.
The grid of the FET MOS is connected with control chip U2 VOUT pins and PWM pins respectively, its drain electrode The output end of voltage conditioning output circuit is collectively forming with voltage stabilizing chip U101 OUT pins and is connected with LED.
As shown in Fig. 2 the short-circuit protective circuit of voltage regulation is by voltage stabilizing chip U101, triode VT101, triode VT102, Resistance R101, resistance R102, adjustable resistance R103, resistance R104, resistance R105, polar capacitor C101, polar capacitor C102, pole Property electric capacity C103, and diode D101 composition.
During connection, resistance R101 one end is connected with triode VT101 emitter stage, the other end and voltage stabilizing chip U101 IN pins be connected.Polar capacitor C101 positive pole is connected with triode VT101 colelctor electrode, negative pole ground connection.Resistance R102 one end is connected with triode VT101 emitter stage, the other end is connected with triode VT102 colelctor electrode.Two poles Pipe D101 P poles are connected with triode VT101 base stage, N poles are connected with triode VT102 base stage.
Wherein, polar capacitor C102 positive pole be connected with triode VT102 base stage, negative pole after resistance R104 with it is steady Pressure chip U101 GND pins are connected.Hair of the polar capacitor C103 positive pole after adjustable resistance R103 with triode VT102 Emitter-base bandgap grading is connected, negative pole is connected with voltage stabilizing chip U101 OUT pins.Resistance R105 one end is negative with polar capacitor C103's Pole is connected, the other end is grounded.
The emitter stage of the triode VT101 is connected with phase adjusting circuit, triode VT101 colelctor electrode with it is steady Pressure chip U101 IN pins are connected；The GND pins ground connection of the voltage stabilizing chip U101, voltage stabilizing chip U101 OUT pipes Pin is connected with voltage conditioning output circuit.；The voltage stabilizing chip U101 is 7805ABT integrated chips.The circuit operationally, When short circuit occurs in this Switching Power Supply and voltage instantaneous raises, the current limiter that resistance R101 and polar capacitor C101 is formed then can be right Electric current quickly discharge over the ground, and triode VT101 is now in cut-off state, and electric current carries out voltage stabilizing through voltage stabilizing chip U101 Triode VT102 is flowed to by the polar capacitor C103 and adjustable resistance R103 feedback channels formed afterwards, makes triode VT102's Level rise on emitter stage, triode VT102 cut-offs, this Switching Power Supply stop output voltage, and its Switching Power Supply is in dead electricity State, it is therefore prevented that load is damaged by the voltage.
During operation, the pulse dynamic that the present invention can be to input voltage and electric current is adjusted, and the present invention can also be to defeated The intensity for going out voltage and current is adjusted, and the short-circuit protective circuit of voltage regulation that the present invention is set can be in the short circuit of this source element The instant high-voltage or electric current of appearance are suppressed；And the electronics member peripheral with it of the voltage stabilizing chip set by the circuit can be passed through Part is combined quickly to be depressured to the voltage passed through, while timely blocks this power supply, ensures that output of the present invention Voltage and current stability, effectively ensure that the stability of light-operated LED (liquid crystal diode) lamp brightness, and improve the use of LED Life-span.
Meanwhile control chip U of the invention realizes that the chip has overtemperature protection and short circuit using L296 integrated chips The functions such as protection, and the chip is combined with external circuit and effectively raises the stability of output voltage and electric current of the present invention And reliability.
According to above-described embodiment, you can realize the present invention well.

Claims (4)

  1. A kind of 1. light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation, it is characterised in that mainly by control chip U2, Transformer T, diode rectifier U1, positive pole is connected with diode rectifier U1 cathode output end, negative pole and diode are whole The polar capacitor C1 that stream device U1 cathode output end is connected, positive pole is connected with polar capacitor C1 positive pole, negative pole is through resistance Polar capacitor C2, the N pole being connected after R1 with polar capacitor C1 negative pole is connected with control chip U2 VIN pins, P poles with The voltage-regulator diode D1 that diode rectifier U1 cathode output end is connected, the pulse adjustment electricity being connected with control chip U2 Road, the voltage conditioning output circuit being connected respectively with control chip U2 and diode rectifier U1, and adjusted respectively with pulse The short-circuit protective circuit of voltage regulation composition that whole circuit is connected with voltage conditioning output circuit；The transformer T secondary inductance coils Same Name of Ends be connected with diode rectifier U1 one of input, its non-same polarity it is another with diode rectifier U1's One input is connected；Control chip U2 GND pins ground connection；
    The short-circuit protective circuit of voltage regulation is by voltage stabilizing chip U101, triode VT101, triode VT102, one end and triode The resistance R101 that VT101 emitter stage is connected, the other end is connected with voltage stabilizing chip U101 IN pins, positive pole and triode VT101 colelctor electrode is connected, the polar capacitor C101 of negative pole ground connection, and one end is connected, separately with triode VT101 emitter stage Resistance R102, the P pole that one end is connected with triode VT102 colelctor electrode is connected with triode VT101 base stage, N poles with The diode D101 that triode VT102 base stage is connected, positive pole is connected with triode VT102 base stage, negative pole is through resistance The polar capacitor C102 being connected after R104 with voltage stabilizing chip U101 GND pins, positive pole after adjustable resistance R103 with three poles The polar capacitor C103, Yi Jiyi that pipe VT102 emitter stage is connected, negative pole is connected with voltage stabilizing chip U101 OUT pins End is connected with polar capacitor C103 negative pole, the resistance R105 compositions of other end ground connection；The emitter stage of the triode VT101 It is connected with phase adjusting circuit, triode VT101 colelctor electrode is connected with voltage stabilizing chip U101 IN pins；It is described steady Chip U101 GND pins ground connection is pressed, voltage stabilizing chip U101 OUT pins are connected with voltage conditioning output circuit.
  2. 2. a kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation according to claim 1, its feature exist In the phase adjusting circuit is by triode VT1, triode VT2, SS pin phase of the positive pole after resistance R1 with control chip U2 Polar capacitor C3, the P pole that connection, negative pole are connected with triode VT1 emitter stage is connected with control chip U2 SIN pins Connect, the diode D2 that N poles are connected with triode VT1 colelctor electrode, COC pin of the positive pole after resistance R4 with control chip U2 It is connected, the polar capacitor C4 that negative pole is connected after resistance R3 with triode VT1 emitter stage, negative pole is with control chip U2's The polar capacitor C5 that FC pins are connected, positive pole is connected after resistance R5 with triode VT2 colelctor electrode, and N poles are through electricity It is connected after resistance R7 with control chip U2 CR pins, two poles that P poles are connected after resistance R6 with triode VT2 emitter stage Pipe D3 is formed；The N poles of the diode D3 are connected with control chip U2 SHDN pins, its P pole and triode VT101 hair Emitter-base bandgap grading is connected；The base stage of the triode VT2 is connected with triode VT1 base stage, its emitter stage is with polar capacitor C4's Negative pole is grounded after being connected；The positive pole of the polar capacitor C4 is connected with triode VT1 base stage.
  3. 3. a kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation according to claim 2, its feature exist In the voltage nurses one's health output circuit by FET MOS, triode VT3, hair of the positive pole after resistance R8 with triode VT3 The polar capacitor C6 that emitter-base bandgap grading is connected, negative pole is connected with diode rectifier U1 cathode output end, one end and FET MOS drain electrode is connected, the adjustable resistance R12 that the other end is connected with voltage stabilizing chip U101OUT pins, one end and polar capacitor Inductance L2, the N pole that C6 positive pole is connected, the other end is connected with voltage stabilizing chip U101 OUT pins after resistance R10 with field The diode D4 that effect pipe MOS source electrode is connected, P poles are connected with triode VT3 base stage, negative pole is with triode VT3's The polar capacitor C7 that colelctor electrode is connected, positive pole is connected with FET MOS grid, and positive pole sequentially through resistance R9 and It is connected after inductance L1 with control chip U2 FB pins, negative pole is connected after resistance R11 with adjustable resistance R12 adjustable end Polar capacitor C8 composition；The grid of the FET MOS is connected with control chip U2 VOUT pins and PWM pins respectively Connect, it drains and the output end of voltage conditioning output circuit is collectively forming with voltage stabilizing chip U101 OUT pins.
  4. 4. a kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation according to claim 3, its feature exist In the control chip U2 is L296 integrated chips；The voltage stabilizing chip U101 is 7805ABT integrated chips.
CN201711050195.0A 2017-10-31 2017-10-31 A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation Pending CN107734757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711050195.0A CN107734757A (en) 2017-10-31 2017-10-31 A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711050195.0A CN107734757A (en) 2017-10-31 2017-10-31 A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation

Publications (1)

Publication Number Publication Date
CN107734757A true CN107734757A (en) 2018-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711050195.0A Pending CN107734757A (en) 2017-10-31 2017-10-31 A kind of light-operated LED Switching Power Supply based on short-circuit protective circuit of voltage regulation

Country Status (1)

Country Link
CN (1) CN107734757A (en)

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