CN212970190U - 20-50W ultrathin constant-voltage PWM dimming interface power supply - Google Patents

20-50W ultrathin constant-voltage PWM dimming interface power supply Download PDF

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Publication number
CN212970190U
CN212970190U CN202021451804.0U CN202021451804U CN212970190U CN 212970190 U CN212970190 U CN 212970190U CN 202021451804 U CN202021451804 U CN 202021451804U CN 212970190 U CN212970190 U CN 212970190U
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resistor
capacitor
diode
pin
terminal
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张立波
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Foshan Oubo Intelligent Electronic Technology Co.,Ltd.
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Foshan Oubo Electronic Co ltd
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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 utility model discloses a 20-50W ultra-thin constant voltage area PWM interface power of adjusting luminance, include by interface P1, fuse F1, common mode inductance LF1, piezo-resistor ZNR1, resistance R1, resistance R2, electric capacity CX1, common mode inductance LF2, paster rectifier bridge DB1, electric capacity CB2, resistance R3, inductance L1, resistance R4, resistance R5, integrated chip IC1, diode D1, resistance R18, the voltage conversion output circuit that components such as field effect transistor Q1 constitute, and by resistance R29, resistance R30, triode Q3, resistance R32, resistance R33, resistance R31, zener diode ZD2, field effect transistor Q2, the dimming signal access circuit that components such as triode Q4 constitute, be connected with PWM pulse width modulation current signal DIM, can adjust luminance drive control 20-50W LED lamps and lanterns, and power output voltage is the constant voltage is ZD 12V.

Description

20-50W ultrathin constant-voltage PWM dimming interface power supply
Technical Field
The utility model belongs to the technical field of the illumination lamps and lanterns, concretely relates to lamps and lanterns drive power supply.
Background
When the LED illuminating lamp is in use, a corresponding driving power supply is needed to provide working voltage and current for the illuminating power supply, and the light color and the brightness of an illuminating light source, namely an LED lamp bead, can be regulated and changed by controlling the output current during working, so that the requirements of the light color and the brightness of the illuminating lamp are met. Therefore, in the production and manufacture of actual lighting fixtures, a matched driving power supply is required to be designed for the corresponding fixture matching.
Disclosure of Invention
The utility model aims at providing a can be connected with PWM pulse width modulation current signal DIM be applicable to the ultra-thin constant voltage area PWM interface power that adjusts luminance that 20-50W LED illumination lamps and lanterns used of adjusting luminance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A20-50W ultrathin constant-voltage band PWM dimming interface power supply comprises a plug interface P, a fuse F, a common-mode inductor LF, a piezoresistor ZNR, a resistor R, a capacitor CX, a common-mode inductor LF, a patch rectifier bridge DB, a capacitor CB, a resistor R, an inductor L, a resistor R, an integrated chip IC, a diode D, a resistor R, a field effect tube Q, a capacitor C, a diode D, a resistor R, a capacitor C, a transformer T, a resistor R, a capacitor C, a resistor R, a capacitor C, an electrolytic capacitor EC, a resistor R, a diode D, a capacitor C, a resistor R, a resistor RS, a capacitor C, an optocoupler IC, a resistor R, a voltage stabilizing diode ZD, a resistor R, a capacitor C, a resistor R, a linear regulator IC, A resistor R26, a capacitor C10, a diode D4, an electrolytic capacitor EC2, an electrolytic capacitor EC3, a resistor R28, a common mode inductor LF3, a capacitor C11, a capacitor CY1, a resistor R29, a resistor R30, a triode Q3, a resistor R32, a resistor R33, a resistor R31, a zener diode ZD2, a field effect transistor Q2, a triode Q4, a resistor R34, a resistor R35, a zener diode ZD3 and a capacitor C12, wherein the fuse F1 is connected between a pin 2 of a plug port P1 and a pin 2 of the common mode inductor LF1, a pin 1 of the plug port P1 is connected with a pin 3 of the common mode inductor LF1, two ends of the common mode resistor ZNR1 are respectively connected with the pin 1 and the pin 4 of the common mode inductor LF1, the resistor R1 and the resistor R1 are connected in parallel with the varistor 1 after being connected in series, one end of the varistor ZNR1 and the other end of the common mode inductor CX1 is connected with the pin 2 of the common mode inductor LF1, pin 4 and pin 1 of the common mode inductor LF2 are respectively connected to an AC terminal of the patch rectifier bridge DB1, a V + terminal of the patch rectifier bridge DB1 is connected to one terminals of the resistor R3 and the inductor L1, a V-terminal of the patch rectifier bridge DB1 is connected to one terminal of the capacitor CB2 and grounded, the other terminal of the capacitor CB2 is connected to the other terminals of the resistor R3 and the inductor L1 and is respectively connected to one terminals of the resistor R4, the resistor R10, the resistor R11 and the capacitor C11, the other terminal of the resistor R11 is connected to one terminal of the resistor R11, the other terminal of the resistor R11 is connected to an HV terminal of the integrated chip IC 11, the other terminals of the resistor R11, the resistor R11 and the capacitor C11 are connected to one terminal of the resistor R11, the other terminal of the resistor R11 is connected to a negative terminal of the diode D11, and a positive pole of the transformer D11 is connected to one terminal N of the N11, One end of the capacitor C2 and the drain of the fet Q1, the source of the fet Q1 is connected to the other end of the capacitor C2, one end of the resistor R15, one end of the resistor R16, the resistor RS1, the resistor RS2, and one end of the resistor RS3, the other end of the resistor R15 is connected to the gate of the fet Q1, one end of the resistor R18, and the anode of the diode D1, the cathode of the diode D1, and the other end of the resistor R18 are connected to the OUT pin of the IC 1;
a ZCD pin of the integrated chip IC1 is connected to one end of the resistor R6, the resistor R7 and the capacitor C5, the other end of the resistor R6 is connected to one end of a coil N3 of the transformer T1 and an anode of the diode D3, a cathode of the diode D3 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to a VCC pin of the integrated chip IC1, one end of the capacitor C4 and an anode of the electrolytic capacitor EC 4, a COMP pin of the integrated chip IC 4 is connected to one end of the resistor R4, one end of the capacitor C4 and a receiving end C of the optical coupler IC 4, the other end of the resistor R4 is connected to one end of the capacitor C4 and a CS pin of the integrated chip IC 4, the other end of the resistor R4 is connected to one end of the capacitor C4, the resistor R4, the capacitor C4, the resistor R4, the capacitor RS 4, the, The resistor RS2, the resistor RS3, the other end of the capacitor C6, the GND pin of the integrated chip IC1 and the negative electrode of the electrolytic capacitor EC1 are connected with the E pole of the receiving end of the optical coupler IC2 and grounded;
the anode of the emitting end of the optical coupler IC2 is connected with one end of the resistor R23 and one end of the resistor R25, the cathode of the emitting end of the optical coupler IC2 is connected with the other end of the resistor R25, one end of the resistor R24 and a pin C of the linear regulator IC3, the other end of the resistor R23 is connected with the anode of the zener diode ZD1, the cathode of the zener diode ZD1 is connected with one end of the resistor R20, one end of the resistor R28, the anode of the electrolytic capacitor EC2, the anode of the electrolytic capacitor EC3, one end of the capacitor C10 and the cathode of the diode D4, the other end of the resistor R20 is connected with one end of the capacitor C9, a pin R of the linear regulator IC3, one end of the resistor R21 and one end of the resistor R22, the other end of the capacitor C9 is connected with the other end of the resistor R24, the other end of the resistor R21 and the other end of the resistor R22 are connected with a pin A of the linear regulator IC3 and grounded, the other end of a coil N1 of the transformer T1 is connected to the inductor L1 and is grounded through the capacitor CY1, the other end of a coil N3 of the transformer T1 and an iron core are grounded, the other end of the capacitor C10 is connected to one end of the resistor R26, the other end of the resistor R26 is connected to the anode of the diode D4 and one end of a coil N2 of the transformer T1, the other end of a coil N2 of the transformer T1 is connected to the cathode of the electrolytic capacitor EC3, the cathode of the electrolytic capacitor EC2 and the other end of the resistor R28 and is grounded, the capacitor C11 is connected in parallel with the resistor R28 through the common-mode inductor LF3, one end of the capacitor C11 is grounded, and the other end of the capacitor C11 outputs a voltage of + 12V;
one end of the resistor R29 is connected to the +12V voltage output end of the capacitor C11, the other end of the resistor R29 is connected to one end of the resistor R30, the other end of the resistor R30 is connected to the collector of the transistor Q3, one end of the resistor R31, the cathode of the zener diode ZD2, the collector of the transistor Q4 and the gate of the fet Q2, the base of the transistor Q3 is connected to the resistor R32 and one end of the resistor R33, the other end of the resistor R32 is connected to the PWM pulse width modulation current signal DIM, the drain of the fet Q2 is connected to the cathode of the zener diode ZD3 and the LED light source, the anode of the zener diode 3 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to one end of the resistor R35, the base of the transistor Q4 and one end of the capacitor C12, and the other end of the resistor R33 is connected to the ZD 33, The emitter of the triode Q3, the other end of the resistor R31, the anode of the zener diode ZD2, the source of the field effect transistor Q2, the emitter of the triode Q4, the other end of the resistor R35, and the other end of the capacitor C12 are connected and grounded. A
Further, the fuse F1 is a square fuse with a rated current of 16A and a rated voltage of 250V; the patch rectifier bridge DB1 is an ABS10 rectifier bridge; the optical coupler IC2 is an EL817B linear optical coupler; the linear voltage regulator IC3 is a patch three-terminal voltage regulator tube packaged by TL431SOT 23-3; the diode D4 is formed by connecting two diodes in parallel and is packaged by a TO-252 paster, and the rated current of the diode D4 is 10A, and the rated voltage of the diode D4 is 100V.
The utility model discloses following beneficial effect has:
the utility model relates to an ultra-thin constant voltage of 20-50W area PWM interface power of adjusting luminance, it can be connected with PWM pulse width modulation current signal DIM for adjust luminance drive control to 20-50W LED illumination lamps and lanterns, and power output voltage is invariably 12V.
Drawings
Fig. 1 is a voltage conversion output circuit diagram of a 20-50W ultra-thin constant voltage PWM dimming interface power supply of the present invention;
fig. 2 is a circuit diagram of the PWM pulse width modulation current signal access circuit of the 20-50W ultra-thin constant voltage PWM dimming interface power supply of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments so as to more clearly understand the technical idea claimed in the invention.
As shown in fig. 1-2, the present invention relates to a 20-50W ultra-thin constant voltage belt PWM dimming interface power supply, which includes a socket P1, a fuse F1, a common mode inductor LF1, a voltage dependent resistor ZNR1, a resistor R1, a capacitor CX1, a common mode inductor LF1, a chip rectifier DB1, a capacitor CB 1, a resistor R1, an inductor L1, a resistor R1, an integrated chip IC1, a diode D1, a resistor R1, a field effect transistor Q1, a capacitor C1, a diode D1, a resistor R1, a capacitor C1, a resistor R1, a capacitor C1, a resistor R1, a, A linear voltage regulator IC3, a resistor R21, a resistor R22, a resistor R26, a capacitor C10, a diode D4, an electrolytic capacitor EC2, an electrolytic capacitor EC3, a resistor R28, a common mode inductor LF3, a capacitor C11, a capacitor CY1, a resistor R29, a resistor R30, a transistor Q3, a resistor R32, a resistor R33, a resistor R31, a zener diode ZD2, a field effect transistor Q2, a transistor Q4, a resistor R34, a resistor R35, a zener diode Q3, and a capacitor C12, wherein the fuse F1 is connected between a pin 2 of a socket P1 and a pin 2 of the common mode inductor 1, the fuse F1 is a square fuse with a rated current of 16A and a rated voltage of 250V, the pin 1 of the socket P1 is connected with a pin 3 of the common mode inductor LF1, two ends of the varistor R1 are respectively connected with the common mode inductor ZNR1, the pin ZNR1 and the resistor ZD1 in series connection with the resistor R1, the capacitor CX1 is connected in parallel to the varistor ZNR1 and one end of the same is connected with the pin 2 and the other end of the common mode inductor LF2 and is connected with the pin 3 of the common mode inductor LF2, the pin 4 and the pin 1 of the common mode inductor LF2 are respectively connected with the AC end of the patch rectifier bridge DB1, the V + end of the patch rectifier bridge DB1 is connected with the resistor R3 and one end of the inductor L1, the V-end of the patch rectifier bridge DB1 is connected with one end of the capacitor CB2 and is grounded, the patch rectifier bridge DB1 is an ABS10 rectifier bridge, the other end of the capacitor CB2 is connected with the other end of the resistor R3 and the inductor L1 and is respectively connected with the resistor R4, the resistor R10, the resistor R11, the resistor R12 and one end of the capacitor C1, the other end of the resistor R4 is connected with one end of the resistor R5, and the other end of the resistor R5 is connected with the pin of the HV 1 of, the other ends of the resistor R10, the resistor R11, the resistor R12 and the capacitor C1 are connected to one end of the resistor R14, the other end of the resistor R14 is connected to the cathode of the diode D2, the anode of the diode D2 is connected to one end of the coil N1 of the transformer T1, one end of the capacitor C2 and the drain of the fet Q1, the source of the fet Q1 is connected to the other end of the capacitor C2, one end of the resistor R15, one end of the resistor R16, the resistor RS1, the resistor RS2 and one end of the resistor RS3, the other end of the resistor R15 is connected to the gate of the fet Q1, one end of the resistor R18 and the anode of the diode D1, and the cathode of the diode D1 and the other end of the resistor R18 are connected to the OUT pin of the IC 1;
a ZCD pin of the integrated chip IC1 is connected to one end of the resistor R6, the resistor R7 and the capacitor C5, the other end of the resistor R6 is connected to one end of a coil N3 of the transformer T1 and an anode of the diode D3, a cathode of the diode D3 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to a VCC pin of the integrated chip IC1, one end of the capacitor C4 and an anode of the electrolytic capacitor EC 4, a COMP pin of the integrated chip IC 4 is connected to one end of the resistor R4, one end of the capacitor C4 and a receiving end C of the optical coupler IC 4, the other end of the resistor R4 is connected to one end of the capacitor C4 and a CS pin of the integrated chip IC 4, the other end of the resistor R4 is connected to one end of the capacitor C4, the resistor R4, the capacitor C4, the resistor R4, the capacitor RS 4, the, The resistor RS2, the resistor RS3, the other end of the capacitor C6, a GND pin of the integrated chip IC1 and a negative electrode of the electrolytic capacitor EC1 are connected with a receiving end E pole of the optocoupler IC2 and grounded, and the optocoupler IC2 is an EL817B linear optocoupler;
the anode of the emitting end of the optical coupler IC2 is connected with one end of the resistor R23 and one end of the resistor R25, the cathode of the emitting end of the optical coupler IC2 is connected with the other end of the resistor R25, one end of the resistor R24 and a pin C of the linear regulator IC3, the other end of the resistor R23 is connected with the anode of the zener diode ZD1, the cathode of the zener diode ZD1 is connected with one end of the resistor R20, one end of the resistor R28, the anode of the electrolytic capacitor EC2, the anode of the electrolytic capacitor EC3, one end of the capacitor C10 and the cathode of the diode D4, the other end of the resistor R20 is connected with one end of the capacitor C9, a pin R of the linear regulator IC3, one end of the resistor R21 and one end of the resistor R22, the other end of the capacitor C9 is connected with the other end of the resistor R24, the other end of the resistor R21 and the other end of the resistor R22 are connected with a pin A of the linear regulator IC3 and grounded, the linear voltage regulator IC3 is a TL431SOT23-3 packaged patch three-terminal regulator tube, the other end of the coil N1 of the transformer T1 is connected TO the inductor L1 and is grounded through the capacitor CY1, the other end of the coil N3 of the transformer T1 and the iron core are grounded, the other end of the capacitor C10 is connected TO one end of the resistor R26, the other end of the resistor R26 is connected TO the anode of the diode D4 and one end of the coil N2 of the transformer T1, the diode D4 is specifically packaged by two diodes in parallel and adopting a TO-252 patch, the rated current of the diode is 10A and the rated voltage of the diode is 100V, the other end of the coil N2 of the transformer T1 is connected TO the cathode of the electrolytic capacitor EC3, the cathode of the electrolytic capacitor EC2 and the other end of the resistor R28 and is grounded, the capacitor C11 is connected TO the resistor R28 through the inductor LF3 in parallel, and one end of the capacitor C11 is grounded, The other end outputs +12V voltage;
one end of the resistor R29 is connected to the +12V voltage output end of the capacitor C11, the other end of the resistor R29 is connected to one end of the resistor R30, the other end of the resistor R30 is connected to the collector of the transistor Q3, one end of the resistor R31, the cathode of the zener diode ZD2, the collector of the transistor Q4 and the gate of the fet Q2, the base of the transistor Q3 is connected to the resistor R32 and one end of the resistor R33, the other end of the resistor R32 is connected to the PWM pulse width modulation current signal DIM, the drain of the fet Q2 is connected to the cathode of the zener diode ZD3 and the LED light source, the anode of the zener diode 3 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to one end of the resistor R35, the base of the transistor Q4 and one end of the capacitor C12, and the other end of the resistor R33 is connected to the ZD 33, The emitter of the triode Q3, the other end of the resistor R31, the anode of the zener diode ZD2, the source of the field effect transistor Q2, the emitter of the triode Q4, the other end of the resistor R35, and the other end of the capacitor C12 are connected and grounded.
The utility model discloses 20-50W ultra-thin constant voltage area PWM interface power of adjusting luminance inserts PWM pulse width modulation current signal DIM through its resistance R32, can be used to adjust luminance drive control to 20-50W LED illumination lamps and lanterns, and power output voltage is invariable 12V.
Various other changes and modifications may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such changes and modifications should fall within the scope of the present invention.

Claims (6)

1. The utility model provides a 20-50W ultra-thin constant voltage area PWM interface power of adjusting luminance which characterized in that: the device comprises a plug interface P, a fuse F, a common-mode inductor LF, a piezoresistor ZNR, a resistor R, a capacitor CX, a common-mode inductor LF, a patch rectifier bridge DB, a capacitor CB, a resistor R, an inductor L, a resistor R, an integrated chip IC, a diode D, a resistor R, a field effect tube Q, a capacitor C, a diode D, a resistor R, a capacitor C, a transformer T, a resistor R, a capacitor C, an electrolytic capacitor EC, a resistor R, a diode D, a capacitor C, a resistor R, a resistor RS, a capacitor C, an optocoupler IC, a resistor R, a voltage stabilizing diode ZD, a resistor R, a capacitor C, a resistor R, a linear voltage stabilizer IC, a resistor R, a capacitor C, a diode D, an electrolytic capacitor EC, A resistor R28, a common mode inductor LF 28, a capacitor C28, a capacitor CY 28, a resistor R28, a triode Q28, a resistor R28, a field effect transistor Q28, a triode Q28, a resistor R28, a zener diode ZD 28 and a capacitor C28, wherein the fuse F28 is connected between a pin 2 of a socket P28 and a pin 2 of the common mode inductor LF 28, a pin 1 of the socket P28 is connected with a pin 3 of the common mode inductor LF 28, two ends of the varistor ZNR 28 are respectively connected with a pin 1 and a pin 4 of the common mode inductor 28, the resistor R28 and the resistor R28 are connected in series and then connected in parallel with the varistor ZNR 28, the capacitor CX 28 is connected in parallel with the varistor ZNR 28, one end of the common mode inductor ZNR 28 is connected with a pin 2 of the common mode inductor 28, the other end of the common mode inductor DB and the common mode inductor DB LF 28 is connected with an AC LF pin 72, a V + terminal of the chip rectifier bridge DB1 is connected to one terminals of the resistor R3 and the inductor L1, a V-terminal of the chip rectifier bridge DB1 is connected to one terminal of the capacitor CB2 and grounded, the other terminal of the capacitor CB2 is connected to the other terminals of the resistor R3 and the inductor L1 and respectively connected to one terminals of the resistor R4, the resistor R10, the resistor R11, the resistor R12 and the capacitor C1, the other terminal of the resistor R1 is connected to one terminal of the resistor R1, the other terminal of the resistor R1 is connected to an HV pin of the integrated chip IC1, the other terminals of the resistor R1, the resistor R1 and the capacitor C1 are connected to one terminal of the resistor R1, the other terminal of the resistor R1 is connected to a cathode of the diode D1, an anode of the diode D1 is connected to one terminal of the coil N1 of the transformer T1, one terminal of the capacitor C1 and one terminal of the fet 36q 1, a source of the field effect transistor Q1 is connected to the other end of the capacitor C2, one end of the resistor R15, one end of the resistor R16, the resistor RS1, the resistor RS2, and one end of the resistor RS3, the other end of the resistor R15 is connected to a gate of the field effect transistor Q1, one end of the resistor R18, and an anode of the diode D1, and a cathode of the diode D1 and the other end of the resistor R18 are connected to an OUT pin of the integrated chip IC 1;
a ZCD pin of the integrated chip IC1 is connected to one end of the resistor R6, the resistor R7 and the capacitor C5, the other end of the resistor R6 is connected to one end of a coil N3 of the transformer T1 and an anode of the diode D3, a cathode of the diode D3 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to a VCC pin of the integrated chip IC1, one end of the capacitor C4 and an anode of the electrolytic capacitor EC 4, a COMP pin of the integrated chip IC 4 is connected to one end of the resistor R4, one end of the capacitor C4 and a receiving end C of the optical coupler IC 4, the other end of the resistor R4 is connected to one end of the capacitor C4 and a CS pin of the integrated chip IC 4, the other end of the resistor R4 is connected to one end of the capacitor C4, the resistor R4, the capacitor C4, the resistor R4, the capacitor RS 4, the, The resistor RS2, the resistor RS3, the other end of the capacitor C6, the GND pin of the integrated chip IC1 and the negative electrode of the electrolytic capacitor EC1 are connected with the E pole of the receiving end of the optical coupler IC2 and grounded;
the anode of the emitting end of the optical coupler IC2 is connected with one end of the resistor R23 and one end of the resistor R25, the cathode of the emitting end of the optical coupler IC2 is connected with the other end of the resistor R25, one end of the resistor R24 and a pin C of the linear regulator IC3, the other end of the resistor R23 is connected with the anode of the zener diode ZD1, the cathode of the zener diode ZD1 is connected with one end of the resistor R20, one end of the resistor R28, the anode of the electrolytic capacitor EC2, the anode of the electrolytic capacitor EC3, one end of the capacitor C10 and the cathode of the diode D4, the other end of the resistor R20 is connected with one end of the capacitor C9, a pin R of the linear regulator IC3, one end of the resistor R21 and one end of the resistor R22, the other end of the capacitor C9 is connected with the other end of the resistor R24, the other end of the resistor R21 and the other end of the resistor R22 are connected with a pin A of the linear regulator IC3 and grounded, the other end of a coil N1 of the transformer T1 is connected to the inductor L1 and is grounded through the capacitor CY1, the other end of a coil N3 of the transformer T1 and an iron core are grounded, the other end of the capacitor C10 is connected to one end of the resistor R26, the other end of the resistor R26 is connected to the anode of the diode D4 and one end of a coil N2 of the transformer T1, the other end of a coil N2 of the transformer T1 is connected to the cathode of the electrolytic capacitor EC3, the cathode of the electrolytic capacitor EC2 and the other end of the resistor R28 and is grounded, the capacitor C11 is connected in parallel with the resistor R28 through the common-mode inductor LF3, one end of the capacitor C11 is grounded, and the other end of the capacitor C11 outputs a voltage of + 12V;
one end of the resistor R29 is connected to the +12V voltage output end of the capacitor C11, the other end of the resistor R29 is connected to one end of the resistor R30, the other end of the resistor R30 is connected to the collector of the transistor Q3, one end of the resistor R31, the cathode of the zener diode ZD2, the collector of the transistor Q4 and the gate of the fet Q2, the base of the transistor Q3 is connected to the resistor R32 and one end of the resistor R33, the other end of the resistor R32 is connected to the PWM pulse width modulation current signal DIM, the drain of the fet Q2 is connected to the cathode of the zener diode ZD3 and the LED light source, the anode of the zener diode 3 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to one end of the resistor R35, the base of the transistor Q4 and one end of the capacitor C12, and the other end of the resistor R33 is connected to the ZD 33, The emitter of the triode Q3, the other end of the resistor R31, the anode of the zener diode ZD2, the source of the field effect transistor Q2, the emitter of the triode Q4, the other end of the resistor R35, and the other end of the capacitor C12 are connected and grounded.
2. The 20-50W ultra-thin constant voltage band PWM dimming interface power supply of claim 1, wherein: the fuse F1 is a square fuse with the rated current of 16A and the rated voltage of 250V.
3. The 20-50W ultra-thin constant voltage band PWM dimming interface power supply of claim 1, wherein: the patch rectifier bridge DB1 is an ABS10 rectifier bridge.
4. The 20-50W ultra-thin constant voltage band PWM dimming interface power supply of claim 1, wherein: the optical coupler IC2 is an EL817B linear optical coupler.
5. The 20-50W ultra-thin constant voltage band PWM dimming interface power supply of claim 1, wherein: the linear voltage regulator IC3 is a patch three-terminal voltage regulator tube packaged by TL431SOT 23-3.
6. The 20-50W ultra-thin constant voltage band PWM dimming interface power supply of claim 1, wherein: the diode D4 is formed by connecting two diodes in parallel and is packaged by a TO-252 paster, and the rated current of the diode D4 is 10A, and the rated voltage of the diode D4 is 100V.
CN202021451804.0U 2020-07-22 2020-07-22 20-50W ultrathin constant-voltage PWM dimming interface power supply Active CN212970190U (en)

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CN202021451804.0U CN212970190U (en) 2020-07-22 2020-07-22 20-50W ultrathin constant-voltage PWM dimming interface power supply

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