Power supply circuit used for LED
A technology of power supply circuit and circuit, which is applied in the direction of electric light source, electroluminescent light source, light source, etc., can solve the problems of working current fluctuation and LED working current instability, and achieve the effects of prolonging life, ensuring lighting quality and improving service life
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[0015] Such as figure 1 As shown, the power supply circuit for the LED of the present invention is mainly composed of a driving chip U1, a resistor R1, a resistor R2, a capacitor C4, a diode D1, a diode D2, a power input circuit and a power output circuit. Specifically, the power input circuit is respectively connected to the VCC pin and the DIM pin of the driving chip U1. One end of the resistor R1 is connected to the power input circuit, and the other end is connected to the TRIAC pin of the driving chip U1. The P pole of the diode D1 is connected to the HCD pin of the driving chip U1 through the resistor R2, and the N pole is connected to the VCC pin of the driving chip U1. The power output circuit is respectively connected to the FB pin and the GATE pin of the driving chip U1. The P pole of the diode D3 is connected to the HCD pin of the driving chip U1, and the N pole is connected to the power output circuit. The positive electrode of the capacitor C4 is connected to th...
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