Constant-voltage driving power supply for white-light LEDs
A technology of driving power supply and white light, which is applied in the electronic field, can solve the problem of low stability and achieve the effect of simple LED power supply
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[0015] Such as figure 1 As shown, the constant voltage driving power supply for white light LED of the present invention is mainly composed of a diode rectifier U, a transformer T, a control chip U1, an amplifier P1, a resistor R4, a resistor R3, a resistor R5, a Zener diode D4, an input anti-interference circuit, and a gate Pole drive circuit and constant voltage output circuit.
[0016] When connected, the input anti-interference circuit is connected in series between the positive output terminal of the diode rectifier U and the primary inductance coil L1 of the transformer T. The resistor R3 is connected in series between the negative output terminal of the diode rectifier U and the VCC pin of the control chip U1. The gate drive circuit is connected in series between the primary inductance coil L2 of the transformer T and the control chip U1. The N pole of the Zener diode D2 is connected to the negative pole of the amplifier P1 through the resistor R4, and its P is ground...
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