Energy-saving power circuit for diode withstand voltage-type cold-light LED

Abstract

The invention discloses an energy-saving power circuit for a diode withstand voltage-type cold-light LED. The energy-saving power circuit is characterized by mainly comprising a control chip U2, a triode VT2, a diode withstand voltage circuit, a current adjusting circuit, a polar capacitor C5, a diode D3, a rectifier and filter circuit and a voltage-stabilizing drive circuit, wherein a negative electrode of the polar capacitor C5 is connected with a base of the triode VT2 and a positive electrode sequentially passes through a resistor R6 and a resistor R5 and then is connected with a COMP pin of the control chip U2; an N pole of the diode D3 is connected with an RC pin of the control chip U2 and a P pole sequentially passes through a resistor R7 and a resistor R8 and then is connected with a VREF pin of the control chip U2; the rectifier and filter circuit is connected with a VCC pin of the control chip U2; and the voltage-stabilizing drive circuit is connected with a collector and an emitter of the triode VT2 separately. The energy-saving power circuit has relatively high withstand voltage capability; stable current can be output; and the stability of the brightness of a blue-light LED lamp is effectively ensured; and compared with an existing power circuit, the energy-saving power circuit has the advantage that the energy consumption is reduced by over 55%.

Description

technical field [0001] The invention relates to the field of electronic energy saving, in particular to an energy-saving power supply circuit for diode voltage-resistant cold light LEDs. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. Since LED lamps are different from traditional incandescent lamps, they need to be driven by a dedicated power supply circuit. However, the current power supply circuit used in LED lamps is not only vulnerable to external voltage fluctuations, but also has poor voltage resistance, high energy consumption, and unstable output current, which leads to unstable brightness of LED lamps, power consumption, and use. Short life. [0003] Therefore, it is urgent to provide an LED power supply circuit that can not only improve the withstand voltage capability, but also...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of poor withstand voltage capability, high energy consumption and unstable output current in the LED voltage circuit in the prior art, and provide an energy-saving power supply circuit for diode withstand voltage cold light LEDs

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