A led power supply

Abstract

The invention belongs to a power supply circuit, more particularly relates to an LED power supply. The LED power supply comprises a transformer W, a resistor R1, a capacitor C2 and a relay J, wherein one end of a winding N1 of the transformer W is connected with a 220V mains voltage, the other end of the winding N1 of the transformer W is connected with the other end of the 220V mains voltage, and one end of a winding N2 of the transformer W is connected with the resistor R1, a cathode of a diode D6, an anode of a diode D7, the capacitor C2 and a capacitor C3. The LED power supply adopts a method of connecting rectifying diodes with capacitors in parallel to rectify the alternating current, can effectively prevent modulation on the diodes caused by a power grid high-frequency signal and a power frequency signal, reduces interference, can supply electric energy of LED through a storage battery after power outage of the mains supply, and has the advantages of stable performance, simple structure and diverse functions.

Description

technical field [0001] The invention belongs to a power supply circuit, in particular to an LED power supply. Background technique [0002] LED is recognized as the fourth-generation green light source. It is a solid cold light source with many advantages such as high efficiency, long life, safety and environmental protection, small size, high reliability, and fast response. At present, to achieve the same lighting effect, the power consumption of LED is about 1 / 10 of incandescent lamp and 1 / 2 of fluorescent lamp. LED power circuit is very important for LED. At present, most LED lamps still use ordinary power supply. In the event of a power outage, the power supply cannot be normal, and the existing power supply mostly uses diodes for rectification, and the high-frequency signal of the power grid and the power frequency signal are modulated on the diode, thus affecting the circuit. Contents of the invention [0003] The purpose of the present invention is to solve the pro...

AI Technical Summary

Problems solved by technology

At present, to achieve the same lighting effect, the power consumption of LED is about 1 / 10 of incandescent lamp and 1 / 2 of fluorescent lamp. LED power circuit is very important for LED. At present, most LED lamps still use ordinary power supply. In the event of a power outage, the normal power supply cannot be supplied, and the existing power supply mostly uses diodes for rectification, and the high-frequency signal of the power grid and the power frequency signal are modulated on the diode, which affects the operation of the circuit.

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