Reference current correction type energy-saving power supply circuit used for cold light LED

Abstract

The invention discloses a reference current correction type energy-saving power supply circuit used for a cold light LED. The circuit is characterized in that the circuit is mainly composed of a control chip U2, a reference current correction circuit, a thyristor trigger circuit, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C5, a resistor R9 one end of which is connected with a positive electrode of the polar capacitor C5 and the other end is connected with a GND pin of the control chip U2 and then is grounded, a polar capacitor C9 serially connected between a non-dotted end and a dotted end of a secondary side inductance coil of the transformer T, and a low pass filter circuit serially connected between the diode rectifier U1 and the transformer T. According to the invention, the voltage and current on an input end can be filtered, so that the input voltage and current are more stable; in addition, the strength of the filtered voltage and current is adjusted, and the movement of the electromagnetic waves of the current is maintained in a uniform speed state, so that a stable work current can be output, and the brightness stability of an LED and the like is ensured.

Description

technical field [0001] The invention relates to the field of electronic energy saving, in particular to an energy-saving power supply circuit for a reference current correction type cold light LED. 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 load capacity and unstable output current, which leads to unstable brightness, power consumption, and short service life of LED lamps. [0003] Therefore, it is urgent to provide an LED power supply circuit that can not only increase the load capacity, but also ensure the stability of the out...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of poor load capacity and unstable output current in the LED voltage circuit in the prior art, and provide a reference current correction type energy-saving power supply circuit for cold light LEDs

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