LED dimming circuit and LED lamp

Abstract

The invention discloses an LED dimming circuit which comprises an adjusting control module and a voltage stabilizing module. The adjusting control module comprises a current detecting potentiometer which is connected with an LED loader and used for adjusting the brightness of the LED loader. The voltage stabilizing module comprises a voltage comparer U1 and a voltage stabilizing control chip U2, wherein the normal phase input end of the voltage comparer U1 is connected with the current detecting potentiometer, the output end of the voltage comparer U1 is connected with the voltage stabilizing control chip U2 to be used for feeding adjustment of the current detecting potentiometer back to the LED loader through the voltage stabilizing control chip U2, and the voltage stabilizing control chip U2 is used for adjusting and stabilizing voltage at the two ends of the LED loader according to the electrical level of the output end of the voltage comparer U1. The invention further discloses an LED lamp. The LED dimming circuit can stably adjust the brightness of the LED loader, meets various requirements of people, guarantees that a light source is stable and free of flickering when being adjusted, reduces energy loss caused by resistance heating and improves energy utilization rate.

Description

technical field [0001] The invention relates to the lighting field, in particular to an LED dimming circuit and an LED lamp. Background technique [0002] As a new light source, LED has the characteristics of energy saving, environmental protection and high efficiency, and has been widely used in various lighting fields. Most of the existing LED lamps cannot adjust the brightness, and usually can only be illuminated with one or two brightness levels set at the factory, which cannot meet people's diverse lighting needs. However, for a small number of LED lamps that can adjust the brightness, the dimming circuit is complicated, and the useless power consumption in the circuit is too large, which is not conducive to the effective use of energy. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an LED dimming circuit and an LED lamp. It can meet people's diverse lighting needs and improve energy efficiency. [0004]...

AI Technical Summary

Problems solved by technology

Most of the existing LED lamps cannot adjust the brightness, and usually can only be illuminated with one or two brightness levels set at the factory, which cannot meet people's diverse lighting needs

However, for a small number of LED lamps that can adjust the brightness, the dimming circuit is complicated, and the useless power consumption in the circuit is too large, which is not conducive to the effective use of energy.

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