Control circuit capable of regulating color rendering index for energy-saving light-emitting diode (LED) lamp

Abstract

The invention aims to provide a control circuit capable of regulating a color rendering index for an energy-saving light-emitting diode (LED) lamp. By the control circuit, high LED light emitting consistency is achieved, and light emitting color temperature can be regulated according to different requirements. The control circuit comprises a constant current power supply, wherein the constant current power supply is connected with a micro control unit (MCU) control chip; the output end PWM1 of the MCU control chip is connected with a constant current control circuit which supplies power to a first group of LED module; the output end PWM2 of the MCU control chip is connected with another constant current control circuit which supplies power to a second group of LED module; and the output end PWM3 of the MCU control chip is connected with a third constant current control circuit which supplies power to a third group of LED module. By the invention, the utilization rate of an LED is increased; and the control circuit is more energy-saving, more environment-friendly and applied to the LED lamp.

Description

technical field [0001] The invention relates to a control circuit, more specifically, to a control circuit used in energy-saving LED lamps with adjustable color rendering index. Background technique [0002] The control circuit of the LED light in the prior art is a voltage stabilizing circuit. Due to the reason of the LED itself due to the silicon chip, there will be various LEDs with different voltages in the production of a batch of finished LEDs. Even for the same batch of finished LED products, each The power supply voltage required by the LED light-emitting chip is also different. At this time, if LEDs with different voltages are connected in series or in parallel and driven by a voltage regulator circuit, the light they emit will also be different, and it will look different in light and dark. Different, LED lights have poor consistency of light emission. The technical defects in the LED lamp control circuit in the prior art have become urgent technical problems to b...

AI Technical Summary

Problems solved by technology

[0003] The technical purpose of the present invention is to overcome the technical problems in the prior art that the poor consistency of the light-emitting chip when the LED lamp emits light leads to inconsistent light and shade, and it is difficult to adjust the light-emitting light; to provide an LED that has good light-emitting consistency and can adjust the light-emitting according to different requirements. Control circuit with adjustable color rendering index in energy-saving LED lamps with color temperature

Images