Brightness adjustable high-stability driving system for blue light LED

Abstract

The invention a brightness adjustable high-stability driving system for a blue light LED. The system is characterized by mainly comprising a control chip U1, a light adjustment control circuit, a reference correction circuit, a gradient compensation circuit, a logic buffering circuit and an overcurrent protection output voltage stabilizing circuit, wherein the light adjustment control circuit, the reference correction circuit, the gradient compensation circuit and the logic buffering circuit are connected with the control chip U1, and the overcurrent protection output voltage stabilizing circuit is connected in series between the reference correction circuit and the logic buffering circuit; and the overcurrent protection output voltage stabilizing circuit is composed of an overcurrent protection circuit whose input end is connected with the reference correction circuit and a voltage stabilizing circuit whose input end is connected with the output end of the overcurrent protection circuit. According to the system, external electromagnetic interference can be eliminated or attenuated, voltage and current are limited so that the voltage and current are kept stable, and in practical use, the anti-electromagnetic-interference capability of the high-stability driving system is 2.5 times that of a present driving system, stable driving current can be output, and it is effectively ensured that the brightness of blue light LED lamps is stable.

Description

technical field [0001] The invention relates to the field of electronic energy saving, in particular to a high-steady-state drive system for blue LEDs with adjustable brightness. Background technique [0002] As a new type of energy-saving light source, LED lights have been widely accepted and adopted by people due to their environmental protection, energy saving, long life, and small size. Since LED is a semiconductor device with sensitive characteristics and has negative temperature characteristics, the driving system of LED plays a very important role in the stable and reliable working state of LED in the application process. [0003] With the continuous improvement of people's living standards, there are higher requirements for the energy consumption of the brightness of LED lights, whether at home or in stores, that is, people need to further improve the brightness of LED lights while requiring LED lights to have lower energy consumption. consumption. Therefore, peopl...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of poor anti-electromagnetic interference, unstable driving, and poor brightness adjustment accuracy in the LED drive system in the prior art, and provide a high-steady-state drive system for blue LEDs with adjustable brightness

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