基于Boost的大功率LED恒流驱动电路

High Power LED Driver Circuit with Constant Current Based on Boost

针对如何提高发光二极管(LED)驱动电源的可靠性等问题,提出了一种基于Boost的大功率LED恒流驱动电路,并对其工作原理和性能特点进行了分析。该电路主要采用以LM2577芯片为核心的Boost电路和I/V转换电路,可以串联多个LED,能提供恒定的驱动能力,使LED长时间工作时电流处于稳定状态,电路可靠性高,并通过实验加以验证。

Considering the problem of how to improve the reliability of LED driver circuit,this paper introduces a High Power LED Driver Circuit with Constant Current based on Boost,and analyses the working principle as well as the performance features of this circuit.This circuit uses boost way and I/V switching circuit,which supplies constant current drive ability and wires multiple LEDs.In addition,the boost way uses LM2577 as the core.It makes the LED current work in a steady state in a long time and has high reliability meanwhile.All aforementioned have been verified through experiments.