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Design for White Light LED Constant-current Controllable Driving System
Author(s): 
Pages: 29-31
Year: Issue:  4
Journal: ELECTRIC SWITCHGEAR

Keyword:  白光LEDBUCKPWM;
Abstract: 白光LED以其特有的节能、环保、响应快、长寿命、可靠性高等显著优势迅速取代日光灯和白炽灯成为通用照明领域的主流产品.在汽车或室外作业照明场合,通常是以12伏或24伏等蓄电池为直流电源.课题以此为背景,根据大功率白光LED的电学、光学特性,以SG3524芯片为核心器件,配以外围BUCK降压电路、检测放大电路以及电源转换电路并实现了一种适用范围广、成本低、易维护的大功率白光LED可控恒流源驱动系统.经试验,该系统很好地实现了恒流特性.
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