串联谐振恒流LED驱动电源的分析及设计  

Analysis and Design of a Series-resonant Constant Current LED Driver

作　　者：孙明坤[1] 周雒维[1] 罗全明[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电力电子技术》2010年第8期93-94,共2页Power Electronics

基　　金：国家自然科学基金(50907076);高等学校博士学科点专项科研基金资助项目(200611012)~~

摘　　要：用串联谐振变换器来实现LED的开环恒流驱动。对串联谐振变换器开环工作状态进行等效分析,确定了开环恒流条件和谐振参数与开关频率的选择依据,以及LED数目、变压器变比对恒流效果的影响,为LED数目的确定及变压器变比的选择提供了依据。据此设计了谐振变换器,并进行了仿真与实验。结果证实了所提出的分析设计方法的正确性。In order to achieve open-loop constant current（OCC）driver for LED,a series-resonant converter is used.The working condition of a series-resonant converter is equivalently analyzed under OCC condition,and selection basis of resonant parameter and switching frequency are determined.The effect of LED number and transformer turns ratio to constant current is also determined,which provide scientific basis for the selection of LED number and transformer turns ratio.The series-resonant converter is designed by the analysis.The simulation and experimental results confirm the correctness of the proposed design method.

关 键 词：电源 发光二极管 串联谐振电路 开环恒流 

分 类 号：TN86[电子电信—信息与通信工程]