一种基于Triac调光的小功率LED驱动电路  

A Low Power LED Driver Based on Triac Dimming

作　　者：崔嘉杰[1] 王新宇[1] 罗萍[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《微电子学》2013年第4期488-490,498,共4页Microelectronics

基　　金：四川省科技计划资助项目(2010ZO0025)

摘　　要：介绍了Triac调光器的基本原理,对Triac调光器应用于LED照明中存在的问题进行了分析。采用TI公司的LM3445,设计了一款原边反馈反激式LED驱动电路。试验结果证明,该驱动电路解决了Triac调光器应用中的频闪问题,满足小功率LED调光应用的实际需要。The principle of Triac dimmer was described, and problems with application of Triac dimmer to LED lighting were analyzed. Based on LM3445 of Texas Instrument, a fly-back LED driver circuit with primary side feedback was designed. Experimental results showed that the driver circuit solved stroboscopic problem of Triac dimmers in actual applications, meeting the requirements of low power LED lighting.

关 键 词：Triac调光器 LLC谐振 发光二极管 多路输出 恒流驱动 

分 类 号：TN43[电子电信—微电子学与固体电子学]