An Optocouplerless Two-stage High Power Factor LED Driver

被引：0
作者：
Xie, Xiaogao [1 ]
Ye, Meipan [2 ]
Cai, Yongjun [3 ]
Wu, Jianxing [3 ]
机构：
[1] Hangzhou Dianzi Univ, Coll Automat, Hangzhou 310018, Zhejiang, Peoples R China
[2] Hangzhou Dianzi Univ, Coll Informat Engn, Hangzhou 310018, Zhejiang, Peoples R China
[3] Hangzhou Silan Microelect Ltd, Hangzhou 310012, Zhejiang, Peoples R China
来源：
2011 TWENTY-SIXTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC) | 2011年
关键词：
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An optocouplerless two-stage high power factor LED driver is proposed in this paper. The first stage is an optocouplerless isolated PFC converter and the second stage is a constant-current controlled non-isolated DC/DC LED driver. Optocoupler and secondary amplifier circuit of the first PFC stage can be removed. Besides, the output capacitor s of the PFC stage can be reduced due to low output ripple voltage requirement and acceptable wide input voltage range of the secondary stage in the two-stage LED driver. Hence the circuit structure of the proposed optocouplerless two-stage high power factor LED Driver is much simplified. A prototype LED driver for 12W LED fluorescent tube is built up to verify theoretical analysis and experiment results are presented.
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页码：2078 / 2083
页数：6
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