Non-electrolytic capacitor LED driver with feedforward control

Author

Yi-Chien Shen;Tsorng-Juu Liang;Wei-Jing Tseng;Huan Hao Chang;Kai-Hui Chen;Yi-Ju Lu;Jhih-Sian Li

Author_Institution

Department of Electrical Engineering/Advanced Optoelectronic Technology Center (AOTC)/Green Energy Electronics Research Center (GREERC) National Cheng Kung University, Tainan, Taiwan

fYear

2015

Firstpage

3223

Lastpage

3230

Abstract

In this paper, the design and implementation of a non-electrolytic capacitor LED driver is proposed. The proposed driver includes a Boost PFC converter as first-stage and a LLC Resonant Converter as second-stage. With feedforward control, the output current ripple can be reduced without electrolytic capacitor, the lifetime of the driver will be increased. In this paper, the operating principles of the LLC resonant Converter with feed-forward control will be discussed. Besides, the optimized design of the proposed control scheme will be discussed, too. Finally, a two-stage non electrolytic capacitor LED driver is implemented to drive 150 W LED load. Experimental results show that the proposed circuit can be operated at 90~264V_rms AC input voltage range and the highest efficiency is 90.4 %. The output current ripple and LED efficacy will be also verified.

Keywords

"Light emitting diodes","Switching frequency","Capacitors","Control systems","Voltage control","Reactive power","Power generation"

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2015 IEEE

ISSN

2329-3721

Electronic_ISBN

2329-3748

Type

conf

DOI

10.1109/ECCE.2015.7310113

Filename

7310113