A Dimmable LED Driver with Partial Power Regulation

被引：0
|
作者：
Moo, Chin-Sien [1 ]
Chen, Yu-Jen [1 ]
Li, Yong-Jyun [1 ]
Yen, Hau-Chen [2 ]
机构：
[1] Natl Sun Yat Sen Univ, Dept Elect Engn, Kaohsiung, Taiwan
[2] Far East Univ, Dept Elect Engn, Tainan, Taiwan
来源：
IECON 2015 - 41ST ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY | 2015年
关键词：
light-emitting-diode (LED); partial power regulation; flyback converter; double pulse-width modulation (DPWM);
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A dimmable light-emitting-diode (LED) driver circuit with partial power regulation is proposed in this paper. A string of LEDs is driven by a dc source in series with a flyback converter. The LED current is regulated by the flyback converter by processing only a fractional power while the major power is directly supplied from the dc source. To dim the LEDs with a pulsed current with constant amplitude, the flyback converter is operated with double pulse-width modulation (DPWM). Experimental results on a laboratory circuit designed for a 48 W LED lamp have demonstrated the excellent efficiency of the driver with the proposed approach.
引用
收藏
页码：672 / 677
页数：6
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