A New High Efficiency Boost LED Driver Circuit for Edge-Lit LED Backlight Units

被引：0
|
作者：
Yun, Jae-Jung [1 ]
Choe, Hyung-Jin [2 ]
Lee, Cheewoo [3 ]
机构：
[1] Daegu Univ, Dept Elect & Elect Engn, Geongsan, South Korea
[2] LG Display, Liquid Crystal Display Div, Paju, South Korea
[3] Pusan Natl Univ, Dept Elect Engn, Busan, South Korea
来源：
TENCON 2015 - 2015 IEEE REGION 10 CONFERENCE | 2015年
关键词：
boost converter; light emitting diode(LED); LED driver; soft-switching;
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：
This paper presents a method of improving power conversion efficiency of a boost LED driver circuit for edge-lit LED Backlight Units. The proposed circuit consists of a conventional boost converter and a new passive snubber circuit which consists of an inductor, two capacitors, and two diodes; it improves the problems relating to a high voltage gain and hard switching of the boost LED driver. The proposed boost LED driver was built and tested on the 42 inch edge-lit LED backlight. The power conversion efficiency of the proposed circuit with an input voltage of 24V, an output voltage of 114V, and an operating frequency of 280kHz was measured as 94%; this value was 13.4% higher than that of the conventional boost LED driver circuit.
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页数：3
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