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논문 기본 정보

자료유형
학술저널
저자정보
Sang-Soo Hwang (Kookmin University) Won-Sun Hwang (Kookmin University) Sang-Kyoo Han (Kookmin University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.15 No.2
발행연도
2015.3
수록면
319 - 326 (8page)

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초록· 키워드

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In this paper, a cost-effective single switch multi-channel LED (light emitting diode) driver is proposed. While conventional LED drivers require as many non-isolated DC/DC converters as the number of LED channels, the proposed LED driver needs only one power switch and several balancing capacitors instead of expensive non-isolated DC/DC converters. Therefore, the proposed driver features a simpler structure, with a lower cost and a higher efficiency. Because its power switch can be turned off under the zero current switching condition, it has very desirable advantages such as improved electromagnetic interference characteristics and high efficiency. Moreover, it uses only a small number of DC blocking capacitors with no additional active devices for the current balancing of multi-channel LEDs. As a result, the proposed driver exhibits high reliability and is cost effective. To confirm the validity of the proposed driver, a theoretical analysis is performed, and design considerations and experimental results obtained from a prototype that is applicable to a 46” LED-TV are presented.

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Abstract
Ⅰ. INTRODUCTION
Ⅱ. CONVENTIONAL LED DRIVER
Ⅲ. PROPOSED LED DRIVER
Ⅳ. OPERATING PRINCIPLES OF PROPOSED LED DRIVER
Ⅴ. ANALYSIS OF THE PROPOSED LED DRIVER
Ⅵ. EXPERIMENTAL RESULTS
Ⅶ. CONCLUSIONS
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