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http://dx.doi.org/10.6113/TKPE.2010.15.1.35

A High Efficiency LED Driver Circuit using LLC Resonant Converter  

Shin, Dae-Seong (국민대 전자공학과)
Jung, Young-Jin (국민대 전자공학과)
Hong, Sung-Soo (국민대 전자정보통신공학부)
Han, Sang-Kyu (국민대 전자정보통신공학부)
Jang, Byung-Jun (국민대 전자공학과)
Kim, Jong-Hae (삼성전기(주) P&M 사업부)
Lee, Il-Oun (삼성전기(주) P&M 사업부)
Roh, Chung-Wook (국민대 전자정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.15, no.1, 2010 , pp. 35-42 More about this Journal
Abstract
This paper presents the Two-stage LED Driving system using LLC resonant converter for LED lighting application. Due to the existence of the nonisolation DC/DC converter to control the LED current and the light intensity, the conventional three-stage LED Driving system has the problem of low power conversion efficiency. To solve this problem, a novel scheme without any nonisolation DC/DC converter is proposed, in which, the isolated DC/DC converter, e.g., LLC resonant converter in the paper, can perform the LED current control and stage, e.g., PFC stage and LLC stage, the efficiency can be significantly improved. Moreover, the cost and the volume of the whole LED driving system can be reduced compared to those of the conventional ones. The operational principle and the characteristics of the proposed scheme are presented. The proposed scheme is verified experimentally with a 45W output prototype LED driver.
Keywords
LED Driver; High efficiency; LLC converter; PWM Dimming;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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