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New LED Driver Circuit to Reduce Voltage Stress  

Park, Kyu-Min (국민대 전자공학과)
Lee, Kwang-Il (국민대 전자공학과)
Hong, Sung-Soo (국민대 전자정보통신공학부)
Han, Sang-Kyoo (국민대 전자정보통신공학부)
Roh, Chung-Wook (국민대 전자정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.14, no.3, 2009 , pp. 243-250 More about this Journal
Abstract
This paper provides an novel two-stage LED driver circuit for LED lighting equipment. The proposed driver circuit reduces voltage stress in LED driver circuit by using multi-level output voltage of PFC flyback converter. The proposed circuit satisfies IEC61000-3-2 class C regulation that is applied to lighting equipment over 25W and uses PWM to control brightness of wide extent. In this paper, the principle of proposed driver circuit is presented. A prototype has been built and tested. The experimental results are presented to show the validity of the proposed circuit.
Keywords
LED; LED driver; two-stage LED;
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  • Reference
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