산업기술연구 (Journal of Industrial Technology)

  • 제31권A호
  • /
  • Pages.103-107
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  • 2011
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  • 1229-9588(pISSN)
  • /
  • 1598-1371(eISSN)
강원대학교 산업기술연구소 (Kangwon National University, Institute of Industrial Technology)
권호 표지

밸리 필 회로 및 부스팅 인덕터를 이용한 LED 구동회로의 역률 개선

Power factor improvement of LED driver using Valley-fill circuit and a Boosting Inductor

  • 박종연 (강원대학교 전기전자공학과) ;
  • 이학범 (강원대학교 전기전자공학과) ;
  • 유진완 (강원대학교 전기전자공학과)
  • 발행 : 2011.02.28
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초록

In this paper, a method is proposed to improve power factor and the input current THD in LED driver circuit. The researched circuit consists of a valley-fill circuit and boosting inductor and a Buck converter. Valley-fill circuit is a passive PFC and simplified structure, the buck converter is operated with current feedback. The switching frequency is 50KHz in LED driver circuit and LED forward current is constant. A valley-fill type PFC circuit for LED driver(15Watt) has been implemented, and the validity of proposed method is shown by is simulation and experimental result.

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