Journal of Industrial Technology (산업기술연구)

Kangwon National University, Institute of Industrial Technology (강원대학교 산업기술연구소)
권호 표지

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

밸리 필 회로 및 부스팅 인덕터를 이용한 LED 구동회로의 역률 개선

  • 박종연 (강원대학교 전기전자공학과) ;
  • 이학범 (강원대학교 전기전자공학과) ;
  • 유진완 (강원대학교 전기전자공학과)
  • Published : 2011.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords