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원기식(Ki-Sik Won),이달우(Darl-Woo Lee),안태영(Tae-Young Ahn),김성철(Sung-Cheol Kim),장찬규(Chan-Gyu Jang),김용주(Young-Joo Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper presents a new voltage-current driven method for the synchronous rectifier (SR) in a flyback topology. The proposed synchronous rectifier of voltage-current driven can operate at wide load range with high efficiency. The gate voltage of MOSFET in the synchronous rectifier is easily controlled by resistor ratio. regardless of line and load fluctuation. The 200W (12V/17A) prototype is built and achieve efficiency as high as 90% at 7A, 90.5% at 10A and full load.
전류비교형 동기정류기를 이용한 LLC 공진형 하프브리지 컨버터
이광택(Gwang-Taek Lee),이달우(Darl-Woo Lee),안태영(Tae-Young Ahn),김성철(Sung-Cheol Kim),장찬규(Chan-Gyu Jang),김용주(Young-joo Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper presents a synchronous rectifier in a LLC half bridge topology. The proposed synchronous rectifier is used to a current driven synchronous rectifier(SR). Voltage driven synchronous rectifier may introduce voltage and current surge during the zero dead times. To solve this problem, we propose to use modified current driven synchronous rectifier. Finally, the prototype is built and comparison on the current and voltage driven synchronous rectifier(SR).