The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Analysis and Design for Ripple Generation Network Circuit in Constant-on-Time-Controlled Fly-Buck Converter

COT 제어 플라이벅 컨버터를 위한 전압 리플 보상회로의 분석 및 설계

  • Cho, Younghoon (Dept. of Energy & Electrical Engineering, Tech University of Korea) ;
  • Jang, Paul (Dept. of Energy & Electrical Engineering, Tech University of Korea)
  • Received : 2021.10.06
  • Accepted : 2021.12.02
  • Published : 2022.04.20
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Abstract

Multiple output converters can be utilized when various output voltages are required in applications. Recently, one of the multiple output converters called fly-buck has been proposed, and has attracted attention due to the advantage that multiple output can be easily obtained with a simple structure. When constant on-time (COT) control is applied, the output ripple voltage must be treated carefully for control stability and voltage regulation characteristics in consideration of the inherent energy transfer characteristics of the fly-buck converter. This study analyzes the operation principle of the fly-buck converter with a ripple generation network and presents the design guideline for the improved output voltage regulation. Validity of the analysis and design guideline is verified using a 5 W prototype of the COT controlled fly-buck converter with a ripple generation network for telecommunication auxiliary power supply.

Keywords

Acknowledgement

본 연구는 2021년도 과학기술정보통신부 재원으로 한국에너지기술연구원(KIER)의 지원을 받아 수행되었습니다. (KIER-C1-2420)

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