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Optimal Design of Multi-Output LLC Resonant Converter with Independently Regulated Synchronous Single-Switched Power-Regulator

Author

Listed:
  • Sang Gab Park

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon-si 16419, Korea)

  • Byoung Kuk Lee

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon-si 16419, Korea)

  • Jong Soo Kim

    (Department of Electrical Engineering, Daejin University, Pocheon-si 11159, Korea)

Abstract

This paper presents a tightly regulated multi-output isolated converter that employs only an independently regulated synchronous Single-Switched Post-Regulator (SSPR). The proposed converter is a highly accurate single-ended secondary side post-regulator based on a Series Resonant Converter (SRC); furthermore, it has a voltage-doubler characteristic. The proposed post-regulator requires only one auxiliary switch, in contrast with a bulky and expensive non-isolated DC–DC converter. Moreover, the added voltage-doubler can tightly regulate the slave output current. In addition, the voltage-doubler can improve electromagnetic interference characteristics and reduce switching losses arising from the Zero Current Switching (ZCS) operation of all power switches. The validity of the proposed converter is verified using experimental results obtained via a prototype converter applicable to an LED 3D TV power supply.

Suggested Citation

  • Sang Gab Park & Byoung Kuk Lee & Jong Soo Kim, 2020. "Optimal Design of Multi-Output LLC Resonant Converter with Independently Regulated Synchronous Single-Switched Power-Regulator," Energies, MDPI, vol. 13(17), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4341-:d:402478
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    References listed on IDEAS

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    1. Junhao Luo & Junhua Wang & Zhijian Fang & Jianwei Shao & Jiangui Li, 2018. "Optimal Design of a High Efficiency LLC Resonant Converter with a Narrow Frequency Range for Voltage Regulation," Energies, MDPI, vol. 11(5), pages 1-17, May.
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