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

Sang Gab Park, Byoung Kuk Lee and Jong Soo Kim
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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

Energies, 2020, vol. 13, issue 17, 1-17

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.

Keywords: LED driver; 3D; multi-output; inductor-inductor-capacitor (LLC); resonant converter; soft switching; SSPR; zero voltage switching (ZVS) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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