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Soft-Switching Auxiliary Current Control for Improving Load Transient Response of Buck Converter

Cited 10 time in Web of Science Cited 11 time in Scopus
Authors

Kim, Dongwook; Hong, Myeongjae; Baek, Jongun; Lee, Jisu; Shin, Joonho; Shin, Jong-Won

Issue Date
2021-03
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol.36 No.3, pp.2488-2494
Abstract
An auxiliary current control is proposed herein to improve the load transient response of the buck converter. The proposed technique increases the efficiency of the auxiliary converter by employing soft switching. The design guidelines for achieving a capacitor charge balance for the output capacitor during the transition are also presented. The simulation results revealed that the output voltage overshoot and settling time during the load step-down transient were 62mVand 29.4 mu s, respectively; however, in the case of conventional time-optimal control, these values were 666 mV and 57.2 mu s, respectively, under the same condition. The estimated power loss of the proposed scheme was only 45%-60% of those of the conventional counterparts. The performance and effectiveness of the technique were experimentally verified using a prototype buck converter with a 15 V input, 3.3 V output, and 200 kHz switching frequency.
ISSN
0885-8993
URI
https://hdl.handle.net/10371/201446
DOI
https://doi.org/10.1109/TPEL.2020.3016960
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  • College of Engineering
  • Department of Electrical and Computer Engineering
Research Area DC-DC and AC-DC power conversion, DC-DC 및 AC-DC 전력변환, converter modeling, high-density, high-frequency power conversion, 고밀도 고주파 전력 변환, 컨버터 모델링

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