A Buck Converter with Cost-Effective GaN/Si Hybrid Switches and CRM Operation for High-Efficiency and High-Power-Density Applications

Dong Liu, Yanbo Wang, Zhe Chen, Bin Li

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)
7 Downloads (Pure)

Abstract

A buck converter with hybrid switch and critical current mode (CRM) operation is proposed in this paper for high efficiency and high power density applications, in which GaN device is used for main switch and Si device is used for auxiliary switch. A comparison study of the buck converter with hybrid switch, with only Si devices, and with only GaN devices is conducted under the CRM operation to evaluate the performance in terms of power losses and costs. The comparison results demonstrate that the buck converter with hybrid switch can not only achieve the higher efficiency in comparison with the buck converter with only Si devices but also reduce the cost in comparison with the buck converter with only GaN devices, which make it more suitable for the industrial applications. Furthermore, the simulation results present the detailed operation performances of the proposed converter with CRM operation.
Original languageEnglish
Title of host publicationProceedings of the 4th IEEE Southern Power Electronics Conference (SPEC 2018)
Number of pages6
PublisherIEEE
Publication dateDec 2018
Pages1-6
ISBN (Print)978-1-5386-8258-6
ISBN (Electronic)978-1-5386-8257-9
DOIs
Publication statusPublished - Dec 2018
EventThe 4th IEEE Southern Power Electronics Conference, SPEC 2018 - Nanyang Technological University, Singapore
Duration: 10 Dec 201813 Dec 2018

Conference

ConferenceThe 4th IEEE Southern Power Electronics Conference, SPEC 2018
LocationNanyang Technological University
CountrySingapore
Period10/12/201813/12/2018

Keywords

  • Buck converter
  • critical current mode (CRM)
  • hybrid switches (GaN and Si)
  • zero-voltage switching (ZVS)

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