Operation analysis of GaN-based MHz ZVS bridgeless dual SEPIC PFC

Yunfeng Liu, Xiaosheng Huang, Yi Dou, Ouyang Ziwei, Michael A.E. Andersen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    This paper presents an modified GaN-based bridgeless Dual single-ended primary inductor converter (SEPIC) PFC with full-range zero-voltage switching (ZVS) turn-on for the application of a step-down AC-DC converter. To achieve the ZVS turn-on for main switches, the conventional SEPIC PFC's synchronous diode is replaced by MOSFET. Thus, the synchronous switch can provide some negative current by adding more extra turn-on time after the current of the synchronous switch decrease to zero. Operational analysis of the bridgeless SEPIC PFC and theoretical analysis for the ZVS turn-on have been investigated. The analysis and design are verified by experimental results by a 97% peak efficiency 300 W prototype with a switching frequency range from 400 kHz to 1 MHz.
    Original languageEnglish
    Title of host publicationProceedings of 36th Annual IEEE Applied Power Electronics Conference and Exposition
    PublisherIEEE
    Publication date2021
    Pages252-259
    ISBN (Print)9781728189505
    DOIs
    Publication statusPublished - 2021
    Event2021 IEEE Applied Power Electronics Conference and Exposition - Virtual event, Phoenix, United States
    Duration: 14 Jun 202117 Jun 2021
    https://ieeexplore.ieee.org/xpl/conhome/9486978/proceeding

    Conference

    Conference2021 IEEE Applied Power Electronics Conference and Exposition
    LocationVirtual event
    Country/TerritoryUnited States
    CityPhoenix
    Period14/06/202117/06/2021
    Internet address

    Keywords

    • CRM bridgeless Dual-SEPIC PFC
    • Digital control
    • GaN device
    • ZVS
    • Dual-SEPIC PFC

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