A power supply circuit for gate driver of GaN-based flying capacitor multi-level converters

Zichao Ye, Robert Carl Nikolai Pilawa Podgurski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recently, flying capacitor multi-level (FCML) converters with GaN power switches have received increased attention due to their potential to achieve high efficiency and high power density. However, one of the major challenges is providing power to the gate drive circuits, most of which are not ground referenced. The most common existing method utilizes isolated DC/DC converters, which are bulky, expensive and energy inefficient. This work introduces two new techniques that leverage inherent properties of the FCML topology and the GaN switches to provide gate drive power to the floating switches with minimum hardware requirements. The two methods, termed cascaded bootstrap and gate driven charge pump, are analyzed in details and their performance evaluated. A new power supply circuit combining the two techniques can help shrink the size of the converter, and further increase the converter's power density. Experimental results show that the proposed circuit is up to 5× more power efficient than conventional solutions, at 1/10 of the cost.

Original languageEnglish (US)
Title of host publicationWiPDA 2016 - 4th IEEE Workshop on Wide Bandgap Power Devices and Applications
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages53-58
Number of pages6
ISBN (Electronic)9781509015764
DOIs
StatePublished - Dec 27 2016
Event4th IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2016 - Fayetteville, United States
Duration: Nov 7 2016Nov 9 2016

Publication series

NameWiPDA 2016 - 4th IEEE Workshop on Wide Bandgap Power Devices and Applications

Other

Other4th IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2016
CountryUnited States
CityFayetteville
Period11/7/1611/9/16

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Ye, Z., & Pilawa Podgurski, R. C. N. (2016). A power supply circuit for gate driver of GaN-based flying capacitor multi-level converters. In WiPDA 2016 - 4th IEEE Workshop on Wide Bandgap Power Devices and Applications (pp. 53-58). [7799909] (WiPDA 2016 - 4th IEEE Workshop on Wide Bandgap Power Devices and Applications). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WiPDA.2016.7799909