75 MHz discrete GaN based multi-level buck converter for envelope tracking applications

Alejandro Villarruel-Parra, Andrew Forsyth

    Research output: Contribution to conferencePaperpeer-review

    Abstract

    The operation, design and implementation are described of a multi-level buck converter for switching frequencies approaching 100MHz together with an isolated high-side driver. The analysis of the converter identifies the trade-offs amongst the number of levels, switching frequency, efficiency, and filter bandwidth, which are key considerations for Envelope Tracking (ET) applications. The results show that this topology is particularly suitable to limit power losses caused by semiconductor output capacitances and common-mode parasitic capacitances as well as to increase the output filter tracking bandwidth. The power loss results are validated through simulation and experimentally using a 30V, 14W two-level prototype and a 30V, 14W five-level prototype operating at 75MHz and built using discrete GaN devices.
    Original languageEnglish
    Publication statusPublished - 27 May 2019
    EventIEEE Applied Power Electronics Conference and Exposition (APEC) 2019 - Anaheim, CA, USA, USA
    Duration: 17 Mar 201921 Mar 2019

    Conference

    ConferenceIEEE Applied Power Electronics Conference and Exposition (APEC) 2019
    Abbreviated titleIEEE APEC 2019
    Period17/03/1921/03/19

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