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An Investigation of Operational Challenges in MHz Power Converters

Author

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  • Aqarib Hussain

    (Molinaroli College of Engineering and Computing, Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208, USA)

  • Andrew Boland

    (Molinaroli College of Engineering and Computing, Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208, USA)

  • Regan Varner

    (Molinaroli College of Engineering and Computing, Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208, USA)

  • David Matolak

    (Molinaroli College of Engineering and Computing, Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208, USA)

  • Kristen Booth

    (Molinaroli College of Engineering and Computing, Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208, USA)

Abstract

Megahertz switching frequencies in converters significantly reduce the size of passive components, enabling high power density. However, these frequencies also introduce operational challenges, such as the semiconductor device reliability, thermal management, magnetic design and electromagnetic interference. This paper discusses a dc-dc converter operating at 1 MHz and its associated design challenges. The relationship between a GaN device on-resistance, junction temperature and losses in scenarios where the converter operates beyond its nominal design specifications is analyzed. Additionally, a PCB-based inductor is fully characterized and the parasitic effects of PCB traces are examined for a 1-MHz, 1-kW application. Finally, the conducted and radiated emissions of the converter are addressed, supported by simulation and hardware experimental measurements.

Suggested Citation

  • Aqarib Hussain & Andrew Boland & Regan Varner & David Matolak & Kristen Booth, 2025. "An Investigation of Operational Challenges in MHz Power Converters," Energies, MDPI, vol. 18(4), pages 1-12, February.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:4:p:835-:d:1588513
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