Cascaded Switched-Capacitor dc-dc Converters for a USB Power Delivery Compliant Charger

Jacob E. F. Overgaard, Jens Christian Hertel, Tiberiu-Gabriel Zsurzsan, Zhe Zhang

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

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    Abstract

    The improvements in modern circuit technology reduce system size, improve the efficiency and reduce the cost. Utilization of soft-switching resonant power converters give high density high effeciency power converters for narrow output voltage ranges. To overcome this a cascaded switched-capacitor dc-dc converter is used to implement a Universal Serial Bus Power Delivery compliant charger. The converter uses a custom designed application specific integrated circuit designed for switched-capacitor dc-dc converters and wide bandgap technology allowing high frequency, high power design. The converter achieves peak efficiencies up to 98 % at 60 W output power with a corresponding junction temperature of 50 ◦C. Worst case junction temperatures reach 64 ◦C and is viable for use in longterm battery charger systems. The cascaded power stages take up 14 mm × 22 mm.
    Original languageEnglish
    Title of host publicationProceedings of 4 th IEEE International Future Energy Electronics Conference
    Number of pages8
    PublisherIEEE
    Publication date2019
    ISBN (Print)978-1-7281-3153-5
    Publication statusPublished - 2019
    Event2019 IEEE 4th International Future Energy Electronics Conference - Parkroyal on Beach Road, Singapore, Singapore
    Duration: 25 Nov 201928 Nov 2019
    Conference number: 4
    https://ieeexplore.ieee.org/xpl/conhome/8995899/proceeding

    Conference

    Conference2019 IEEE 4th International Future Energy Electronics Conference
    Number4
    LocationParkroyal on Beach Road
    Country/TerritorySingapore
    CitySingapore
    Period25/11/201928/11/2019
    Internet address

    Keywords

    • Battery chargers
    • Switched mode power supplies
    • ASIC
    • Analog integrated circuit

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