A High-Voltage class-D power amplifier with switching frequency regulation for improved high-efficiency output power range

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    Abstract

    This paper describes the power dissipation analysis and the design of an efficiency-improved high-voltage class-D power amplifier. The amplifier adaptively regulates its switching frequency for optimal power efficiency across the full output power range. This is based on detecting the switching output node voltage level at the turn-on transition of the power switches. Implemented in a 0.14 m SOI BCD process, the amplifier achieves 93% efficiency at 45 W output power,80% power efficiency down to 4.5 W output power and 49% efficiency down to 0.45 W output power.
    Original languageEnglish
    Pages (from-to)1451-1462
    Number of pages12
    JournalIEEE journal of solid-state circuits
    Volume50
    Issue number6
    DOIs
    Publication statusPublished - 1 Jun 2015

    Keywords

    • EWI-26096
    • IR-96384
    • METIS-312649

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