A high power switch-mode power audio amplifier

Niels Elkjær Iversen, Jóhann S. Björnsson, Patrik Boström, Lars Press Petersen

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


    Switch-mode power audio amplifiers, also known as class-D, have become the conventional choice for high power applications. This paper presents the considerations for designing a high power audio amplifier power stage. This includes an overview of loss mechanism including reverse recovery losses which are increasingly important at higher output powers. A 4 kW prototype amplifier is implemented. Absolute maximum ratings shows up to +/- 190 V output voltage swing and 6.5 kW for sine wave burst. THD+N levels go down to 0.003 % for 100 Hz and are generally below 0.1 % up to clipping at 4 kW in a 4 Ω load.
    Original languageEnglish
    Title of host publicationProceedings of 146th Audio Engineering Society International Convention
    PublisherAudio Engineering Society
    Publication date2019
    Publication statusPublished - 2019
    Event146th Audio Engineering Society Convention - The Convention Centre Dublin, Dublin , Ireland
    Duration: 20 Mar 201923 Mar 2019
    Conference number: 146


    Conference146th Audio Engineering Society Convention
    LocationThe Convention Centre Dublin


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