Derivation and Analysis of a Low-Cost, High-performance Analogue BPCM Control Scheme for Class-D Audio Power Amplifiers

Mikkel Christian Wendelboe Høyerby, Michael A. E. Andersen

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

    299 Downloads (Pure)

    Abstract

    This paper presents a low-cost analogue control scheme for class-D audio power amplifiers. The scheme is based around bandpass current-mode (BPCM) control, and provides ample stability margins and low distortion over a wide range of operating conditions. Implementation is very simple and does not require the use of operational amplifiers. Small-signal behavior of the controller is accurately predicted, and design is carried out using standard transfer function based linear control methodology. Effectiveness of the approach is demonstrated via a 60W/8Ω single-ended switching amplifier with THD+N of typically 0.02%.
    Original languageEnglish
    Title of host publicationAES 27th Conference "Efficient Audio Power Amplification"
    Number of pages7
    Publication date2005
    Publication statusPublished - 2005
    EventAES 27th Conference "Efficient Audio Power Amplification" - Hillerød, Denmark
    Duration: 2 Sept 20054 Sept 2005

    Conference

    ConferenceAES 27th Conference "Efficient Audio Power Amplification"
    Country/TerritoryDenmark
    CityHillerød
    Period02/09/200504/09/2005

    Fingerprint

    Dive into the research topics of 'Derivation and Analysis of a Low-Cost, High-performance Analogue BPCM Control Scheme for Class-D Audio Power Amplifiers'. Together they form a unique fingerprint.

    Cite this