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Utilization of Non-Linear Converters for Audio Amplification

Class D amplifiers fits the automotive demands quite well. The traditional buck-based amplifier has reduced both the cost and size of amplifiers. However the buck topology is not without its limitations. The maximum peak AC output voltage produced by the power stage is only equal the supply voltage. The introduction of non-linear converters for audio amplification defeats this limitation. A Cuk converter, designed to deliver an AC peak output voltage twice the supply voltage, is presented in this paper. A 3V prototype has been developed to prove the concept. The prototype shows that it is possible to achieve an peak AC output voltage twice the supply voltage but also reveals some of the major obstacles and challenges which is also discussed.

Authors: Iversen, Niels; Birch, Thomas; Knott, Arnold
Affiliation: Technical University of Denmark, Lyngby, Denmark
AES Conference:48th International Conference: Automotive Audio (September 2012)
Paper Number:3-1 Import into BibTeX
Subject:System Architecture and Hardware - Automotive Amplifier Design

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