Gallium Nitride (GaN) based power transistors are gaining more and more attention since the introduction of the enhancement mode eGaN Field Effect Transistor (FET), which makes an adaptation from Metal-Oxide Semiconductor (MOSFET) to eGaN based technology less complex than by using depletion mode GaN FETs. This project seeks to investigate the possibilities of using eGaN FETs as the power switching device in a full bridge power stage intended for switch mode audio amplification. A 50 W 1 MHz power stage was built and provided promising audio performance. Future work includes optimization of dead time and investigation of switching frequency versus audio performance.

Authors: Ploug, Rasmus Overgaard; Knott, Arnold; Poulsen, Søren Bang
Affiliations: Technical University of Denmark, Kgs. Lyngby, Denmark; Texas Instruments Denmark A/S, Kongens Lyngby, Denmark(See document for exact affiliation information.)
AES Convention: 138 (May 2015) Paper Number: 9273
Publication Date: May 6, 2015
Subject: Transducers

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