Mapping of theory of reverse recovery losses to the duty cycle distribution of audio signals with a double pulse tester

Andreas S. Petersen, Niels E. Iversen, Arnold Knott

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

Abstract

Switch-mode power amplifiers have become the conventional choice for audio amplification due to their very high efficiency and negligible THD+N performance. This paper proposes a new method to determine the reverse recovery loss theoretically. The Spice model from the manufacture is simulated with a Double pulse tester in LTspice. Mapping the reverse recovery behaviour for different currents and time periods allows it to be fitted to a model. The fitted model is used to estimate the reverse recovery loss in a Class-D audio amplifier power stage. The conventional model shows a 16 times larger loss compared to the fitted model for a worst case comparison.
Original languageEnglish
Title of host publicationProceedings of 149th Audio Engineering Society Convention 2020
PublisherAudio Engineering Society
Publication date2020
Publication statusPublished - 2020
Event149th Audio Engineering Society Convention 2020 - Virtual event
Duration: 21 Oct 202024 Oct 2020

Conference

Conference149th Audio Engineering Society Convention 2020
LocationVirtual event
Period21/10/202024/10/2020
Series149th Audio Engineering Society Convention 2020, Aes 2020

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