Frequency dependent loss analysis and minimization of system losses in switchmode audio power amplifiers

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Abstract

In this paper, frequency dependent losses in switch-mode audio power amplifiers are analyzed and a loss model is improved by taking the voltage dependence of the parasitic capacitance of MOSFETs into account. The estimated power losses are compared to the measurement and great accuracy is achieved. By choosing the optimal switching frequency based on the proposed analysis, the experimental results show that system power losses of the reference design are minimized and an efficiency improvement of 8 % in maximum is achieved without compromising audio performances.
Original languageEnglish
Title of host publicationProceedings of the 137th AES Convention
Number of pages9
PublisherAudio Engineering Society
Publication date2014
Publication statusPublished - 2014
EventAES 137th Convention - Los Angeles, CA, United States
Duration: 9 Oct 201412 Oct 2014

Conference

ConferenceAES 137th Convention
CountryUnited States
CityLos Angeles, CA
Period09/10/201412/10/2014

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