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

Akira Yamauchi; Arnold Knott; Ivan Harald Holger Jørgensen; Michael A. E. Andersen

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

Akira Yamauchi, Arnold Knott, Ivan Harald Holger Jørgensen, Michael A. E. Andersen

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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 language	English
Title of host publication	Proceedings of the 137th AES Convention
Number of pages	9
Publisher	Audio Engineering Society
Publication date	2014
Publication status	Published - 2014
Event	AES 137^th Convention - Los Angeles, United States Duration: 9 Oct 2014 → 12 Oct 2014

Conference

Conference	AES 137^th Convention
Country/Territory	United States
City	Los Angeles
Period	09/10/2014 → 12/10/2014

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@inproceedings{1cc032c0e3c24191b2813a72857f190a,

title = "Frequency dependent loss analysis and minimization of system losses in switchmode audio power amplifiers",

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. ",

author = "Akira Yamauchi and Arnold Knott and J{\o}rgensen, {Ivan Harald Holger} and Andersen, {Michael A. E.}",

year = "2014",

language = "English",

booktitle = "Proceedings of the 137th AES Convention",

publisher = "Audio Engineering Society",

note = "AES 137<sup>th</sup> Convention ; Conference date: 09-10-2014 Through 12-10-2014",

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T1 - Frequency dependent loss analysis and minimization of system losses in switchmode audio power amplifiers

AU - Yamauchi, Akira

AU - Knott, Arnold

AU - Jørgensen, Ivan Harald Holger

AU - Andersen, Michael A. E.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

M3 - Article in proceedings

BT - Proceedings of the 137th AES Convention

PB - Audio Engineering Society

T2 - AES 137<sup>th</sup> Convention

Y2 - 9 October 2014 through 12 October 2014

ER -

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

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