Frequency Dependent Loss Analysis and Minimization of System Losses in Switch-Mode Audio Power Amplifiers

Yamauchi A, Knott A, Jørgensen IHH, Andersen MAE. Frequency Dependent Loss Analysis and Minimization of System Losses in Switch-Mode Audio Power Amplifiers. In: AES Convention 137. Audio Engineering Society; 2014. Paper 9193. Available from: https://aes.org/publications/elibrary-page/?id=17516

@inproceedings{Yamauchi2014_17516,
  author = {Yamauchi, Akira and Knott, Arnold and Jørgensen, Ivan H. H. and Andersen, Michael A. E.},
  title = {{Frequency Dependent Loss Analysis and Minimization of System Losses in Switch-Mode Audio Power Amplifiers}},
  booktitle = {AES Convention 137},
  note = {Paper 9193},
  year = {2014},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17516}
}

TY  - CPAPER
TI  - Frequency Dependent Loss Analysis and Minimization of System Losses in Switch-Mode Audio Power Amplifiers
AU  - Yamauchi, Akira
AU  - Knott, Arnold
AU  - Jørgensen, Ivan H. H.
AU  - Andersen, Michael A. E.
T2  - AES Convention 137
M1  - Paper 9193
PY  - 2014
DA  - 2014/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17516
PB  - Audio Engineering Society
LA  - en
AB  - In this paper the frequency dependent losses in switch-mode audio power amplifiers are analyzed and the 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 the system power losses of the reference design are minimized and an efficiency improvement of 8% in maximum is achieved without compromising audio performances.
ER  -