Efficiency Optimization in Class-D Audio Amplifiers

Yamauchi A, Knott A, Jørgensen IHH, Andersen MAE. Efficiency Optimization in Class-D Audio Amplifiers. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9286. Available from: https://aes.org/publications/elibrary-page/?id=17710

@inproceedings{Yamauchi2015_17710,
  author = {Yamauchi, Akira and Knott, Arnold and Jørgensen, Ivan H. H. and Andersen, Michael A. E.},
  title = {{Efficiency Optimization in Class-D Audio Amplifiers}},
  booktitle = {AES Convention 138},
  note = {Paper 9286},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17710}
}

TY  - CPAPER
TI  - Efficiency Optimization in Class-D Audio Amplifiers
AU  - Yamauchi, Akira
AU  - Knott, Arnold
AU  - Jørgensen, Ivan H. H.
AU  - Andersen, Michael A. E.
T2  - AES Convention 138
M1  - Paper 9286
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17710
PB  - Audio Engineering Society
LA  - en
AB  - This paper presents a new power efficiency optimization routine for designing Class-D audio amplifiers. The proposed optimization procedure finds design parameters for the power stage and the output filter, and the optimum switching frequency such that the weighted power losses are minimized under the given constraints. The optimization routine is applied to minimize the power losses in a 130 W class-D audio amplifier based on consumer behavior investigations, where the amplifier operates at idle and low power levels most of the time. Experimental results demonstrate that the optimization method can lead to around 30% of efficiency improvement at 1.3 W output power without significant effects both on the audio performances and on the efficiency at high power levels.
ER  -