Conference paper
Frequency dependent loss analysis and minimization of system losses in switchmode audio power amplifiers
In
Proceedings of the 137th Aes Convention
—
2014
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.
| Language: | English |
|---|---|
| Publisher: | Audio Engineering Society |
| Year: | 2014 |
| Proceedings: | AES 137th Convention |
| Types: | Conference paper |
| ORCIDs: | Knott, Arnold , Jørgensen, Ivan Harald Holger and Andersen, Michael A. E. |
