Abstract
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 on both audio performance and the efficiency at high power levels.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of Audio Engineering Society 138th Convention |
| Number of pages | 9 |
| Publisher | Audio Engineering Society |
| Publication date | 2015 |
| Article number | 9286 |
| Publication status | Published - 2015 |
| Event | 138th Audio Engineering Society Convention - Warsaw, Poland Duration: 7 May 2015 → 10 May 2015 Conference number: 138 |
Conference
| Conference | 138th Audio Engineering Society Convention |
|---|---|
| Number | 138 |
| Country/Territory | Poland |
| City | Warsaw |
| Period | 07/05/2015 → 10/05/2015 |
