Direct energy conversion audio power amplifier represents total integration of switching-mode power supply and Class D audio power amplifier into one compact stage, achieving high efficiency, high level of integration, low component count and eventually low cost. This paper presents how self-oscillating modulators can be used with the direct switching-mode audio power amplifier to improve its performance by providing fast hysteretic control with high power supply rejection ratio, open-loop stability and high bandwidth. Its operation is thoroughly analyzed and experimental results from prototype amplifier are presented.
|Title of host publication||27th International AES Conference on Efficient Audio Power AMplification|
|Publication status||Published - 2005|
|Event||27th International AES Conference - Hillerød, Denmark|
Duration: 2 Sep 2005 → 4 Sep 2005
Conference number: 27
|Conference||27th International AES Conference|
|Period||02/09/2005 → 04/09/2005|