A 4x45W (EIAJ) monolithic car audio power amplifier is
presented that achieves a power dissipation decrease of nearly 2x over standard class AB operation by sharing load currents between loudspeakers. Output signals are conditioned using a common-mode control loop to allow switch placement between loads with minimal THD increase. A prototype is realized in a SOI bipolar-CMOS-DMOS process with 0.5μm feature size. Die area is 7.5x4.6mm2. THD+N @(1kHz,10W) is 0.05%.
|Name||IEEE Symposium on VLSI Circuits (VLSIC)|
|Conference||2010 IEEE Symposium on VLSI Circuits, VLSIC 2010|
|Period||16/06/10 → 18/06/10|
- class AB
- Audio power amplifier