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%.
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机译：提出了一种4x45W（EIAJ）单片汽车音频功率放大器，通过在扬声器之间共享负载电流，与标准AB类操作相比，其功耗降低了近2倍。输出信号使用共模控制环路进行调节，以允许在开关之间放置开关，而总谐波失真（THD）增大最小。通过SOI双极CMOS-DMOS工艺实现了原型，其特征尺寸为0.5μm。模具面积为7.5x4.6mm2。 THD + N @（1kHz，10W）为0.05％。
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