A design of a 10-W single-chip class D audio amplifier with very high efficiency using CMOS technology

Abstract

A one-chip integrated circuit (IC) of a 10-W class-D audio power amplifier with very high efficiency using CMOS technology is presented. A mixture of a class D output stage and a bridge tied load (BTL) is the main topology of the proposed amplifier. The new 10-W IC audio power amplifier operates at 12 V with the efficiency of more than 90% and the total harmonic distortion (THD) of 0.1%. The amplifier is implemented in a 4-/spl mu/m double-metal, single-poly CMOS technology that provides with relatively high voltage (12 V) MOSFETs.