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

A one-chip integrated circuit (IC) of a 10-W class-D audio power amplifier with very high efficiency using CMOS technology is presented in this paper. A mixture of a class D output stage and a bridge tied load (BTL) is the ma in topology of the proposed amplifier. The new 10-W IC audio power amplifie r operates at 12 V with the efficiency of more than 90% and the total harmo nic distortion (THD) of 0.1%. The amplifier is implemented in a 4-mu m doub le-metal, single-poly CMOS technology that provides with relatively high vo ltage (12V) technology MOSFETs.