5.3 A 2x70W monolithic five level Class D audio power amplifier
The consumer electronics trends of miniaturization and portability have been pushing the integrated Class D audio power amplifier (PA) market for a number of years. This creates opportunities for new players in the market, through reduction of output LC filter size and reduction of power losses. In battery powered applications, near idle power loss is of particular interest, since the audio PA will typically run almost idle.
2016 IEEE International Solid State Circuits Conference (ISSCC)