A 240W Monolithic Class-D Audio Amplifier Output Stage

Abstract

A single-channel class-D audio amplifier output stage outputs 240W undipped into 4Omega 0.1% open-loop THD+N allows using the device in a fully-digital audio signal path with no feedback. The output current capability is plusmn18A and the part is fabricated in a 0.4μm/1.8μm high-voltage BiCMOS process. Over-current sensing protects the output from short circuits