Overcurrent detection circuit for integrated class-D amplifiers

This paper presents a new architecture for a overcurrent detection system, dedicated to fully integrated class-D audio amplifiers, that uses half the comparators than conventional architectures. A detailed implementation for a 1-W bridge-tied load (BTL) class-D amplifier, on a 0.18 μm CMOS technology is presented, showing a reduction of 28.8% in current consumption and 23.5% in silicon area, when compared to its equivalent conventional architecture.