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Overcurrent Detection Circuit for Integrated Class-D Amplifiers

Cadete, F.C. ; Guilherme, DG ; Guilherme, J.G. ; Horta, N. ; Cadete, F.C.

Overcurrent Detection Circuit for Integrated Class-D Amplifiers, Proc European Conf. on Circuit Theory and Design, Linköping, Sweden, Vol. 1, pp. 410 - 413, September, 2011.

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Abstract
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.