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Integrated overcurrent protection system for class-D audio power amplifiers

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1 Author(s)
Berkhout, M. ; Philips Semicond. Nijmegen, Netherlands

A fully integrated overcurrent protection system is presented suitable for application in integrated class-D audio power amplifiers. Accurate overcurrent detection is used based on parallel measurement of the voltage drop across the DMOS power transistors. A logic circuit enables continuous current limiting during overload situations. Actual short circuits can be distinguished from load impedance minima using a simple short-circuit discrimination method.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:40 ,  Issue: 11 )