Integrated overcurrent protection system for class-D audio power amplifiers |
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Authors: | Berkhout M. |
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Affiliation: | Philips Semicond. Nijmegen, Netherlands; |
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Abstract: | 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. |
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