Integrated overcurrent protection system for class-D audio power amplifiers

被引：24

作者：

Berkhout, M ^{[1
]}

机构：

[1] Philips Semicond Nijmegen, NL-6534 AE Nijmegen, Netherlands

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2005年 / 40卷 / 11期

关键词：

audio amplifiers; current limiters; power FET amplifiers; pulse width modulation; switching amplifiers;

D O I：

10.1109/JSSC.2005.857369

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

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.

引用

页码：2237 / 2245

页数：9

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