Overcurrent

Quantum mechanics

Voltage

Engineering

Operational amplifier

High impedance

Power (physics)

Amplifier

Computer science

Current limiting

Electrical impedance

Mechanical engineering

Transistor

Physics

Audio power amplifier

Electronic engineering

Current sense amplifier

Limiting

CMOS

Electrical engineering

IEEE Journal of Solid-State Circuits

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.

Integrated overcurrent protection system for class-D audio power amplifiers