PROTECTION CIRCUIT FOR PROTECTING A HALF-BRIDGE CIRCUIT

摘要

The present invention relates to a protection circuit for protecting a half-bridge circuit. The protection circuit detects an incorrect response of the half-bridge by monitoring the current of a first switch at a series resistor of a second switch. The protection circuit has a detector for detecting the voltage across the resistor and an evaluation circuit which is designed in such a manner that it evaluates an output signal from the detector after the first switch has been switched on and provides a fault signal at an output when the voltage across the resistor is greater than the threshold voltage.

主权项

1. A method, comprising:
periodically alternately switching first and second switches for a switched-on duration; and counting periodically recurring intervals of time during which a voltage across a resistor exceeds a threshold value at least once.