Method and circuit for monitoring the operational status of a charge

摘要

The load is driven by a clocked PWM drive signal. The method involves evaluating the drive signal, which is varied in its pulse width to limit the current flowing through the load, to determine the operating state of the load. The frequency of response of the current limiting is counted over a defined period. An Independent claim is also included for a circuit for clocked driving of a load, especially an electric motor in a motor vehicle.