Method and device for controlling the switching of the final stage of a driver of an electromagnetic load, particularly for warm water control units in motor vehicles

摘要

The end stage switching method uses a voltage switching threshold for operation of the end stage for on and off switching of the electromagnetic load e.g. a hot water control unit in an automobile. The control of the end stage is effected via a pulse width modulated signal, with control of the end stage within a time interval (t1) ahead of the load switching point. The control of the load via the end stage may be effected via a microprocessor control.