Driving inductive load, especially monostable relay, involves driving with switching voltage generated from supply voltage if power loss exceeds threshold, otherwise with supply voltage

摘要

The method involves detecting the supply voltage, determining the power loss from the supply voltage and load resistance, driving the load with a switching voltage generated from the supply voltage in the event that the determined power loss exceeds a permitted value, otherwise with the supply voltage. AN Independent claim is also included for the following: a circuit for implementing the method and a digital output unit for a memory-programmable controller with an inventive circuit.