Electronic switching and protection circuit

摘要

An example of an electronic circuit includes an electronic switch having a load path, a first protection circuit configured to generate a first protection signal based on a current-time characteristic of a load current through the load path of the electronic switch, and a drive circuit. which is adapted to drive the electronic switch based on the first protection signal. The first protection circuit includes an analog-to-digital converter (ADC) configured to receive an ADC input signal representing the load current, sampling the ADC input signal once each of a plurality of consecutive sampling periods, and outputting an ADC output signal comprising a series of values such that each of these values represents a respective sample of the ADC input signal. The ADC is configured to pseudorandomly select a sampling instant in each sampling period.