Smart electronic switch

A circuit comprising:

• a monitor circuit configured to receive a current sense signal and to provide a protection signal, wherein the monitor circuit comprises:
• a nonlinear functional unit configured to receive the current sense signal and to generate a power signal representing the power of the current sense signal;
• a first filter configured to receive the power signal and to generate a first filtered signal, and
• a second filter configured to receive an input signal that depends on the current sense signal and to generate a second filtered signal;
• and
• a comparator circuit configured to receive the first filtered signal and the second filtered signal and to compare the first filtered signal with a first threshold value and the second filtered signal with a second threshold value;
• the protection signal being indicative of whether the first filtered signal exceeds the first threshold value or the second filtered signal exceeds the second threshold value.