A power circuit has a power switching device (PSD) to, when in an ON state, conduct current from its first to second terminal; a diode anti-parallel to the PSD that, when in a non-blocking state, conducts current from its anode to its cathode; a drive input line coupled to a device control terminal of the PSD to control its switching; and sense circuitry, having a temperature sensitive current source (TSCS) coupled to a conduction terminal, providing a sense signal from the TSCS to the drive input line to indicate temperature. The TSCS is thermally coupled to the PSD, the temperature indicated is of the PSD, and the conduction terminal is the first or second terminal of the PSD; and/or the TSCS is thermally coupled to the diode, the temperature indicated by the sense signal is of the diode, and the conduction terminal is the anode or cathode of the diode.