Gate driver and power converter

A power converter comprising:

• a plurality of switching elements that are connected in series between a high power supply potential part and a low power supply potential part;
• a plurality of gate drives provided for the plurality of respective switching elements and each of which is configured to drive a gate of a corresponding one switching element of the plurality of switching elements;
• and
• a power supply voltage detection circuit configured to detect a power supply voltage between the high power supply potential part and the low power supply potential part;
• each of the plurality of gate drives includes:
• a drive circuit configured to drive, in accordance with an input signal that commands to turn on/off the corresponding one switching element, the gate of the corresponding one switching element;
• a time storage circuit configured to store a time length from when the input signal is switched to an on command to when a recovery surge voltage that is generated by a diode that is opposite to the corresponding one switching element is detected;
• a switching determination circuit configured to determine, in accordance with the power supply voltage detected by the power supply voltage detection circuit, whether or not to switch a gate driving condition of the corresponding one switching element;
• and
• a driving condition change circuit configured to change, in accordance with a determination result of the switching determination circuit, the gate driving condition at a time of current turn-on by a time length that is the same as the time length stored at a time of previous turn-on in the time storage circuit.