Electronic circuitry, power converter, and driving method

A power converter comprising:

• a half-bridge circuit including two switching elements;
• and
• two drive circuits configured to drive the two switching elements, respectively, in accordance with control signals instructing turn-on or turn-off,
• wherein each of the two drive circuits includes:
• a detection circuit configured to detect a physical quantity corresponding to a temporal change of an output current or an output voltage of the switching element controlled by the drive circuit;
• a controller configured to switch a current value commanding a magnitude of a drive current to be supplied to the switching element at a transition timing corresponding to the detected physical quantity;
• a current supply circuit configured to supply the drive current to the switching element based on the current value before switching and the current value after switching;
• and
• a calculation circuit configured to calculate a slew rate of the output voltage or the output current of the switching element in a period before the switching or a period after the switching,
• wherein the controller is configured to determine the current value before switching or the current value after switching to be used during next or subsequent turn-on or turn-off of the switching element in accordance with the calculated slew rate.

A driving method comprising:

• detecting a physical quantity corresponding to a temporal change of an output current or an output voltage of a switching element whose drive is controlled in accordance with a control signal instructing turn-on or turn-off;
• switching a current value commanding a magnitude of a drive current to be supplied to the switching element at a transition timing corresponding to the detected physical quantity;
• supplying the drive current to the switching element based on the current value before switching and the current value after switching;
• calculating a slew rate of the output voltage or the output current of the switching element in a period before the switching or a period after the switching;
• and
• determining the current value before switching or the current value after switching to be used during next or subsequent turn-on or turn-off of the switching element in accordance with the calculated slew rate.