Gate driver circuit, three-phase gate driver, and switching circuit

Abstract

A gate driver circuit includes: a high-side driver that drives a high-side transistor; a charge pump line to which a charge pump voltage higher than an input voltage of the high-side transistor and generated by a charge pump circuit is supplied; a current source circuit that is structured to be able to supply a constant current from the charge pump line to a bootstrap capacitor for driving the high-side transistor; and a current control circuit that controls on/off of supply of the constant current to the bootstrap capacitor by the current source circuit. The charge pump circuit may not have an output capacitor.

Dependencies are inferred from the claim text.