BOOTSTRAP COMPENSATION CIRCUIT AND POWER MODULE

摘要

A bootstrap compensation circuit includes: a plurality of resistors series-connected between a floating potential corresponding to a high-voltage-side potential and a reference potential; a second capacitor that has one end connected to a divided potential extraction point and has the other end connected to the reference potential, the divided potential extraction point located between the plurality of resistors; and an output circuit which supplies current to a first capacitor, according to a potential of the divided potential extraction point.

主权项

1. A bootstrap compensation circuit which supplies current to a bootstrap circuit including a first capacitor connected between a reference potential, which is a connection point between a high-side switching element and a low-side switching element, and a high-side control circuit so as to supply voltage to the high-side control circuit of the high-side control circuit and a low-side control circuit which control driving of the high-side switching element and the low-side switching element, respectively, where the switching elements are totem-pole connected, in order from a high voltage side, between a high-voltage-side potential and a low-voltage-side potential, said bootstrap compensation circuit comprising:
a plurality of resistors series-connected between a floating potential corresponding to said high-voltage-side potential and said reference potential; a second capacitor one end of which is connected to a divided potential extraction point and the other end of which is connected to said reference potential, the divided potential extraction point being a point between said plurality of resistors; and an output circuit which supplies current to said first capacitor, based on a potential of said divided potential extraction point.