This should be determined according to the model of IGBT (the greater the voltage and current resistance, the greater the equivalent capacitance between the G and C poles of IGBT, the greater the required current), and the switching frequency is also related (the greater the switching frequency, the greater the required current), the general drive current is A few tenths of A to a few A (5A below), the drive circuit can not be too large, Otherwise, it will cause interference of IGBT drive signal, leading to misleading.