Hitachi IGBT Module Application Manual
Gate Driving Considerations
5.3.1 Gate Current and Gate Electric Charge
Figure 25. Example of IGBT switching waveform
During turn-ON and turn-OFF, the gate current necessary to charge and discharge input capacitance
) and reverse transfer capacitance ( C
) flows between gate- and emitter-controlling electrodes.
So, when gate-emitter voltage is applied to establish either positive or negative bias, the product of gate
current and time represents the amount of gate electric charge transferred.