Hitachi IGBT Module Application Manual
5.3
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
( C
ies
) and reverse transfer capacitance ( C
res
) 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.
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