Hitachi IGBT Module Application Manual
Gate Driving Considerations
5.3.1 Gate Current and Gate Electric Charge
Figure 25 shows the waveform of current and voltage during IGBT module operation.
Figure 25. Example of IGBT switching waveform
During turn-ON and turn-OFF, the gate current necessary to charge and discharge input capacitance
( C
) 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.
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