A driver apparatus and method for driving a voltage driven type switching
element that discharge an electrical charge stored at the gate terminal
of the voltage driven type switching element at a discharge rate. The
discharge rate is controlled so that the change rate over time of the
voltage between the collector and emitter terminals of the voltage driven
type switching element is limited to a second change rate during the
turn-off operation. The starting time of the control of the change rate
over time to attain the second change rate is delayed for a predetermined
delay time after start of the turn-off operation and before a time when
the voltage between the collector and emitter terminals first reaches the
power source voltage level. During the delay time, the discharge rate is
initially at a first change rate higher than the second change rate.