Discussion
Soft turn-off is used when clearing a short circuit in order to
Answer: D
Correct answer: limit the overvoltage from the circuit inductance
Interrupting a short circuit current abruptly generates a voltage across the stray inductance proportional to the rate of change, and at short circuit currents that voltage would exceed the device rating. Soft turn-off reduces the gate drive so that the current falls more slowly, keeping the overvoltage within what the device can block.
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