Method for driving a power semiconductor

摘要

The integrated gate dual transistor (IGDT) has two controllable gates (G1, G2), a first gate (G1) being provided on the cathode side and being driven via a low-inductance first gate terminal with a first gate current, and a second gate (G2) being provided on the anode side and being driven via a low-inductance second gate terminal with a second gate current. In the switch-off operation of the IGDT, the rate of rise of the voltage across the IGDT is limited via the two gates. Limiting the rate of rise of the voltage across the IGDT prevents voltages from building up at different speeds in a series circuit of IGDTs, and thus unequal loads from overheating and destroying the individual IGDTs.