600 V, 90 A — the power-stage workhorse
The Infineon IGP50N60T is a TRENCHSTOP™ Trench Field Stop IGBT rated for 600 V collector-emitter breakdown and 90 A continuous collector current, with a pulsed current capability of 150 A.
Conduction and switching losses — the thermal budget drivers
At a test condition of 400 V, 50 A, 7 Ω gate resistor, and 15 V gate drive, the typical Vce(on) is 2 V — this defines the conduction loss floor at full load. Switching energy is 1.2 mJ (turn-on) and 1.4 mJ (turn-off), which together with the 333 W maximum power dissipation sets the heatsink requirement for the target switching frequency. Gate charge totals 310 nC, so the gate driver must supply enough peak current to charge and discharge the gate within the desired dead-time window. Turn-on delay is 26 ns and turn-off delay is 299 ns at 25°C, giving a usable switching window for PFC, welding inverters, and motor-drive stages up to the 30–40 kHz range before dead-time margins shrink.