Abstract
Clamped inductive switching performance of insulated gate bipolar transistors (IGBTs) have been studied in detail with the aid of extensive measurements and numerical simulations. Internal dynamics of a latch-up free punch-through IGBT during clamped inductive switching is studied using two-dimensional (2-D) mixed device and circuit simulations incorporating the self-heating mechanism. Failure of IGBT during inductive load turn-off is shown to occur due to thermally assisted carrier multiplication at the reverse biased p-base n-drift region junction under the emitter contact.
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