Compact electro-thermal modeling and simulation of large area multicellular Trench-IGBT

In this contribution we report on electro-thermal modeling and simulation strategy of large area multicellular Trench-IGBT (TIGBT). The proposed solution is based on two coupled systems: a 3D thermal simulator and a 1D electrical (with temperature dependent parameters) physical model of single TIGBT cell. The single cell electrical model has been calibrated to fit the experimental characteristics of a 1200 Volt-1000 Ampere commercial TIGBT and the influence on the breakdown behaviour of the second order effects has also been included. The unit cell model has been inserted in the 3D thermal simulator and the time dependent thermal maps have been obtained. As a final results we will present electro-thermal simulations in short-circuit condition; the latch-up onset of the parasitic thyristor will be analyzed.