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Electro-thermal instability in multi-cellular Trench-IGBTs in avalanche condition: Experiments and simulations

This paper reports on the results of a study on electro-thermal instability induced in multi-cellular Trench-IGBTs in avalanche condition. Experimental measurements, made on T-IGBTs, show possible inhomogeneous current distribution under Unclamped Inductive Switching (UIS) confirmed by transient inf...

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Bibliographic Details
Main Authors: Riccio, M., Irace, A., Breglio, G., Spirito, P., Napoli, E., Mizuno, Y.
Format: Conference Proceeding
Language:English
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Summary:This paper reports on the results of a study on electro-thermal instability induced in multi-cellular Trench-IGBTs in avalanche condition. Experimental measurements, made on T-IGBTs, show possible inhomogeneous current distribution under Unclamped Inductive Switching (UIS) confirmed by transient infrared thermography measurements. Together with this, an analytical modeling of avalanche behavior has been included in a compact electro-thermal simulator to study the interaction between a large numbers of elementary cells of T-IGBTs forced in avalanche condition. Electro-thermal simulations qualitatively replicate the possible inhomogeneous operation observed experimentally. Finally a possible theoretical interpretation of the instability in avalanche condition for T-IGBT is given.
ISSN:1063-6854
1946-0201
DOI:10.1109/ISPSD.2011.5890806