3.8 Proceedings Paper

Electro-thermal Simulation of 1200 V 4H-SiC MOSFET Short-Circuit SOA

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IEEE

Keywords

electro-thermal simulation; model validation; MOSFET; short-circuit; silicon carbide; SOA

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The purpose of this paper is to introduce a dynamic electro-thermal simulation and analysis approach for device design and short-circuit safe-operating-area (SOA) characterization using a physics-based electro-thermal Saber (R)* model. Model parameter extraction, simulation, and validation results are given for several commercially available 4H-silicon carbide (SiC) power MOSFETs with a voltage rating of 1200 V and with current ratings of 31.6 A and 42 A. The electro-thermal model and simulations are used to analyze the short-circuit SOA including the measured failure time (t(failure)) and simulated device internal junction temperature (T-j) at failure for different gate voltages (V-GS) and drain voltages (V-DS).

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