1200V FS-IGBT module with enhanced dynamic clamping capability

This paper describes the design concept to realize IGBT modules with large surge capability without any protection, such as gate controlled soft-turn-off and/or gate clamping zeners, especially focused on the large capacity fast switching FS (field-stop) IGBT modules. A 1200 V 450 A trench FS-IGBT module, which is designed to have optimum clamping voltage, has been able to obtain 6 /spl mu/sec-long UIS clamping turn off capability from two times larger current than its rating. Furthermore, the device survived after a 10 /spl mu/sec short-circuit followed by 2.5 /spl mu/sec clamping.

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