Semiconductor device having overcurrent protection function and data setting method thereof

摘要

In a driving device ( 20 ) for driving an IGBT ( 1 ), a current measuring portion ( 22 ) measures a main current amount flowing through the IGBT ( 1 ). When the main current amount measured by the current measuring portion ( 22 ) reaches a predetermined reference level, a protection circuit portion ( 23 ) limits the main current at the IGBT ( 1 ) to protect it. A temperature measuring portion ( 24 ) measures the temperature of the IGBT ( 1 ). The control portion ( 25 ) adjusts the aforementioned reference level based on the temperature of the IGBT ( 1 ) measured by the temperature measuring portion ( 24 ). A control portion ( 35 ) stores setting values of the reference level as data.