Semiconductor Element Driving Circuit And Power Conversion Device

Abstract: A driving circuit (100) comprises: a gate driving circuit (2) that individually drives one of two semiconductor elements (5a, 5b) connected in series; and a short circuit detection circuit (3) that detects an arm short circuit of the semiconductor elements (5a, 5b). The short circuit detection circuit (3) is provided with a voltage application circuit (34A) to which a main terminal voltage is applied, and a short circuit determination circuit (31) which determines whether or not there is an arm short circuit. The voltage application circuit (34A) is provided with a first resistor (50) that comprises a plurality of resistance elements, a first capacitor (51) that comprises a plurality of capacitance elements (55) which are respectively connected in parallel with the resistance elements of the first resistor (50), and a second capacitor (52) that comprises a plurality of capacitance elements (56) which are connected in series. The second capacitor (52) is disposed closer than the first capacitor (51) to a bus bar (7), which is a noise source.

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