Driving Circuit For Semiconductor Element

Abstract: Driving circuits (50a, 50b) each comprise a control unit (4a, 4b) that controls one semiconductor element of semiconductor elements (5a, 5b) of upper and lower arms which are connected in series, and that applies a gate voltage to the semiconductor element (5a, 5b) to drive the semiconductor element (5a, 5b). The driving circuits (50a, 50b) detect a short circuit of the semiconductor elements (5a, 5b) of the upper and lower arms on the basis of a main terminal voltage of the semiconductor elements (5a, 5b). The control units (4a, 4b) each perform control to temporarily raise the gate voltage applied to the semiconductor element (5a or 5b) to a first voltage which is higher than a prescribed voltage when the semiconductor element (5a or 5b) of an arm to be driven is turned on. The control unit (4a or 4b) that controls the driving of the arm which differs from the arm to be driven detects a short circuit of the semiconductor elements (5a, 5b) of the upper and lower arms on the basis of the main terminal voltage.

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