| 摘要 |
PROBLEM TO BE SOLVED: To reliably prevent abnormal heat generation of a switching element.SOLUTION: When a layer short circuit (interlayer short circuit) current appears in a FET 11 and a first cutoff function section 12a detects the layer short circuit (interlayer short circuit) current, a cutoff function section 12 does not cut off power supply from a power supply to a load resistance 22 if a temperature of the FET 11 detected by a second cutoff function section 12b does not exceed a predetermined value, but cuts off power supply from the power supply to the load resistance 22 at an input to the FET 11 if the temperature of the FET 11 detected by the second cutoff function section 12b exceeds the predetermined value. |
