| 摘要 |
PROBLEM TO BE SOLVED: To provide a power semiconductor device capable of preventing erroneous determination that an excess current flows although a main current is within a normal current value range. SOLUTION: The power semiconductor device includes a power semiconductor switching element, a control resistor, a drive circuit, a control voltage determination part for determining whether a difference in voltage across the control resistor is smaller than a predetermined voltage difference, and a sensing current determination part for determining whether a sensing current exceeds a predetermined current value. The drive circuit stops the input of a control signal to a control terminal when the difference between first and second voltages is smaller than a predetermined voltage difference, and in addition the sensing current exceeds the predetermined current value. COPYRIGHT: (C)2006,JPO&NCIPI |
