| 摘要 |
PROBLEM TO BE SOLVED: To provide a versatile semiconductor device that detects a temperature of a switching element without increasing the number of pads formed on a semiconductor chip, and can be applied to an insulating gate type switching element. SOLUTION: The semiconductor device includes: a main switching element 1; a serial circuit of a current sensing element 2 connected in parallel thereto and a sensing resistor 3; and a reverse recovery time detecting circuit 5 connected to a sensing voltage terminal SE between the current sensing element 2 and the sensing resistor 3. The reverse recovery time detecting circuit 5 detects a reverse recovery current flowing through a parasitic diode of the current sensing element 2 immediately after the main switching element 1 is turned on, and detects the temperature of the main switching element 1 on the basis of the length of the time when the reverse recovery current flows. COPYRIGHT: (C)2011,JPO&INPIT |
