| 摘要 |
PROBLEM TO BE SOLVED: To provide an overtemperature detecting circuit and an overtemperature protection circuit capable of preventing a chip from being damaged due to overtemperature by properly detecting overtemperature at the center of the chip. SOLUTION: The overtemperature detecting circuit 10 comprises a diode 11 for detecting the temperature of the semiconductor chip 23; and a threshold set circuit for setting a determination temperature threshold value of the overtemperature requiring the measure for protection of the semiconductor chip 23 in response to the change rate of the chip temperature revealed by the diode 11 by detecting the change rate. The temperature detected by the diode 11 and the determination temperature threshold value set by the threshold value set circuit are compared with each other. When the temperature detected by the diode 11 is above the determination temperature threshold value set by the threshold value set circuit, the temperature of the semiconductor chip 23 is detected to be overtemperature. COPYRIGHT: (C)2006,JPO&NCIPI |
