Semiconductor integrated circuit device with overheating protect

Details Semiconductor integrated circuit device with overheating protect Semiconductor integrated circuit device with overheating protect

1997-07-23

1999-02-09

Elms, Richard T.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361115, H02H 500

Patent

active

058702679

ABSTRACT:
A plurality of LSI circuits including image processing LSI circuits operable in synchronism with a control clock signal from a clock generator are mounted on a graphic board. Temperature sensors are associated with those of the LSI circuits which give off a larger amount of heat than the other LSI circuits. Detected temperature signals from the temperature sensors are supplied to a temperature monitoring microcomputer, which determine respective temperatures of the corresponding LSI circuits based on the supplied detected temperature signals. The temperature monitoring microcomputer determines whether a highest one of the determined temperatures is higher than a first threshold value and a second threshold value which is greater than the first threshold value. If the temperature is higher than the first threshold value and lower than the second threshold value, then the temperature monitoring microcomputer issues a warning signal to a main CPU to suppress overheating of the LSI circuits. If the temperature is higher than the second threshold value, then the temperature monitoring microcomputer issues a clock disable signal to disable the clock generator.

REFERENCES:
patent: 5451892 (1995-09-01), Bailey
patent: 5557551 (1996-09-01), Craft

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