Overheat protection circuit

Details Overheat protection circuit Overheat protection circuit

2011-06-21

2011-06-21

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

C361S093800

Reexamination Certificate

active

07965475

ABSTRACT:
An overheat protection circuit of a semiconductor apparatus has an output current detecting circuit for detecting an output current of a constant voltage circuit; a temperature detector for detecting a temperature of the apparatus; an output current control circuit for controlling the output current in accordance with output of the temperature detector; a bias current source for providing a bias current for the temperature detector; and a switch for controlling the bias current from the bias current source to the temperature detector. The output current control circuit interrupts the output current when the temperature detector detects a temperature that is higher than a predetermined temperature. The output current detecting circuit and the output current control circuit may be used to control the switch to prevent oscillation of the output current in the vicinity of the predetermined temperature.

REFERENCES:
patent: 6538867 (2003-03-01), Goodell et al.
patent: 2002/0149350 (2002-10-01), Koyasu
patent: 2004/0075423 (2004-04-01), Itabashi et al.
patent: 2002-312044 (2002-10-01), None
patent: 2005-175439 (2005-06-01), None

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