Regulator protection circuit and power supply apparatus...

Details Regulator protection circuit and power supply apparatus... Regulator protection circuit and power supply apparatus...

2006-09-19

2006-09-19

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

C361S091100, C361S100000, C361S103000, C340S660000, C340S661000, C340S662000, C340S663000, C340S584000

Reexamination Certificate

active

07110226

ABSTRACT:
A power supply apparatus has a regulator and a regulator protection circuit. On detecting an abnormality, an abnormality detection circuit in the regulator protection circuit turns the regulator off. Based on the output of the abnormality detection circuit, an abnormality detection incidence checking circuit in the regulator protection circuit checks whether or not an abnormality has been detected a predetermined number of times within a predetermined length of time. When the abnormality detection incidence checking circuit recognizes that an abnormality has been detected the predetermined number of times within the predetermined length of time, an abnormality detection level setting circuit in the regulator protection circuit decreases the detection level of the abnormality detection circuit. This helps reduce the incidence of malfunctioning of the load to which the regulator feeds its output due to repeated detection of an abnormality and recovery therefrom.

REFERENCES:
patent: 5166854 (1992-11-01), Morishige
patent: 5255149 (1993-10-01), Matsuo
patent: 5437002 (1995-07-01), Bennett
patent: 9-191647 (1997-07-01), None
patent: 2002-145022 (2002-05-01), None
patent: 2003-33015 (2003-01-01), None

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