Power supply device

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor

Reexamination Certificate

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Details

C361S018000

Reexamination Certificate

active

11134334

ABSTRACT:
A power supply device has a pulse width control circuit for controlling voltage converting operation of a voltage converting circuit by changing a pulse width. A momentary interruption detecting circuit detects a change in an output voltage when the output voltage suffers a momentary interruption over a short period of time. A full short-circuit detecting circuit detects a change in the output voltage when the output voltage suffers a short circuit over a very short period of time. A short-circuit control circuit stops a pulse width changing control process of the pulse width control circuit a predetermined period of time after the momentary interruption detecting circuit has detected that the output voltage suffers a momentary interruption, and stops the pulse width changing control process of the pulse width control circuit immediately when the full short-circuit detecting circuit detects that the output voltage suffers a short circuit.

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EPO Search Report mailed Sep. 30, 2005.
Japanese Office Action; Application No. 2004-162038; Dated: Feb. 20, 2007.

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