Power supply capable of protecting electric device circuit

Details Power supply capable of protecting electric device circuit Power supply capable of protecting electric device circuit

2005-12-13

2005-12-13

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S056030, C363S056050, C363S056100

Reexamination Certificate

active

06975523

ABSTRACT:
A power supply protecting the electric device circuit when over-voltage is applied, is provided. The power supply has a rectifying unit rectifying AC power externally supplied, into first and second DC power and outputting the first and the second DC power; a main power supply transformer boosting the first DC power and supplying the boosted first DC power to the electric device circuit; a switching controlling unit driven by the second DC power, performing the operation on the main power supply transformer that causes the first DC power to be boosted when the second DC power is received; and a controlling unit determining whether the second DC power is to be supplied to the switching controlling unit, wherein the controlling unit senses the voltage supplied to the electric device circuit and interrupts supplying the second DC power to the switching controlling unit if the sensed voltage exceeds a given value.

REFERENCES:
patent: 5956240 (1999-09-01), Williams
patent: 6181101 (2001-01-01), Arai et al.
patent: 6657841 (2003-12-01), Melchert et al.
patent: 6775164 (2004-08-01), Wong et al.

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