Power supply arrangements

Details Power supply arrangements Power supply arrangements

2005-08-02

2005-08-02

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S049000, C323S901000

Reexamination Certificate

active

06924990

ABSTRACT:
A switch mode power supply and its start-up circuit produce a controlled output voltage from an input voltage. A power supply control circuit is powered by the output voltage and is responsive to the output voltage to control the power supply. The control circuit responds to differences between a fraction of the output voltage and a reference voltage to control the start-up circuit. This control is inhibited at low values of the output voltage to ensure that the power supply starts up correctly despite the reference voltage being indefinite or unstable at such low values of the output voltage.

REFERENCES:
patent: 4864485 (1989-09-01), Rilly et al.
patent: 5132890 (1992-07-01), Blandino
patent: 5530398 (1996-06-01), Shamlou et al.
patent: 5610803 (1997-03-01), Malik
patent: 0676857 (1995-10-01), None
patent: 04226602 (1992-08-01), None

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