Over-voltage protection circuit and method therefor

Details Over-voltage protection circuit and method therefor Over-voltage protection circuit and method therefor

2006-01-17

2006-01-17

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S224000

Reexamination Certificate

active

06987378

ABSTRACT:
In one embodiment, an over-voltage protection circuit of a power supply system disables an upper power transistor of an output stage of the power supply system responsively to an over-voltage condition on an output voltage of the power supply system. Subsequently, the over-voltage protection circuit alternately enables and disables a lower power transistor of the output stage responsively to respective first and second value of the output voltage.

REFERENCES:
patent: 5359280 (1994-10-01), Canter et al.
patent: 5359281 (1994-10-01), Barrow et al.
patent: 5818707 (1998-10-01), Seong et al.
patent: 6686725 (2004-02-01), Choi et al.
patent: 6756771 (2004-06-01), Ball et al.
patent: 6936997 (2005-08-01), Mullett
Maxim, High—Efficiency,Quad Output, Main Power-Supply Controllers for Notebook Computers, Maxim Integrated Products, Data Sheet 19-2187, Rev. 0; Apr. 2002.

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