Method for starting a voltage-mode switching power supply...

Details Method for starting a voltage-mode switching power supply... Method for starting a voltage-mode switching power supply...

2007-05-08

2007-05-08

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S299000, C323S901000

Reexamination Certificate

active

11035908

ABSTRACT:
A method for starting up a voltage-mode switching power supply into a biased load includes computing a ratio of the load voltage at the biased load to an input voltage of the switching power supply, generating a first signal indicative of the duty cycle of the voltage-mode switching power supply, comparing the first signal indicative of the duty cycle to the ratio, and turning on an output stage of the voltage-mode switching power supply only when the first signal indicative of the duty cycle is equal to the ratio. In this manner, the voltage-mode switching power supply can be started up to supply power to a biased load without dragging down the load voltage of the biased load.

REFERENCES:
patent: 4823070 (1989-04-01), Nelson
patent: 4967138 (1990-10-01), Obergfell et al.
patent: 6370045 (2002-04-01), Lurkens
patent: 6593725 (2003-07-01), Gallagher et al.
patent: 6954054 (2005-10-01), Brown
patent: 7012413 (2006-03-01), Ye
patent: 7095215 (2006-08-01), Liu et al.

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