Soft-start apparatus for power supplies

Details Soft-start apparatus for power supplies Soft-start apparatus for power supplies

2007-05-15

2007-05-15

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S282000, C323S284000

Reexamination Certificate

active

11224002

ABSTRACT:
A soft-start apparatus for a power supply outputs a compensation signal to a PWM controller as the power supply starts up. Meanwhile, a pulse width of a switching signal outputted from the PWM controller gradually increases from an initial value to a determined value. The pulse width of the switching signal is then timely modulated in response to the load conditions thereat so as to prevent a power switch from over-voltage and over-current damage as the power supply starts up.

REFERENCES:
patent: 4605997 (1986-08-01), Kirk
patent: 6177783 (2001-01-01), Donohue
patent: 6936997 (2005-08-01), Mullett

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