Switching power-supply circuit and semiconductor integrated...

Details Switching power-supply circuit and semiconductor integrated... Switching power-supply circuit and semiconductor integrated...

2007-06-12

2008-11-18

Tran, Anh Q (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S033000, C326S083000

Reexamination Certificate

active

07453287

ABSTRACT:
A switching power-supply circuit generates a predetermined output voltage by controlling a first switching transistor connected to a power supply and a second switching transistor connected between the first switching transistor and the ground. The switching power supply circuit includes a first driver, a second driver, a soft-start voltage generator and an error amplifier. The first driver drives the first switching transistor. The second driver drives the second switching transistor. The soft-start voltage generator generates a soft-start voltage that increases gradually after the time of start. The error amplifier amplifies an error voltage between a feedback voltage based on the predetermined output voltage and the soft-start voltage, and controls the first and second drivers in accordance with an amplified error voltage.

REFERENCES:
patent: 6091234 (2000-07-01), Kitagawa
patent: 7019507 (2006-03-01), Dittmer et al.
patent: 2005/0264270 (2005-12-01), Saeki et al.
patent: 7-67322 (1995-03-01), None
patent: 10-225105 (1998-08-01), None

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