Light load regulator for isolated flyback converter

Details Light load regulator for isolated flyback converter Light load regulator for isolated flyback converter

2006-08-03

2008-12-30

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S097000

Reexamination Certificate

active

07471522

ABSTRACT:
A regulator may include a load voltage sensing circuit configured to generate a feedback signal representative of output voltage from an isolated flyback converter. The regulator may include a pulse generator configured to controllably generate the pulses and to increase at least one off time and at least one period of the pulses after a load on the flyback converter decreases.

REFERENCES:
patent: 6434021 (2002-08-01), Collmeyer et al.
patent: 7352595 (2008-04-01), Yang et al.
patent: 2006/0158909 (2006-07-01), Hawley
patent: 2008/0031018 (2008-02-01), Negrete
“1-Cell to 3-Cell, High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter,” Maxim Integrated Products, 19-1336, Rev. 2; Nov. 1998, p. 1.
“800-mA Synchronous Step-Down Converter,” Texas Instruments Incorporated, SLVS432D, Sep. 2002—Revised Oct. 2003.
“High-integrated Green-mode PWM Controller,” System General Corp, SG6841, Version 1.9, Apr. 6, 2004, p. 1.
“Reducing standby power consumption,” Tso-Min Chen, System General Corp. (3 pages), no date.
Co-pending U.S. Appl. No. 11/499,726, filed Aug. 7, 2006.

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