Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2011-06-14
2011-06-14
Tso, Edward (Department: 2858)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S021160
Reexamination Certificate
active
07961483
ABSTRACT:
A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls an inductor switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp time and stops increasing at the end of the ramp time. The comparing circuit generates a timing signal that indicates a target time at which the inductor current would reach a predetermined current limit if the inductor current continued to increase at the ramp-up rate. The control loop then receives the timing signal and compares the target time to the end of the ramp time. The pulse width of the inductor switch control signal is increased when the target time occurs after the end of the ramp time. Adjusting the pulse width controls the peak of the inductor current.
REFERENCES:
patent: 6134123 (2000-10-01), Yamada
patent: 6304461 (2001-10-01), Walker
patent: 6321531 (2001-11-01), Caren et al.
patent: 6680988 (2004-01-01), Maeda et al.
patent: 6842350 (2005-01-01), Yamada
patent: 6958920 (2005-10-01), Mednik et al.
patent: 6980443 (2005-12-01), Nagano
patent: 7239532 (2007-07-01), Hsu et al.
patent: 7245510 (2007-07-01), Baurle et al.
patent: 7388764 (2008-06-01), Huynh et al.
patent: 7394670 (2008-07-01), Koike
patent: 2002/0067626 (2002-06-01), Koike
patent: 2004/0174722 (2004-09-01), Kunii
patent: 2006/0002155 (2006-01-01), Shteynberg et al.
patent: 2006/0125454 (2006-06-01), Chen et al.
patent: 2006/0198168 (2006-09-01), Fujita et al.
patent: 2006/0291258 (2006-12-01), Zhu et al.
patent: 2007/0121349 (2007-05-01), Mednik et al.
Grant Matthew
Huynh Steven
Kunst David
Tao Zhibo
Active-Semi, Inc.
Imperium Patent Works
Tso Edward
Wallace Darien K.
Williams Arun
LandOfFree
Constant current and voltage controller in a small package... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Constant current and voltage controller in a small package..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constant current and voltage controller in a small package... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2728691