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Constant current mode ripple attenuation method in flyback power supply



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Patent 7511973
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Document Number
US Patent 7511973
Issued Date
March 31, 2009
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Inventors
Zheng; Junjie (Santa Clara, CA)
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Abstract
A modification of a control loop of a primary side sensing power control system that uses a different and unique relationship to accomplish the constant current control while attenuating the affects of a ripple voltage.
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Number of Claims:
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Owner
iWatt Inc. (Los Gatos, CA)
Published
March 31, 2009
Application Number
11/856,582
Filed
September 17, 2007
US Classification
363/21.01   363/21.08 363/21.16 363/46
Int'l Classification
H02M   3/335   (20060101)  
Examiner
Attorney/Law Firm
Parent Case
RELATED APPLICATIONS This application claims priority from U.S. provisional application No. 60/845,658 which is incorporated by reference herein in its entirety. This application is related to U.S. application Ser. No. 11/558,326 filed on Nov. 9, 2006 which is incorporated by reference herein in its entirety.
USPTO Field of Search
363/21.01   363/21.02   363/21.08   363/21.09   363/21.12   363/21.16   363/21.17   363/23   363/25   363/39   363/40   363/41   363/42   363/43   363/44   363/45   363/46   363/47   323/283   323/284  
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