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Single-winding, multiple-output, bi-directional flyback converter
   
Document Number
US Patent 6549432
Issued Date
April 15, 2003
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Abstract
A multiple-output, bi-directional flyback converter with soft switching of an input switch is disclosed. The primary-side of the converter is comprised of an input power supply, a transformer with a primary winding and a secondary winding, and an input switch with an associated diode, wherein a first end of the primary winding is connected to the input power supply and a second end of the primary winding is connected to the input switch. A first predetermined number of output voltage circuits are connected to a single secondary winding or one of a plurality of secondary windings each producing an output voltage. Each output voltage circuit has an output switch with an associated diode, and a diode connected in series between the output voltage switch and the secondary winding. A last output voltage circuit with a bi-directional switch and associated diode is connected connection to the secondary winding. A control unit controls the switching of the input switch, the predetermined number of output switches and the bi-directional switch, wherein the switching of the bi-directional switch is controlled so as to allow for soft switching of the input switch.
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Number of Claims:
24
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Published
April 15, 2003
Application Number
10/086,028
Filed
February 28, 2002
US Classification
363/21.14  
Int'l Classification
H02M   3/335   (20060101)   H02M   3/24   (20060101)  
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USPTO Field of Search
363/21.14  
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