US 7,586,769 B2
	Power converters having balanced power rail currents
Khanderao Madav Gaikwad, Manila (Philippines); Palanivel Selvaraju, Manila (Philippines); and Wilson Palaypayon, Laguna (Philippines)
Assigned to Astec International Limited, Kwun Tong, Kowloon (Hong Kong Special Administrative Region of the People's Republic of China, The)
Filed on May 12, 2006, as Appl. No. 11/433,836.
Prior Publication US 2007/0262752 A1, Nov. 15, 2007
Int. Cl. H02M 7/757 (2006.01); H02M 5/42 (2006.01)

U.S. Cl. 363—81  [363/89]

26 Claims

1. A power factor correction (PFC) circuit for a power converter, the PFC circuit comprising at least one output terminal, a split boost choke having at least two windings, at least two boost diodes, at least two power rails, each power rail connected to said output terminal and including one of said windings and one of said boost diodes, and a current balancing circuit coupled between the power rails.