SWITCHING CONTROL CIRCUIT HAVING OFF-TIME MODULATION TO IMPROVE EFFICIENCY OF PRIMARY-SIDE CONTROLLED POWER SUPPLY - Patent 1935083

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EP 1 935 083 A1

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(43)	Date of publication:
	25.06.2008 Bulletin 2008/26

(21)	Application number: 05806188.8

(22)	Date of filing: 09.10.2005

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International Patent Classification (IPC):

H02M 3/22^(2006.01)

(86)	International application number:
	PCT/CN2005/001653

(87)	International publication number:
	WO 2007/041895 (19.04.2007 Gazette 2007/16)

(84)	Designated Contracting States:
	DE NL

(71)	Applicant: System General Corp.
	Taipei Hsien 231 (TW)

(72)	Inventors:
	YANG, Ta-yung Taiwan 330 (TW) HUNG, Guo-kiang Taiwan 231 (TW) LIN, Jenn-yu, G. Taiwan 231 (TW) LI, Chuh-ching Taiwan 320 (TW) TSAO, Fengcheng Pingtung County (TW)

(74)	Representative: Chamberlain, Alan James
	Haseltine Lake Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)

(54)	SWITCHING CONTROL CIRCUIT HAVING OFF-TIME MODULATION TO IMPROVE EFFICIENCY OF PRIMARY-SIDE CONTROLLED POWER SUPPLY