The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2012
Filed:
Feb. 13, 2009
Byoung Woo Ryu, Suwon-si, KR;
Gun Woo Moon, Daejeon-si, KR;
Seong Wook Choi, Daejeon-si, KR;
Byoung Hee Lee, Daegu-si, KR;
Dong Seong OH, Incheon-si, KR;
Byoung Woo Ryu, Suwon-si, KR;
Gun Woo Moon, Daejeon-si, KR;
Seong Wook Choi, Daejeon-si, KR;
Byoung Hee Lee, Daegu-si, KR;
Dong Seong Oh, Incheon-si, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-do, KR;
Abstract
A switching mode power supply includes an EMI filter unit, a PFC unit, a DC/DC unit, a PFC controller including a feedback stage to which a link voltage at an output side of the PFC unit is fed back and an overvoltage protection stage, a DC/DC controller generating a burst mode operation signal in a light-load or no-load condition, an error signal generation unit for sensing an output voltage of the power supply to generate an error signal, and a control unit for enabling the PFC unit to operate in a burst mode by connecting the overvoltage protection stage and the feedback stage. When the error signal is smaller than a predetermined value, the DC/DC controller generates the burst mode operation signal. When the link voltage fed back to the feedback stage exceeds a threshold voltage of the overvoltage protection stage, the PFC controller deactivates the PFC unit.