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:
Oct. 18, 2011
Filed:
Aug. 04, 2008
Kwan-il OH, Suwon-si, KR;
Kwan-Il Oh, Suwon-si, KR;
Samsung SDI Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A power supply including a transformer primary coil coupled to an input power source and a secondary coil coupled to an output terminal, a first switch coupled to the primary coil of the transformer, a duty cycle of the first switch controlling a voltage of the output terminal, first and second resistors coupled to the output terminal in series, a third resistor having a first terminal coupled to a node common to the output terminal and the first resistor, a second switch having a first terminal coupled to a second terminal of the third resistor and having a second terminal coupled to a node common to the first and second resistors, the second switch controlled based on an accumulated driving time, and a switching controller configured to receive a feedback voltage varying according to an on/off of the second switch, and configured to control the duty cycle.