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:
May. 19, 2015
Filed:
May. 03, 2013
Applicant:
Fairchild Korea Semiconductor Ltd., Bucheon, KR;
Inventors:
Min-Woo Lee, Bucheon-si, KR;
Kyung-Oun Jang, Bucheon-si, KR;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/00 (2006.01); H03K 5/00 (2006.01); H02M 3/156 (2006.01); H03K 17/082 (2006.01); H02M 1/32 (2007.01); H02M 1/00 (2006.01); G01R 31/02 (2006.01);
U.S. Cl.
CPC ...
H03K 5/00006 (2013.01); H02M 3/156 (2013.01); H03K 17/0822 (2013.01); H02M 1/32 (2013.01); H02M 2001/0009 (2013.01); G01R 31/025 (2013.01); H03K 2217/0027 (2013.01);
Abstract
The present invention relates to a switch controller, a switch control method, and a power supply using the switch controller. A switch controller controls switching operation of a power switch and receives a sense voltage of a sense resistor to which a drain current flowing in the power switch flows. The switch controller generates a sum signal using the sense voltage and a ramp signal having a cycle that is the same as a switching cycle of the power switch. The switch controller determines short-circuit of the sense resistor by detecting slope variation of the sum signal.