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:
Apr. 15, 2008
Filed:
Jul. 13, 2006
Applicant:
Jun Honda, El Segundo, CA (US);
Inventor:
Jun Honda, El Segundo, CA (US);
Assignee:
International Rectifier Corporation, El Segundo, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 5/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of protecting a MOSFET switch from overheating. The method is achieved by determining a ratio of ON resistance of the switch to resistance of a sense resistor, the sense resistor being series coupled in the source-drain circuit of the switch. Further, the ratio is compared to a reference signal and an output signal is generated when the ratio exceeds the reference signal.