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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.:

US 8223465 B1

PDFFull Text
Date of Patent:
Jul. 17, 2012

Filed:

Oct. 28, 2009

Surge current detection in a switch by detecting change in a duty cycle

Applicant:

Tom C. Truong, Lewisville, TX (US);

Inventor:

Tom C. Truong, Lewisville, TX (US);

Assignee:

Texas Instruments Incorporated, Dallas, TX (US);

Attorneys:

William B. Kempler

Wade J. Brady, III

Frederick J. Telecky, Jr.

Primary Examiner:

Jared Fureman

Assistant Examiner:

Scott Bauer

Int. Cl.
CPC ...
H02H 7/00 (2006.01); H02H 9/02 (2006.01); H02H 7/10 (2006.01); H02H 7/122 (2006.01);
U.S. Cl.
CPC ...
Abstract

An embodiment of the invention provides a surge current protection circuit. The surge current protection circuit comprises a peak current detector and a current sensing device. When the peak current detector detects when a surge current has occurred, by monitoring a change in duty cycle on a node of a HS (high side) switch, a LS (low side) switch is activated. The current sensing device senses the current drawn through the LS switch. When the current sensing device senses a current that exceeds a current limit, the HS switch is turned off for a period of time such that the surge current is reduced.

Find Patent Forward Citations

Truong, Tom. (2012). Surge current detection in a switch by detecting change in a duty cycle (U.S. Patent No. 8223465). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8223465

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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