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:
Jan. 18, 2011
Filed:
Aug. 25, 2008
Applicants:
Masami Aiura, Sendai, JP;
Kanji Egawa, Sendai, JP;
Inventors:
Masami Aiura, Sendai, JP;
Kanji Egawa, Sendai, JP;
Assignee:
Freescale Semiconductor, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and circuit for accurately detecting an output short circuit in a switching regulator. A first transistor and a second transistor are connected in series and driven in a complementary manner. A comparator compares output current, which is generated when the first and second transistors are driven, with a short circuit detection threshold to generate a first short circuit detection signal. A timing controller retrieves the first short circuit detection signal generated by the comparator at a predetermined time to generate a second short circuit detection signal.