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:
Dec. 16, 2014
Filed:
Nov. 04, 2011
Applicants:
Charles Cai, San Jose, CA (US);
Jeff Kotowski, Nevada City, CA (US);
Kien Vi, San Jose, CA (US);
Inventors:
Assignee:
Atmel Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/563 (2006.01); H02M 3/158 (2006.01); H05B 37/02 (2006.01); H02M 3/156 (2006.01);
U.S. Cl.
CPC ...
H02M 3/158 (2013.01); Y02B 20/42 (2013.01); H05B 37/02 (2013.01); H02M 3/156 (2013.01); Y10S 323/901 (2013.01);
Abstract
A power conversion circuit of two feedback loops is disclosed that includes a feedback control circuit for ramping up or down a commanded voltage to a load (e.g., LEDs). The second feedback loop feeds into the first feedback loop, and the second feedback loop operates at a slower bandwidth than the first feedback loop. When ramping up or down the commanded voltage, a voltage overshoot results because of delay in the system. The overshoot can be compensated for by a final adjustment to the commanded voltage.