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:
Nov. 24, 2015
Filed:
Feb. 12, 2015
Applicant:
Koito Manufacturing Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 33/02 (2006.01); H05B 33/08 (2006.01); H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0815 (2013.01); H05B 33/0827 (2013.01); H05B 37/0209 (2013.01);
Abstract
A current controllercompares a first coil current Iflowing in an output inductor Lwith a first upper threshold value and a first lower threshold value. A current limitercompares a second coil current Iflowing in an input inductor Lwith a second upper threshold value and a second lower threshold value. A duty controller(i) switches a switching transistor Mbased on the first coil current in a cycle where the first coil current Iexceeds the first upper threshold value before the second coil current I, exceeds the second upper threshold value. According to the current controller, it is possible to stabilize an output current and to limit a current.