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. 27, 2009
Filed:
May. 01, 2006
Mikio Motomori, Osaka, JP;
Takuya Ishii, Osaka, JP;
Takashi Ryu, Kyoto, JP;
Hiroki Akashi, Osaka, JP;
Hirohisa Tanabe, Kyoto, JP;
Makoto Ishimaru, Osaka, JP;
Tomoya Shigemi, Osaka, JP;
Mikio Motomori, Osaka, JP;
Takuya Ishii, Osaka, JP;
Takashi Ryu, Kyoto, JP;
Hiroki Akashi, Osaka, JP;
Hirohisa Tanabe, Kyoto, JP;
Makoto Ishimaru, Osaka, JP;
Tomoya Shigemi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A step-up converter includes an inductor which receives input voltage Vi at one end, a first FET of the first conduction type which functions as a switch for determining whether or not energy is accumulated in the inductor, a second FET of the second conduction type which rectifies a current output from the other end of the inductor, an output capacitor having an end connected to the source of the second FET, a current detection circuit, and a feedback control circuit. The current detection circuit detects a current flowing through the first N-channel FET to output current detection signal Vc. The feedback control circuit controls the operations of the first N-channel FET and a P-channel FET based on current detection signal Vc.