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:
Sep. 25, 2007
Filed:
Aug. 02, 2004
Manabu Inoue, Uji, JP;
Takuya Ishii, Suita, JP;
Keiji Akamatsu, Osaka, JP;
Masaaki Kuranuki, Kyoto, JP;
Hiroki Akashi, Hirakata, JP;
Manabu Inoue, Uji, JP;
Takuya Ishii, Suita, JP;
Keiji Akamatsu, Osaka, JP;
Masaaki Kuranuki, Kyoto, JP;
Hiroki Akashi, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A bypass control section () maintains a bypass switch () in the ON state during the period when a battery voltage (Vi) is higher than the output voltage (Vo) to an external load (L). Upon falling of the output voltage (Vo) at a desired voltage (ET), a converter control section () starts switching control at once, and a step-up chopper () promptly starts boost operation. The bypass control section () maintains the bypass switch () in the ON state from the start of the boost operation of the step-up chopper () until the match between the battery voltage (Vi) and the output voltage (Vo).