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. 14, 2010
Filed:
Sep. 19, 2007
Takuya Ishii, Osaka, JP;
Mikio Motomori, Osaka, JP;
Kazuhito Kimura, Kyoto, JP;
Yoichi Deguchi, Osaka, JP;
Satoshi Wada, Osaka, JP;
Yoshihisa Minami, Shiga, JP;
Takuya Ishii, Osaka, JP;
Mikio Motomori, Osaka, JP;
Kazuhito Kimura, Kyoto, JP;
Yoichi Deguchi, Osaka, JP;
Satoshi Wada, Osaka, JP;
Yoshihisa Minami, Shiga, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A power supply device includes an inductor controlled by switching to be charged or discharged such that a DC input voltage is boosted and a capacitor which smoothes the boosted voltage to generate a DC output voltage. Specifically, the power supply device further includes a transistor connected between the inductor and the capacitor to carry out a rectification function; an output voltage determination circuit which refers to the DC input voltage and the DC output voltage to determine the level of these voltages; and a current control circuit which controls a current flowing through the transistor such that the current has a predetermined value when the output voltage determination circuit determines that the DC output voltage is lower than the DC input voltage.