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:
Jun. 24, 2008
Filed:
Jul. 19, 2006
Hiroki Akashi, Osaka, JP;
Takashi Ryu, Kyoto, JP;
Takuya Ishii, Osaka, JP;
Mikio Motomori, Osaka, JP;
Hirohisa Tanabe, Kyoto, JP;
Makoto Ishimaru, Osaka, JP;
Tomoya Shigemi, Osaka, JP;
Hiroki Akashi, Osaka, JP;
Takashi Ryu, Kyoto, JP;
Takuya Ishii, Osaka, JP;
Mikio Motomori, Osaka, JP;
Hirohisa Tanabe, Kyoto, JP;
Makoto Ishimaru, Osaka, JP;
Tomoya Shigemi, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a DC-DC converter conforming to the current mode control system, in which the valley value of an inductor current is controlled for output control, a current detection circuitis configured to detect the current flowing from a low-side FETto an inductorusing an FET, an NPN transistor, an NPN transistor, a PNP transistor, a PNP transistorand a resistor, to detect the current flowing from the inductorto the low-side FETusing an FET, a differential amplifier, an FETand the resistor, and to output a current detection signal Vc.