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. 23, 2010
Filed:
Dec. 04, 2007
Masato Yoshida, Kanagawa, JP;
Ryou Watabe, Kanagawa, JP;
Shigenori Arai, Kanagawa, JP;
Kazuhisa Takada, Kanagawa, JP;
Masato Yoshida, Kanagawa, JP;
Ryou Watabe, Kanagawa, JP;
Shigenori Arai, Kanagawa, JP;
Kazuhisa Takada, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
There is provided a charging apparatus that, even when an AC adapter is connected and there is heavy load, makes it possible to reduce heat produced due to the power loss of a control transistor, reduce cost and area for implementation, and improve safety. Charging apparatushas: P-channel MOS transistors Mand Mthat control charging current; current detecting resistance Rs that is connected to current output terminals of P-channel MOS transistors Mand Mand detects the charging current; switchthat is arranged on a path that bypasses current detecting resistance Rs; and loadthat receives power supply from batterywithout involving current detecting resistance Rs when switchis closed. Current difference amplifieramplifies the detected voltage of current detecting resistance Rs, comparatorcompares the output voltage of current difference amplifierwith the reference voltage, and thereby, when current flowing into batteryis equal to or less than a predetermined value, switchis closed and current detecting resistance Rs is short-circuited.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile