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:
Oct. 23, 2001
Filed:
Oct. 23, 2000
Jun Kajiwara, Kyoto, JP;
Shiro Sakiyama, Osaka, JP;
Masayoshi Kinoshita, Osaka, JP;
Katsuji Satomi, Osaka, JP;
Katsuhiro Ootani, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The switching regulator of a synchronous rectifying mode comprises the first and second switches SW,, SW,arranged in series between the power source Vdd and the ground Vss, the switch control unit,which controls the on-off operation of the switches SW,, SW,, and the smoothing circuit,which smoothes the output node potential Vnd. When the signal Sc,indicates that the output node potential Vnd goes below the first reference potential Vr,which is the reference to detect the occurrence of the inrush current while the first switch SW,is in the ON state, the control circuit,turns off the first switch SW,. Thus, the detection of the inrush current is conducted by making use of a voltage drop due to the on resistance of the first switch SW,, so that it is unnecessary to provide a resistance element for detecting the inrush current.