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:
Apr. 26, 2011
Filed:
Sep. 21, 2006
Shunzou Ohshima, Kosai, JP;
Shunzou Ohshima, Kosai, JP;
Yazaki Corporation, Toko, JP;
Abstract
Disclosed is an overcurrent detection device for detecting an overcurrent in a load circuit which is arranged to control the driving and the stopping of a loadby a semiconductor switch (FET) provided between a battery VB and the load. An added voltage (V−V) is generated which is obtained by adding a voltage (V−V) generated across the both ends of the semiconductor switch (FET) to a voltage (V−V) which is generated at the time of current change due to the inductance Lp of a copper foil wiring patternfor coupling the semiconductor switch (FET) and the load. A comparator CMPfor comparing the added voltage with an overcurrent determination voltage (V−V) set in advance is provided. When the comparator CMPdetects that the added voltage exceeds the overcurrent determination voltage, it is determined that an overcurrent is generated.