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:
Feb. 04, 2014
Filed:
Jun. 05, 2009
Shunzou Ohshima, Kosai, JP;
Shunzou Ohshima, Kosai, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
An overcurrent protection apparatus for a load circuit can detect an overcurrent with a high accuracy without being influenced by a deviation ±ΔRon of the on-resistance of a semiconductor element (T). Supposing that a ratio (R/R) between a resistor Rand a resistor Ris an amplification factor m, a determination voltage generated by resistors R, Ris Vand the average value of the on-resistance of a MOSFET (T) is Ron, the overcurrent protection apparatus for a load circuit controls either a current Iflowing through the resistor Ror a current IRflowing through the resister Rso that the output signal of a compactor CMPis inverted when a current having a value of (V/m/Ron) flows into the MOSFET (T).