US Patent 7505240 Overcurrent protection device for semiconductor element

Patent 7505240 was granted and assigned to Denso on March, 2009 by the United States Patent and Trademark Office.

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Patent Inventor Names

Hideto Okahara0

Susumu Ueda0

Tadatoshi Asada0

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Patent abstract

An overcurrent protecting device for protecting a semiconductor element from an overcurrent includes: the semiconductor element; a shunt resistor for detecting the overcurrent when the electric current in the semiconductor element exceeds a threshold value; a reference resistor for setting the threshold value; a constant electric current circuit for supplying a constant electric current to the reference resistor; and a comparator for comparing a terminal voltage of the shunt resistor and a terminal voltage of the reference resistor. The shunt resistor is made of a same kind of resistor as the reference resistor.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=075052400

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