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. 09, 2001
Filed:
Apr. 14, 2000
Vincent Thierry, Aix en Provence, FR;
International Rectifier Corp., El Segundo, CA (US);
Abstract
A power MOSFET die and a logic and protection circuit die are mounted on a common lead frame pad, such as a TO220 lead frame pad. The logic and protection circuit die includes a MOSFET that is connected in parallel with the power MOSFET but which is smaller than the power MOSFET and which dissipates power at a predetermined fraction of that of the power MOSFET. The logic and protection circuit die also includes a temperature sensor that is in close proximity to the MOSFET and determines the temperature of the MOSFET. The die also includes another temperature sensor that is located distant from the MOSFET to determine the temperature of the lead frame. The temperature of the power MOSFET can be determined from the temperature measured by these two sensors and from the ratio of the power dissipated by the two MOSFETs.