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. 12, 2019
Filed:
Jun. 04, 2018
Renesas Electronics America Inc., Milpitas, CA (US);
Robert H. Isham, Flemington, NJ (US);
Thomas Hayes, Berkeley Heights, NJ (US);
Andrew L. Webb, Hamilton, NJ (US);
Julio Reyes, Leonia, NJ (US);
Renesas Electronics America Inc., Milpitas, CA (US);
Abstract
Current sensing with RDScorrection is disclosed. In an embodiment, a method comprises: measuring an approximate temperature of a MOS transistor switch by a temperature sensor to yield a measured temperature; calculating a corrected temperature from the measured temperature using a stored temperature sensor gain and offset correction function; measuring a gate drive voltage for the MOS transistor; calculating a voltage correction factor using a stored voltage correction function, wherein the stored voltage correction function is a function of the corrected temperature and the gate drive voltage; measuring a RDSvoltage drop across the MOS transistor switch to yield a measured RDSvoltage drop; and calculating the current using the measured RDSdrop and the voltage correction factor.