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:
Mar. 24, 1998
Filed:
Jan. 15, 1997
Satwinder Malhi, Garland, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method and apparatus is provided for miniaturizing battery overtemperature protection and voltage regulation circuits in which such protection and regulation circuits are formed in an integrated circuit (200, 600) and embedded in the casings of individual batteries. In one aspect of the invention, a MOSFET switch (Q1), a temperature sensitive diode (D1) and a control circuit (604) may be formed in an integrated circuit (600) and embedded in the casing of a battery. The MOSFET switch may be placed in the charging path of the battery to provide an open circuit when the battery temperature exceeds a predetermined value. In another aspect of the invention, the operation of the MOSFET switch (Q1) may be controlled by a control circuit (204) to provide a constant output voltage from the battery, thereby improving the operation of the portable system using the battery.