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. 06, 2001
Filed:
Mar. 25, 1999
Alexandru Hatular, Campbell, CA (US);
Micro International, Ltd., , KY;
Abstract
A battery charger IC for controlling operation of a buck converter circuit that includes a series switch and a resistor for sensing battery charging current. The battery charger IC includes a pulse-width-modulation switch drive circuit that, during charging of the battery, supplies to the buck converter circuit with an electrical signal which repeatedly turns-on and then turns-off the series switch. The battery charger IC also includes a charging-current sense amplifier which receives from the current-sensing resistor and amplifies an electrical signal which represents the battery charging electrical current. The charging-current sense amplifier includes a bridge circuit to which is coupled the electrical signal received by the charging-current sense amplifier from the current-sensing resistor and an auto-zero circuit.