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. 10, 2009
Filed:
Aug. 11, 2004
Jinrong Qian, Plano, TX (US);
Donald P. Folkes, Flower Mound, TX (US);
Dean F. Henderson, Durham, NC (US);
Jinrong Qian, Plano, TX (US);
Donald P. Folkes, Flower Mound, TX (US);
Dean F. Henderson, Durham, NC (US);
Intersil Americas Inc., Milpitas, CA (US);
Abstract
An integrated regulator and charging system including a DC/DC converter, a P-channel device, a battery system and a system/charger controller. The DC/DC converter converts an input voltage to a regulated voltage on a system bus. The battery system includes a rechargeable battery and a current sense device coupled in series between the drain of the P-channel device and ground, where the source of the P-channel device is coupled to the system bus. The system charger/controller regulates the system bus at a minimum voltage level when the battery voltage is below the minimum voltage level, such as a deeply discharged battery. The system charger/controller also regulates charge current through the battery when its voltage is between the minimum voltage level and a maximum voltage level and regulates the system bus at the maximum voltage level when the battery voltage is at the maximum voltage level.