Patents by Inventor Donald P. Folkes

Donald P. Folkes has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7489109
    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.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: February 10, 2009
    Assignee: Intersil Americas Inc.
    Inventors: Jinrong Qian, Donald P. Folkes, Dean F. Henderson