Patents by Inventor Alvin FOK

Alvin FOK 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).

  • Intelligent contact charging devices and methods
    Patent number: 10790689
    Abstract: In a general aspect, a charging apparatus can include a power converter circuit configured to supply, from an input voltage, charging power for charging a battery of an electronic device; and a control circuit configured to determine a charging current limit and a charging voltage of the power converter circuit for charging the battery. Determining the charging current limit and the charging voltage can include: setting the current limit of the power converter circuit to an initial charging current limit and setting the charging voltage to an initial charging voltage; determining whether the power converter circuit is operating in a current limit mode or a voltage limit mode; and iteratively modifying the current limit of the power converter circuit until the power converter circuit dithers between the current limit mode and the voltage limit mode.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: September 29, 2020
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Mukund Krishna, Karttikeya Shah, Alvin Fok
  • INTELLIGENT CONTACT CHARGING DEVICES AND METHODS
    Publication number: 20180145517
    Abstract: In a general aspect, a charging apparatus can include a power converter circuit configured to supply, from an input voltage, charging power for charging a battery of an electronic device; and a control circuit configured to determine a charging current limit and a charging voltage of the power converter circuit for charging the battery. Determining the charging current limit and the charging voltage can include: setting the current limit of the power converter circuit to an initial charging current limit and setting the charging voltage to an initial charging voltage; determining whether the power converter circuit is operating in a current limit mode or a voltage limit mode; and iteratively modifying the current limit of the power converter circuit until the power converter circuit dithers between the current limit mode and the voltage limit mode.
    Type: Application
    Filed: November 7, 2017
    Publication date: May 24, 2018
    Applicant: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Mukund KRISHNA, Karttikeya SHAH, Alvin FOK