Patents by Inventor Chris Hanchana Thongsouk

Chris Hanchana Thongsouk 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).

  • Power regulation and thermal management circuit
    Patent number: 6667606
    Abstract: This invention provides a means of protecting power dissipating pass elements from exceeding their predetermined thermal limits. In one preferred embodiment, the circuit protects a pass element in a battery charging circuit from exceeding its threshold junction temperature by predicting temperature based upon the voltage across the pass element and the current flowing through it. From this predicted temperature, current is reduced to provide charging of a battery at a constant power. The circuit includes a voltage sensing circuit and a plurality of comparators for selecting a predetermined current based upon the output of the voltage sensing circuit. The circuit provides a piecewise linear approximation of proper pass element voltage and current values to maintain a suitable threshold junction temperature.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: December 23, 2003
    Assignee: Motorola, Inc.
    Inventors: John Wendell Oglesbee, Chris Hanchana Thongsouk, Robert Michael Johnson, Jr.
  • Power regulation and thermal management circuit and method
    Publication number: 20030155899
    Abstract: This invention provides a means of protecting power dissipating pass elements from exceeding their predetermined thermal limits. In one preferred embodiment, the circuit protects a pass element in a battery charging circuit from exceeding its threshold junction temperature by predicting temperature based upon the voltage across the pass element and the current flowing through it. From this predicted temperature, current is reduced to provide charging of a battery at a constant power. The circuit includes a voltage sensing circuit and a plurality of comparators for selecting a predetermined current based upon the output of the voltage sensing circuit. The circuit provides a piecewise linear approximation of proper pass element voltage and current values to maintain a suitable threshold junction temperature.
    Type: Application
    Filed: February 15, 2002
    Publication date: August 21, 2003
    Inventors: John Wendell Oglesbee, Chris Hanchana Thongsouk, Robert Michael Johnson