Patents by Inventor Hung-Hsun Tsai

Hung-Hsun Tsai 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).

  • Method for extending power supply hold-up time by controlling a transformer turn ratio
    Patent number: 9455637
    Abstract: In one embodiment a method of extending power supply hold-up time by controlling a transformer turn ratio may include an input capacitor receiving an input voltage of a transformer unit. A first control transistor may switch a first transformer winding to an on state in response to the input voltage being above a voltage threshold level. The first control transistor may switch the first transformer winding to an off state in response to the input voltage being below the voltage threshold level. A second control transistor may switch a second transformer winding to an on state in response to the input voltage being below the voltage threshold level, wherein the first transformer winding and the second transformer winding may include separate windings located on a same side of a magnetic core of the transformer unit. In an embodiment the transformer unit may include a power supply unit.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: September 27, 2016
    Assignee: DELL PRODUCTS L.P.
    Inventors: Tsai-Fu Hung, Hung-Hsun Tsai, Yu-Hung Lai, Kuang-Hao Chou
  • METHOD FOR EXTENDING POWER SUPPLY HOLD-UP TIME BY CONTROLLING A TRANSFORMER TURN RATIO
    Publication number: 20160190934
    Abstract: In one embodiment a method of extending power supply hold-up time by controlling a transformer turn ratio may include an input capacitor receiving an input voltage of a transformer unit. A first control transistor may switch a first transformer winding to an on state in response to the input voltage being above a voltage threshold level. The first control transistor may switch the first transformer winding to an off state in response to the input voltage being below the voltage threshold level. A second control transistor may switch a second transformer winding to an on state in response to the input voltage being below the voltage threshold level, wherein the first transformer winding and the second transformer winding may include separate windings located on a same side of a magnetic core of the transformer unit. In an embodiment the transformer unit may include a power supply unit.
    Type: Application
    Filed: December 31, 2014
    Publication date: June 30, 2016
    Applicant: DELL PRODUCTS, L.P.
    Inventors: Tsai-Fu Hung, Hung-Hsun Tsai, Yu-Hung Lai, Kuang-Hao Chou