Patents by Inventor Chein-Kuo Shein

Chein-Kuo Shein 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 conversion apparatus with power saving and high conversion efficiency mechanisms
    Patent number: 9735693
    Abstract: A power conversion apparatus is provided. The power conversion apparatus includes a transformer, a synchronous rectification (SR) transistor and an SR control circuit. A first terminal of a primary side of the transformer receives an input voltage. A first terminal of a secondary side of the transformer provides an output voltage to a load. A first drain/source terminal of the SR transistor is coupled to a second terminal of the secondary side of the transformer. A second drain/source terminal of the SR transistor is coupled to a first ground terminal. A gate terminal of the SR transistor receives a control signal. The SR control circuit receives a signal of the first drain/source terminal of the SR transistor to determine statuses of the load and generate the control signal. When the load is a light load, the SR control circuit enters a power-saving mode and turns off the SR transistor.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: August 15, 2017
    Assignee: Power Forest Technology Corporation
    Inventor: Chein-Kuo Shein
  • POWER CONVERSION APPARATUS WITH POWER SAVING AND HIGH CONVERSION EFFICIENCY MECHANISMS
    Publication number: 20160190947
    Abstract: A power conversion apparatus is provided. The power conversion apparatus includes a transformer, a synchronous rectification (SR) transistor and an SR control circuit. A first terminal of a primary side of the transformer receives an input voltage. A first terminal of a secondary side of the transformer provides an output voltage to a load. A first drain/source terminal of the SR transistor is coupled to a second terminal of the secondary side of the transformer. A second drain/source terminal of the SR transistor is coupled to a first ground terminal. A gate terminal of the SR transistor receives a control signal. The SR control circuit receives a signal of the first drain/source terminal of the SR transistor to determine statuses of the load and generate the control signal. When the load is a light load, the SR control circuit enters a power-saving mode and turns off the SR transistor.
    Type: Application
    Filed: April 16, 2015
    Publication date: June 30, 2016
    Inventor: Chein-Kuo Shein