Patents by Inventor Jong-Woon Hong

Jong-Woon Hong 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).

  • Switching mode power supply for low power operation
    Patent number: 7079404
    Abstract: A switching mode power supply is described. The switching mode power supply includes a power supply unit, a mode setting unit, a feedback circuit, and a switching controller. The switching controller controls a main switch to carry out a switching operation at a predetermined duty according to feedback voltage charged in a first capacitor in the normal operation mode, and controls the main switch to repeat a switching on state and a switching off state in the standby mode. The current inputted to the switching controller varies with the operation mode. Accordingly, the minimum voltage for operating the switching controller can be maintained even if output voltage is decreased in the standby mode, and unnecessary power consumption in the switching controller can be reduced.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: July 18, 2006
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jong-Woon Hong, Dong-Young Huh
  • Switching mode power supply for low power operation
    Publication number: 20040076022
    Abstract: A switching mode power supply is described. The switching mode power supply includes a power supply unit, a mode setting unit, a feedback circuit, and a switching controller. The switching controller controls a main switch to carry out a switching operation at a predetermined duty according to feedback voltage charged in a first capacitor in the normal operation mode, and controls the main switch to repeat a switching on state and a switching off state in the standby mode. The current inputted to the switching controller varies with the operation mode. Accordingly, the minimum voltage for operating the switching controller can be maintained even if output voltage is decreased in the standby mode, and unnecessary power consumption in the switching controller can be reduced.
    Type: Application
    Filed: September 26, 2003
    Publication date: April 22, 2004
    Inventors: Jong-Woon Hong, Dong-Young Huh