Patents by Inventor Chalermkiat Tepsumran

Chalermkiat Tepsumran 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).

  • Overload protection delay circuit for switching power supply
    Patent number: 7826239
    Abstract: Disclosed is an overload protection delay circuit for use in a switching power supply for enabling the switching power supply to detect overload problems with high accuracy. The overload protection delay circuit is connected between a photo coupler and a pulse-width modulator of the switching power supply, and is consisted of an energy storage device such as a capacitor and a charging controller such as a zener diode. The charging controller is configured to set a limit value for allowing the energy storage device to be charged by an internal current source of the pulse-width modulator when the feedback signal of the switching power supply reaches the limit value. By charging the energy storage device, a time delay is added to the feedback signal so that the pulse-width modulator can accurately activate the internal overload protection mechanism without the interference of load transients.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: November 2, 2010
    Assignee: Delta Electronics (Thailand) Public Company, Limited
    Inventors: Chalermkiat Tepsumran, Allwyn Jacob D. Cunha, Apinun Pomta
  • OVERLOAD PROTECTION DELAY CIRCUIT FOR SWITCHING POWER SUPPLY
    Publication number: 20080239607
    Abstract: Disclosed is an overload protection delay circuit for use in a switching power supply for enabling the switching power supply to detect overload problems with high accuracy. The overload protection delay circuit is connected between a photo coupler and a pulse-width modulator of the switching power supply, and is consisted of an energy storage device such as a capacitor and a charging controller such as a zener diode. The charging controller is configured to set a limit value for allowing the energy storage device to be charged by an internal current source of the pulse-width modulator when the feedback signal of the switching power supply reaches the limit value. By charging the energy storage device, a time delay is added to the feedback signal so that the pulse-width modulator can accurately activate the internal overload protection mechanism without the interference of load transients.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Applicant: Delta Electronics (Thailand) Public Co., Ltd.
    Inventors: Chalermkiat Tepsumran, Allwyn Jacob D. Cunha, Apinun Pomta