Patents by Inventor Di LUO

Di LUO 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).

  • FLYBACK POWER CONVERTER AND CONTROL CIRCUIT AND CONTROL METHOD THEREOF
    Publication number: 20150311778
    Abstract: The present invention provides a flyback power converter and a control circuit and a control method thereof. The flyback power converter includes: a power stage circuit, a voltage sense circuit, a current sense circuit, and a control circuit. When the flyback power converter operates in a quasi-resonant mode, the control circuit determines a time point of turning OFF a power switch in the power stage circuit according to a current sense signal, a pulse width modulation (PWM) frequency of a PWM signal, and a predetermined threshold, wherein the control circuit adaptively adjusts an ON period of the power switch, or adaptively adjusts an operation bandwidth or an amplifier gain of an error amplifier circuit in a feedback control loop according to the PWM frequency to mitigate an output voltage ripple.
    Type: Application
    Filed: April 20, 2015
    Publication date: October 29, 2015
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuang-Fu Chang, Tzu-Chen Lin, Li-Di Luo