Patents by Inventor Shengyong Yi

Shengyong Yi 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 management circuit with over-current protection and over-current protection method thereof
    Patent number: 11502502
    Abstract: A power management circuit has a power input terminal coupled to a power supply or a load, a power terminal configured to provide an output voltage, and a battery terminal coupled to a battery. The power management circuit further has a current limiting circuit, an over-current indication circuit and an over-current threshold selecting circuit. The current limiting circuit compares a current feedback signal indicative of an output current flowing out of the power terminal with a current threshold signal and generates a square wave signal. The over-current indication circuit generates an over-current indication signal based on the square wave signal. The over-current threshold selecting circuit selects a first over-current threshold voltage or a second over-current threshold voltage as an over-current threshold voltage based on the over-current indication signal, wherein the first over-current threshold voltage is higher than the second over-current threshold voltage.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: November 15, 2022
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Haigang Cao, Shengyong Yi
  • POWER MANAGEMENT CIRCUIT WITH OVER-CURRENT PROTECTION AND OVER-CURRENT PROTECTION METHOD THEREOF
    Publication number: 20220181867
    Abstract: A power management circuit has a power input terminal coupled to a power supply or a load, a power terminal configured to provide an output voltage, and a battery terminal coupled to a battery. The power management circuit further has a current limiting circuit, an over-current indication circuit and an over-current threshold selecting circuit. The current limiting circuit compares a current feedback signal indicative of an output current flowing out of the power terminal with a current threshold signal and generates a square wave signal. The over-current indication circuit generates an over-current indication signal based on the square wave signal. The over-current threshold selecting circuit selects a first over-current threshold voltage or a second over-current threshold voltage as an over-current threshold voltage based on the over-current indication signal, wherein the first over-current threshold voltage is higher than the second over-current threshold voltage.
    Type: Application
    Filed: November 18, 2021
    Publication date: June 9, 2022
    Inventors: Haigang Cao, Shengyong Yi