Patents by Inventor Qingjun Chen

Qingjun Chen 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 power supply protection circuit and power supply system
    Patent number: 12665518
    Abstract: A switching power supply protection circuit includes a protection circuit, a switching circuit, a voltage feedback circuit, and a control circuit. The protection circuit is connected to the switching circuit, the voltage feedback circuit, and the control circuit, and controls output switch-on or output switch-off, controls switch-on or switch-off of the switching circuit, and controls the supply voltage. The switching circuit is connected to the control circuit and controls a working state of the control circuit. The voltage feedback circuit is connected to the control circuit and adjusts a control voltage and transmits the feedback voltage to the protection circuit. The control circuit is connected to a power supply and receives a voltage of the power supply for charging, provides a starting voltage for the protection circuit and controls the supply voltage according to the control voltage.
    Type: Grant
    Filed: June 29, 2023
    Date of Patent: June 23, 2026
    Assignee: CARRIER CORPORATION
    Inventors: Qingjun Chen, Shanghua Feng
  • SWITCHING POWER SUPPLY PROTECTION CIRCUIT AND POWER SUPPLY SYSTEM
    Publication number: 20240007002
    Abstract: A switching power supply protection circuit includes a protection circuit, a switching circuit, a voltage feedback circuit, and a control circuit. The protection circuit is connected to the switching circuit, the voltage feedback circuit, and the control circuit, and controls output switch-on or output switch-off, controls switch-on or switch-off of the switching circuit, and controls the supply voltage. The switching circuit is connected to the control circuit and controls a working state of the control circuit. The voltage feedback circuit is connected to the control circuit and adjusts a control voltage and transmits the feedback voltage to the protection circuit. The control circuit is connected to a power supply and receives a voltage of the power supply for charging, provides a starting voltage for the protection circuit and controls the supply voltage according to the control voltage.
    Type: Application
    Filed: June 29, 2023
    Publication date: January 4, 2024
    Inventors: Qingjun Chen, Shanghua Feng