Patents by Inventor Junelei Li

Junelei Li 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).

  • Method and circuit for constant current buck converter
    Patent number: 9596725
    Abstract: A switch mode power supply (SMPS) includes a buck converter circuit that includes a first inductor coupled to an output terminal and a switch device coupled the first inductor. A controller is configured for regulating the output current based at least in part on controlling a peak current in the first inductor according to a ratio between an instantaneous voltage to an average voltage at the negative output terminal. The controller is configured to cause the SMPS to operate in a boundary conduction mode (BCM). The controller is configured to maintain a constant average output current that is substantially independent of the input voltage and the output voltage, and also provide a high power factor.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: March 14, 2017
    Assignee: Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
    Inventors: Zhimin Hu, Qun Li, Lei Cheng, Junelei Li