Patents by Inventor Erlei LI

Erlei 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).

  • Circuit and control method for preventing false turn-on of semiconductor switching device
    Patent number: 11824526
    Abstract: A circuit for preventing false turn-on of a semiconductor switching device includes an active clamp circuit, a control circuit, a power amplifier circuit, and a suppression circuit. The control circuit is coupled to an input of the power amplifier circuit. An output of the power amplifier circuit is coupled to a gate of the semiconductor switching device. The active clamp circuit is configured to operate within a preset period when a voltage between the first end of the semiconductor switching device and a second end of the semiconductor switching device is greater than a preset voltage. The suppression circuit includes a controllable switch, which is configured to turn on after the operation of the active clamp circuit is completed, such that potential at the input of the power amplifier circuit is clamped to a fixed potential.
    Type: Grant
    Filed: March 10, 2022
    Date of Patent: November 21, 2023
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Lifeng Qiao, Jie Zhao, Dehui Zhang, Erlei Li, Teng Liu, Jianping Ying
  • CIRCUIT AND CONTROL METHOD FOR PREVENTING FALSE TURN-ON OF SEMICONDUCTOR SWITCHING DEVICE
    Publication number: 20220337237
    Abstract: A circuit for preventing false turn-on of a semiconductor switching device includes an active clamp circuit, a control circuit, a power amplifier circuit, and a suppression circuit. The control circuit is coupled to an input of the power amplifier circuit. An output of the power amplifier circuit is coupled to a gate of the semiconductor switching device. The active clamp circuit is configured to operate within a preset period when a voltage between the first end of the semiconductor switching device and a second end of the semiconductor switching device is greater than a preset voltage. The suppression circuit includes a controllable switch, which is configured to turn on after the operation of the active clamp circuit is completed, such that potential at the input of the power amplifier circuit is clamped to a fixed potential.
    Type: Application
    Filed: March 10, 2022
    Publication date: October 20, 2022
    Inventors: Lifeng QIAO, Jie ZHAO, Dehui ZHANG, Erlei LI, Teng LIU, Jianping YING