Patents by Inventor Koji TSUZURABARA

Koji TSUZURABARA 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).

  • Patent number: 12027972
    Abstract: A power supply control semiconductor device that generates and outputs a drive pulse to turn on and off a switch, which is configured to intermittently supply a current to a primary winding of a voltage conversion transformer, in response to input of a voltage proportional to the current flowing through the primary winding of the voltage conversion transformer and an output voltage detection signal from a secondary side of the voltage conversion transformer is provided. The power supply control semiconductor device is in a no-lead resin-sealed package. The package includes external terminals including a first terminal as an input terminal, a second terminal provided next to the first terminal, and third terminals that have a lower breakdown voltage relative to the first terminal and are different from the second terminal. An interval between the first terminal and the second terminal is wider than each interval between the third terminals.
    Type: Grant
    Filed: February 8, 2023
    Date of Patent: July 2, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yusuke Ohba, Naoya Nishio, Koji Tsuzurabara, Hiroki Matsuda
  • Publication number: 20230268828
    Abstract: A power supply control semiconductor device that generates and outputs a drive pulse to turn on and off a switch, which is configured to intermittently supply a current to a primary winding of a voltage conversion transformer, in response to input of a voltage proportional to the current flowing through the primary winding of the voltage conversion transformer and an output voltage detection signal from a secondary side of the voltage conversion transformer is provided. The power supply control semiconductor device is in a no-lead resin-sealed package. The package includes external terminals including a first terminal as an input terminal, a second terminal provided next to the first terminal, and third terminals that have a lower breakdown voltage relative to the first terminal and are different from the second terminal. An interval between the first terminal and the second terminal is wider than each interval between the third terminals.
    Type: Application
    Filed: February 8, 2023
    Publication date: August 24, 2023
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yusuke OHBA, Naoya NISHIO, Koji TSUZURABARA, Hiroki MATSUDA