Patents by Inventor Keita ITOHARA

Keita ITOHARA 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 device
    Patent number: 11606033
    Abstract: The switching power supply device includes first and second switches connected in series between an application end of an input voltage and an application end of a low voltage lower than the input voltage, and third and fourth switches connected in series between an application end of the input voltage and an application end of the low voltage, and a control unit configured to control the on/off state of each of the first to fourth switches. The first to fourth switches are configured such that an inductor is provided between a first connection node connecting the first switch and the second switch and a second connection node connecting the third switch and the fourth switch.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: March 14, 2023
    Assignee: ROHM CO., LTD.
    Inventors: Shingo Hashiguchi, Isao Takobe, Keita Itohara, Akihiro Kawano, Hironori Sumitomo
  • SWITCHING POWER SUPPLY DEVICE
    Publication number: 20210376727
    Abstract: The switching power supply device includes first and second switches connected in series between an application end of an input voltage and an application end of a low voltage lower than the input voltage, and third and fourth switches connected in series between an application end of the input voltage and an application end of the low voltage, and a control unit configured to control the on/off state of each of the first to fourth switches. The first to fourth switches are configured such that an inductor is provided between a first connection node connecting the first switch and the second switch and a second connection node connecting the third switch and the fourth switch.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 2, 2021
    Inventors: Shingo Hashiguchi, Isao Takobe, Keita Itohara, Akihiro KAWANO, Hironori SUMITOMO
  • Overcurrent protection circuit and switching power apparatus using the same
    Patent number: 9997902
    Abstract: An overcurrent protection circuit includes a voltage monitoring part configured to monitor an output voltage generated from a periodic switching operation of a switching output stage or a feedback voltage corresponding to the output voltage, a current monitoring part configured to monitor whether a current flowing through the switching output stage is under an overcurrent condition, and a protection operation part configured to perform an overcurrent protection operation in response to monitoring results of both the voltage monitoring part and the current monitoring part.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: June 12, 2018
    Assignee: Rohm Co., Ltd.
    Inventors: Shinji Kawata, Keita Itohara
  • OVERCURRENT PROTECTION CIRCUIT AND SWITCHING POWER APPARATUS USING THE SAME
    Publication number: 20160111868
    Abstract: An overcurrent protection circuit includes a voltage monitoring part configured to monitor an output voltage generated from a periodic switching operation of a switching output stage or a feedback voltage corresponding to the output voltage, a current monitoring part configured to monitor whether a current flowing through the switching output stage is under an overcurrent condition, and a protection operation part configured to perform an overcurrent protection operation in response to monitoring results of both the voltage monitoring part and the current monitoring part.
    Type: Application
    Filed: October 19, 2015
    Publication date: April 21, 2016
    Inventors: Shinji Kawata, Keita ITOHARA