Patents by Inventor Shinsuke MATSUSHIMA

Shinsuke MATSUSHIMA 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 control circuit, switching power supply device and electronic apparatus
    Patent number: 10110129
    Abstract: A switching control circuit includes: a feedback control part that turns on/off an output switch element so that an output voltage of a switching output circuit becomes to be a target value; a synchronous control part that turns on/off a synchronous rectification element; and a reverse current detection part that detects a reverse current during a turning-on period of the synchronous rectification element, wherein the synchronous control part has operation modes including: an asynchronous mode in which the synchronous rectification element is always turned off; and a synchronous mode in which the synchronous rectification element is turned on when the output switch element is turned off, and is turned off when the reverse current reaches a predetermined reverse current detection level, and wherein the reverse current detection level is gradually raised when the synchronous control part is switched from the asynchronous mode to the synchronous mode.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: October 23, 2018
    Assignee: Rohm Co., Ltd.
    Inventor: Shinsuke Matsushima
  • Switching Control Circuit, Switching Power Supply Device and Electronic Apparatus
    Publication number: 20180041123
    Abstract: A switching control circuit includes: a feedback control part that turns on/off an output switch element so that an output voltage of a switching output circuit becomes to be a target value; a synchronous control part that turns on/off a synchronous rectification element; and a reverse current detection part that detects a reverse current during a turning-on period of the synchronous rectification element, wherein the synchronous control part has operation modes including: an asynchronous mode in which the synchronous rectification element is always turned off; and a synchronous mode in which the synchronous rectification element is turned on when the output switch element is turned off, and is turned off when the reverse current reaches a predetermined reverse current detection level, and wherein the reverse current detection level is gradually raised when the synchronous control part is switched from the asynchronous mode to the synchronous mode.
    Type: Application
    Filed: August 2, 2017
    Publication date: February 8, 2018
    Inventor: Shinsuke MATSUSHIMA