Patents by Inventor Jaekuk YU

Jaekuk YU 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 apparatus
    Patent number: 11973431
    Abstract: A detector compares a drain voltage with a first threshold voltage and outputs a first detection signal. An ON-counter detects a period of time during which current flows in a switching circuit based on the first detection signal, counts the period of time based on a predetermined clock cycle, and outputs an ON-count value. A first comparator receives the ON-count value and an ON-threshold value and outputs a first comparison signal when the ON-count value and the ON-threshold value match. A second comparator receives the ON-count value and a decreased ON threshold value, compares the ON-count value and the decreased ON-threshold value, and outputs a second comparison signal. An ON-mask time adjuster receives the second comparison signal and outputs an ON-threshold value for adjusting a mask time and a decreased ON-threshold value that is less than the ON threshold value.
    Type: Grant
    Filed: April 7, 2022
    Date of Patent: April 30, 2024
    Assignees: SANKEN ELECTRIC CO., LTD., SANKEN ELECTRIC KOREA CO., LTD.
    Inventors: Eunsuk Lee, Kyusam Choi, Jaekuk Yu, Shinji Aso, Mitsutomo Yoshinaga, Hanju Kang
  • SWITCHING POWER SUPPLY APPARATUS
    Publication number: 20230327569
    Abstract: A detector compares a drain voltage with a first threshold voltage and outputs a first detection signal. An ON-counter detects a period of time during which current flows in a switching circuit based on the first detection signal, counts the period of time based on a predetermined clock cycle, and outputs an ON-count value. A first comparator receives the ON-count value and an ON-threshold value and outputs a first comparison signal when the ON-count value and the ON-threshold value match. A second comparator receives the ON-count value and a decreased ON threshold value, compares the ON-count value and the decreased ON-threshold value, and outputs a second comparison signal. An ON-mask time adjuster receives the second comparison signal and outputs an ON-threshold value for adjusting a mask time and a decreased ON-threshold value that is less than the ON threshold value.
    Type: Application
    Filed: April 7, 2022
    Publication date: October 12, 2023
    Applicants: SANKEN ELECTRIC CO., LTD., SANKEN ELECTRIC KOREA CO.,LTD.
    Inventors: Eunsuk LEE, Kyusam CHOI, Jaekuk YU, Shinji ASO, Mitsutomo YOSHINAGA, Hanju KANG