The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2024
Filed:
Apr. 07, 2022
Sanken Electric Co., Ltd., Niiza, JP;
Sanken Electric Korea Co., Ltd., Seoul, KR;
Eunsuk Lee, Seoul, KR;
Kyusam Choi, Seoul, KR;
Jaekuk Yu, Seoul, KR;
Shinji Aso, Niiza, JP;
Mitsutomo Yoshinaga, Niiza, JP;
Hanju Kang, Niiza, JP;
SANKEN ELECTRIC CO., LTD., Niza, JP;
SANKEN ELECTRIC KOREA CO., LTD., Seoui, KR;
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.