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:
Oct. 22, 2024
Filed:
Apr. 07, 2022
Sanken Electric Co., Ltd., Niiza, JP;
Sanken Electric Korea Co., Ltd., Seoul, KR;
Eunsuk Lee, Seoul, KR;
Jungyul Kim, Seoul, KR;
Masaaki Shimada, Niiza, JP;
Shinji Aso, Niiza, JP;
Mitsutomo Yoshinaga, Niiza, JP;
Hanju Kang, Niiza, JP;
SANKEN ELECTRIC CO., LTD., Niiza-shi, JP;
SANKEN ELECTRIC KOREA CO., LTD., Seoul, 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 a current flows in a switching, counts the period of time based on a predetermined clock cycle. An OFF counter detects a period of time during which a current flow through the body diode in a state where no current flows in the switching circuit, counts the period of time. An off-time setting circuit sets the time to turn off the switching circuit. A first comparison circuit compares the cycle count value with turn off time. A second comparison circuit compares a cycle count value output by the ON counter with a comparison result output by the first comparison circuit and outputs a signal to stop transmitting a PWM signal.