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:
May. 13, 2025
Filed:
Aug. 17, 2021
Omron Corporation, Kyoto, JP;
Satoshi Iwai, Kyoto, JP;
Mamoru Sueki, Kyoto, JP;
OMRON CORPORATION, Kyoto, JP;
Abstract
The overcurrent protection circuit includes: a first transistor having an emitter connected to a control voltage; and a second transistor having a base connected to a collector of the first transistor, a collector connected to a base of the first transistor and pulled up to a voltage, and a grounded emitter. When the control voltage exceeds a first threshold voltage, the first and second transistors are turned on, the control voltage decreases as a result of decrease in the pull-up voltage, and a protection operation to turn a switching element off is started, and the overcurrent protection circuit includes a first diode connected between the control voltage and the emitter of the first transistor, and an element circuit connected between the emitter and the base thereof. The element circuit includes any of a second diode, a first resistor, and a parallel circuit including the second diode and the first resistor.