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:
Jan. 23, 2024
Filed:
Sep. 26, 2019
Hitachi Astemo, Ltd., Hitachinaka, JP;
Keishi Komoriyama, Hitachinaka, JP;
Yoichiro Kobayashi, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
To prevent deterioration of current detection accuracy due to a difference in deterioration between a main MOS and a sense MOS. The load drive device includes a main MOS () for supplying a load current to a load, a sense MOS () to be used for detection of the load current, and an equalizer circuit () and a switch () which are provided in parallel between the source terminal of the main MOS and the source terminal of the sense MOS. The drain terminal of the main MOS and the drain terminal of the sense MOS have a common connection, and when a current is detected, the terminal voltage of the main MOS and the terminal voltage of the sense MOS are equalized by the equalizer circuit, and the switch is opened. When a current is not detected, the equalizer circuit is stopped and the switch short-circuits the source terminal of the main MOS and the source terminal of the sense MOS.