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. 07, 2020
Filed:
Jun. 08, 2015
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Hirofumi Kurimoto, Hitachinaka, JP;
Mitsuhiko Watanabe, Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-shi, JP;
Abstract
The present invention addresses the problems of: providing a power supply system that does not cause a microcontroller to reset even when an abnormality occurs in the output of a third power supply within a battery voltage range in which an electronic control device ensures operation; and achieving said power supply system at low cost. An electronic control device is provided with: a first power supply circuit that outputs a predetermined voltage; a second power supply circuit that is disposed downstream from the first power supply circuit and that outputs a predetermined voltage; and a third power supply circuit that is disposed downstream from the first power supply circuit and that outputs a predetermined voltage. The electronic control device is characterized by comprising a means that makes it possible to switch the circuit operation state of the third power supply circuit in accordance with the states of the first to third power supply circuits. The electronic control device is also characterized by comprising a means that makes it possible to switch the circuit operation state of the third power supply circuit using only a state detection signal that is generated from the state of the third power supply circuit.