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:
Feb. 27, 2018
Filed:
Dec. 08, 2014
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Masahito Sonehara, Hitachinaka, JP;
Youichirou Kobayashi, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
A load-driving circuit for receiving a supply of power from a power source and driving a load, wherein the load-driving circuit is provided with: a high-side switching element; a low-side switching element; a high-side current detection circuit connected in parallel to the high-side switching element, the high-side current detection circuit detecting a high-side driving current; and a fault detection circuit for detecting the fault state of the load-driving circuit from the output result of the high-side current detection circuit. The high-side current detection circuit is provided with a high-side sense switching circuit operating in response to a gate signal that is different from the high-side switching element, the high-side sense switching circuit comprising a device of the same type as the high-side switching element. The output result of the high-side current detection circuit, the gate signal of the high-side switching element, and the gate signal of the high-side sense switching element are input and the fault states are detected apart from each other when the connection terminal between the load-driving circuit and the load is in a state of short circuit with the positive electrode side of the power source or in a state of short circuit with the negative electrode side of the power source.