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:
Sep. 29, 2015
Filed:
Mar. 11, 2014
Denso Corporation, Kariya, Aichi-pref., JP;
Freescale Semiconductor, Inc., Austin, TX (US);
Masahiko Ito, Anjo, JP;
Pierre Turpin, Toulouse, FR;
Erwan Hemon, Goyrans, FR;
Ahmed Hamada, Toulouse, FR;
DENSO CORPORATION, Kariya, JP;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
An airbag apparatus connected with a battery includes activation circuits each of which has a squib and a high-side switching element, a safing switching element connected between the battery and the activation circuits, a safing switch control circuit controlling the safing switching element to provide a target voltage to the activation circuits, a terminal voltage acquiring circuit that acquires a terminal voltage of each squib, and a target voltage setting circuit that sets the target voltage. When a maximum-terminal voltage is lower than a reference voltage, the target voltage setting circuit sets the target voltage to be equal to the reference voltage. When the maximum-terminal voltage is higher than the reference voltage, the target voltage setting circuit sets the target voltage to correspond to the maximum-terminal voltage so that a reverse current is avoided in the high-side switching element.