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. 19, 2026
Filed:
Nov. 01, 2024
Yazaki Corporation, Tokyo, JP;
Hideaki Masui, Makinohara, JP;
YAZAKI CORPORATION, Tokyo, JP;
Abstract
A power supply control circuit that allows the power to be supplied from a power supply such as a sub-battery to a load for a longer period of time, in the event of a failure of a main power supply. The power supply control circuit () includes: a first circuit () connecting a main battery () and a sub-battery () via a DC/DC converter (); a second circuit () connecting a main battery () and a load (); and a third circuit () connecting the sub-battery () and a load () via a semiconductor switch (). When the main battery () fails, the semiconductor switch () is turned ON to supply the power from the sub-battery () to the load (), and the forward direction of a parasitic diode () of the semiconductor switch () is a direction from the load () to the sub-battery (). Furthermore, the DC/DC converter () boosts the voltage from the main battery () and supplies the boosted voltage to the sub-battery ().