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:
Oct. 05, 2021
Filed:
Dec. 04, 2018
Rohm Co., Ltd., Kyoto, JP;
Akira Fujiwara, Kyoto, JP;
Takashi Kimura, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A system power supply circuit receives an input voltage V, and supplies a power supply voltage to multiple load circuits including a microcomputer. Multiple power supply circuits support the multiple load circuits. An abnormality detection circuit generates an abnormality detection signal that is negated when the input voltage Vis within, and asserted when it deviates from, the first voltage range, and outputs this signal to the microcomputer. The interface circuit can communicate with the microcomputer. The interface circuit receives a control signal generated by the microcomputer in response to abnormality detection signal assertion, and suspends power supply circuit operation of a channel indicated by the control signal. When the input voltage Vdeviates from a second voltage range defined to be wider than the first voltage range, an internal protection circuit suspends at least one power supply circuit of a predetermined channel.