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:
Jun. 21, 2016
Filed:
May. 08, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Takahiro Fukui, Osaka, JP;
Abstract
A control circuit is configured to compare an input voltage measured through an input voltage detection circuit with a first threshold which is lower than a rated voltage of an external DC power supply and with a second threshold which is lower than the first threshold. The control circuit is configured, when detecting that a duration time in which the input voltage is kept lower than the first threshold reaches a predetermined holding period, to stop operating a switching device. The control circuit is configured, after detecting that the input voltage is lower than the second threshold, to more shorten a maximum ON time than that during a normal operation or lengthen an OFF time of the switching device than a maximum OFF time during the normal operation.