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. 30, 2015
Filed:
Jul. 14, 2011
Frans Pansier, Nuenen, NL;
Frans Pansier, Nuenen, NL;
NXP B.V., Eindhoven, NL;
Abstract
A method and controller for power dependant mains under-voltage ('brown-out') protection is disclosed. Brown-out protection is meant for protection against overheating due to low mains voltage and associated high mains current. The disclosed method and controller allow for lower mains voltages at low load by comparing the mains voltage with a signal indicating the actual power level of the power supply. In converters such as flyback converters, this brown-out protection can be implemented by comparing the actual peak voltage of the mains voltage with a control signal that indicates the power level. In other embodiments, the mains voltage is compared to a preset level by means of a comparator. Provided the voltage passes the preset level prior to opening the control window, the SMPS functions normally. Conversely, brown-out protection is initiated if the voltage does not pass the preset level before the control window opens.