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:
Feb. 02, 2021
Filed:
May. 23, 2017
Signify Holding B.v., Eindhoven, NL;
Yuhong Fang, Naperville, IL (US);
Xi Chen, Shanghai, CN;
Harshitha Gudipati, Prospect Heights, IL (US);
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
A lighting driver () receives an AC Mains voltage (), employs a rectifier () to produce a rectified voltage, and supplies an output current () to a lighting device () in response to the rectified voltage. A surge protection circuit () of the lighting driver includes a voltage clamping device (MOV) connected across the output of the rectifier, and a differentiator circuit () configured to differentiate between a temporary voltage spike at the input to the rectifier and a loss of neutral connection to the lighting driver. When a temporary voltage spike is detected, the voltage clamping device is activated to clamp the rectified voltage until the temporary voltage spike ends. When a loss of neutral is detected, the voltage clamping device is latched into a disabled state until the AC Mains voltage input to the lighting driver is turned off.