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. 06, 2025
Filed:
Apr. 19, 2022
Signify Holding B.v., Eindhoven, NL;
Jie Fu, Shanghai, CN;
Shiguang Sun, Shanghai, CN;
Zhiquan Chen, Shanghai, CN;
Feng Ju, Shanghai, CN;
Yu Wang, Shanghai, CN;
Gang Wang, Shanghai, CH;
SIGNIFY HOLDING, B.V., Eindhoven, NL;
Abstract
To provide a safer over voltage protection, it is provided a driving circuit for a light emitting source, comprising an input adapted to receive a power supply; a conversion circuit, adapted to convert the power supply and provide a converted power, comprising a power switch (M); an output, adapted to output the converted power; an output capacitor (C) connected at the output; a first control circuit coupled to the output and connected to the power switch (M), adapted to sense a voltage corresponding to the voltage on the output capacitor and control the power switch operate in a power-reducing mode to reduce the converted power when the voltage corresponding to the voltage on the output capacitor sensed by the first control circuit exceeds a first level; and a second control circuit (D) connected to the output capacitor (C) and connected to a control terminal of the power switch (M), adapted to sense a voltage at the output capacitor (C) and damage and make the power switch (M) unoperational permanently when the voltage at the output capacitor (C) sensed by the second control circuit exceeds a second level.