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:
Nov. 23, 2021
Filed:
Apr. 19, 2020
Xiamen Eco Lighting Co. Ltd., Xiamen, CN;
Shuisheng Wen, Xiamen, CN;
Liping Lin, Xiamen, CN;
XIAMEN ECO LIGHTING CO. LTD., Xiamen, CN;
Abstract
An LED driving circuit includes a power source, a first voltage stepping-down module, a constant current driving module, a second voltage stepping-down module, a DIP switch module, a control module and a loading module. The power source provides a source voltage. The first voltage stepping-down module reduces the source voltage's voltage level and correspondingly generates a first buck voltage. The second voltage stepping-down module reduces the first buck voltage's voltage level to generate a second buck voltage. The DIP switch module generates a maximal current indicating signal according to the second bulk voltage. The control module generates a PWM signal based on the second buck voltage and the maximal current indicating signal. The constant current driving module generates a drive current according to the first buck voltage and the PWM signal, and drives the loading module using the drive current.