US 10,172,199 B1
Light-actuated wide voltage range LED lamp driver circuit
Jianrong Zhu, Taizhou (CN)
Assigned to Taizhou JiaoGuang Lighting Co., Ltd., Taizhou (CN)
Filed by Jianrong Zhu, Taizhou (CN)
Filed on Apr. 5, 2018, as Appl. No. 15/946,019.
Claims priority of application No. 2017 1 0524616 (CN), filed on Jun. 30, 2017.
Int. Cl. H05B 33/08 (2006.01)
CPC H05B 33/0815 (2013.01) [H05B 33/0824 (2013.01); H05B 33/0854 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A light-actuated wide voltage range LED lamp driver circuit, comprising:
a rectifier module connecting mains and two LED modules, the two LED modules consisting of a first LED module and a second LED module;
a detection module capable of detecting whether an input voltage is in a low voltage range or in a high voltage range;
a module configured to switch two LED modules in series or in parallel, the module capable of controlling the two LED modules to work at a rated power;
output terminals of the rectifier module connected to the detection module and the module;
a voltage set value of the module, the voltage set value configured to switch the two LED lamps into series connection;
a first transistor of the detection module; and
a second transistor of the detection module;
wherein the detection module and the two LED modules connected to the module;
wherein the module outputs a reference voltage to the first transistor and the second transistor;
wherein the rectifier module outputs a detection voltage to the first transistor and the second transistor;
wherein at the low voltage range, both the first transistor and the second transistor are turned off, making the two LED modules connected in parallel; and
wherein at the high voltage range, both the first transistor and the second transistor are turned on, making the two LED modules connected in series.