Abstract:In the current background of global energy shortages, energy conservation is the important issue we face. In the area of lighting, the application of LED products which has the advantage of high power conservation, long life, multi-transformation, environmental are attractive to the world's attention .As a new green lighting products, LED is the trend of development in the future .We Will enter a new lighting era which is represented by the LED in the 21st century. LED drivers are necessary in the application of LED lighting. They can supply constant output current and make the LED light even, and also can make the LED’s life longer.
In this paper, we introduce the high-precision constant current source control system which can enhance the stability of the LED lighting source. The system is based on the STC single-chip processor, consists of the Buck circuit, and the BOOST circuit, and the rechargeable circuit of 6V batteries, and voltage amplifier circuit. In addition, the system is also equipped with a 6V battery power as an Emergency Backup Power. Multi-section control strategy is used in the software. This system outputs 10 channels of 30mA constant current, and constant current accuracy reaches ± 1mA.
Key words: LED；stability；constant-current source
