Because of pro-environment

longer lifetime

higher photoelectricity efficiency and numerous advantages

LED quickly develops in all walks of life. LED driving power becomes hot point. Theoretically

the service life of LED is more than 100

000 hours. However

during the actual application process

LED is easily damaged

due to inappropriate design of the driving power and driving way. The purpose of this paper is to aim at the constant current power of LED lighting to make it work efficiently and steadily. The primary work principle of LED power is briefly outlined

according to the basic structure of whole electric circuit

the whole design way is given. The design of EMI filter

active power factor correcting （APFC） electric circuit and heat elimination are analyzed in this paper in detail. Finally

the application of the LED power in daily life and some problems need to be solved in the future design are introduced.