This Design Note (DN) is an extension to ON Semiconductor’s Application Note AND8427/D and illustrates how the NCL30001 continuous conduction mode power factor corrected single stage flyback controller can be used to implement a constant current LED driver for area lighting applications such as high bay, tunnel, parking garage and roadway lighting.This specific design has been optimized for LEDs that require greater than 3A drive capability such as the Luminus Devices CSM360 and SST90. This design can support up to 8 SST90 devices in series or 2 CSM360. The CSM360 LED has a nominal forward voltage of 12.8 V at a drive current of 3.2A and depending on the color temperature and flux bin can generate 1600-3900 lumens.