This paper proposes a high-power LED driver circuit with economical high power factor based on universal chip NCP1200. NCP1200 itself doesn’t have the function of APFC, however, by adding a simple amplitude control circuit in the periphery without using special dedicated APFC chip, the APFC rectification mode can be achieved at work, which greatly reduce the pulse current caused by first-time rectification, the power factor can be as high as 98%, and it can achieve the goal of constant current drive in the meantime. The designed circuit is simple, low cost, stable and reliable work ability and it has high cost performance.
A study of low cost inverter for flourecent lamps with high power factor