BP2879D is a non-isolated low PF dimmable LED drive controller suitable for Buck circuits. It supports PWM and analog dimming signals. Full-range analog dimming and it also supports dimming and shutdown, enabling high-precision and flicker-free lighting. The Buck circuit controlled by BP2879D operates in the critical continuous conduction and quasi-resonant modes of inductive current, thereby achieving higher conversion efficiency and lower electromagnetic interference (EMI) and improving the utilization rate of the transformer. BP2879D adopts an advanced constant current algorithm, which can achieve excellent line regulation and load regulation. BP2879D provides rich protection functions to ensure the reliability of power supply design.