BP2329A

BP2329A Non-isolated Buck APFC Offline LED Controller Description The BP2329A is a high precision non-isolated buck controller with active PFC, specially designed for universal input offline constant current LED lighting. The controller with on-chip PFC circuit achieves high power factor and low THD. Operating in critical conduction mode, the power MOSFET switching loss is reduced and the inductor is fully utilized. The BP2329A utilizes patent pending floating ground structure. The inductor current is sensed during the whole switching cycle. So it achieves high precision output current control, and excellent line regulation and load regulation. The BP2329A offers rich protection functions to improve the system reliability, including LED open circuit protection, LED short circuit protection, VCC under voltage protection, CS resistor open circuit protection and cycle by cycle current limit. All the protection functions are auto-recovery. The system reliability is further improved by the thermal regulation function. The output current is reduced when the controller is over temperature. Features  Active PFC for High Power Factor and Low THD  System Efficiency up to 95%  ±3% LED Output Current Accuracy  Excellent Line and Load Regulation  Critical Conduction Mode Operation  Ultra Low (33uA) Start Up Current  Ultra Low (300uA) Operating Current  LED Short/Open Protection  Current Sensing Resistor Open Protection  Cycle by Cycle Current Limit  VCC Under Voltage Protecti...