BP9021 is a high precision PSR constant current LED driver chips. Chip inductor current in discontinuous mode for 85Vac ~ 265Vac full range of input voltage, power 3W or less anti-Isolated flyback LED constant current power supply.

* integrated 650V power MOSFET
* PSR constant current control without secondary feedback circuitry
* without transformer auxiliary winding detection and power supply
* LED open-circuit voltage can be adjusted by external resistor