BP3123

BP3123 High Precision PSR Constant Current LED Driver Description The BP3123 is a high precision primary-side feedback and regulation controller for LED lighting, it operates in constant current control mode and is designed to work in inductor current discontinuous conduction mode and especially suitable for flyback convertor under universal input. The output power of system is recommended to less than 5W. The BP3123 integrates 650V power MOSFET. Since adopting primary sense and feedback control technology, the secondary sense and feedback circuit is eliminated. The loop compensation components are also removed while maintaining stability overall operating conditions. It uses patent pending source driver architecture and demagnetization sensing technology, the operating current is very low, and it doesn’t need the auxiliary winding for sensing the output current and supplying the chip. The low component counts and small system size are realized. Since using the proprietary high accurate current sense method, the BP3123 realizes ±5% accuracy of LED current along with excellent line and load regulation. The BP3123 offers rich protection functions including LED open/short circuit protection, CS resistor short circuit protection, over-temperature protection, VCC under voltage protection. Typical Application Features  Built-in 650V Power MOSFET  Constant current control without secondary sense and feedback circuit.  No Auxiliary winding for sensing and supplying  Ultra low o...