LED driver level distinction and purchase 1) single-ended flyback structure, the first secondary by the high-frequency transformer isolation. 5% 2) constant current control mode for the primary feedback (PSR) technology, constant current accuracy 3) Most of the RM6 core to do the transformer, the EMC control greatly beneficial. 4) Transformer secondary to fly line as an electrical connection, PCB board primary spacing is greater than 5mm, the power of the primary can play high pressure AC3750V 5mA 60s. 5) electrolytic capacitors generally use high-frequency low-resistance long life specifications, can improve the stability of power and life 6) power conversion efficiency of about 79-82%, power factor of 0.6-0.65 or so. 7) power margin is large, good stability 8) the higher the cost, the market price is generally between 12-17RMB. Note: At present, some power supply manufacturers in the development and production of high power factor and no electrolytic ca...