... for led lighting,coil with led light,bobbin core coil,transformer coil former 1.features: EFDtransformer for LED driver,magnetic transformer for led,12v transformer 110v for led,transformer for inverter ... :Switching Transformer with 20 to 80kHz Frequency Range,switching power supply, PCB, STB ... installation space.Application: Used in middle-frequency transformers, coils and all kinds filters. ...