... ,UL,GS,KC,PSE,CE 2.Provide constant voltage power supply for Digital set top box.3.Used quality safted components and ... rectifier,MOSFET,capacitor,IC,transformer,inductance,fuse etc.4.Design digital set top box adapter electronics function and mechanism based on ... -in/aging,temperature shock,drop test,vibration test etc.6.Power Switching Efficiency: >83%.7.Load/no-load output tolerance:3 ...