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    transformer winding formula step down

    Abstract: 220vac LED driver power mos selection transformer less power supply 6v output transformer primary 26v secondary 24v R1005 IS31LT3909
    Text: IS31LT3909 Preliminary High PF and Single-Stage fly-back LED Driver with TRIAC Dimming Support Features General Description IS31LT3909 LED driver IC is a peak current detection fly-back configuration controller with active Power factor correction. The IC operates in constant off time


    Original     		IS31LT3909 IS31LT3909 110/220Vac transformer winding formula step down 220vac LED driver power mos selection transformer less power supply 6v output transformer primary 26v secondary 24v R1005 PDF