toroidal transformer C Q3903-AL document 616 document 616 revised 05/27/09 ? specifed by on semiconductor for use with their ncp1605 pfc controller. referenced as x25, pulse transformer on evaluation board ncp1605forwgevb and application note and8292. ? recommended by texas instruments for use with their uc3875 phase shift resonant controller. ? three 1 : 1 windings ? 500 vrms, one minute winding-to-winding isolation. 1 2 34 5 6 0.95 24,13 0.72 18,29 0.65 16,51 notch indicates pin1 0.475 12,07 0.19 0.02 4,83 0,51 3 6 4 0.140 3,56 0.638 16,21 1 0.051 1,3 0.01256 0.30 0,319 0,75 recommended pc boar d la y out 6 1 5 2 4 3 1 : 1 : 1 inter-winding part inductance 1 dcr max 2 isolation number min (h) (ohms) (vrms) Q3903-AL 210 0.090 500 1. inductance measured between pins 1 and 6, at 15.75 khz, 0.015 vrms, 0 adc using an agilent/hp 4192a impedance analyzer. 2. dcr is per winding, measured on cambridge technology micro- ohmmeter or equivalent. 3. electrical specifcations at 25c. core material ferrite terminations rohs compliant tin-silver over tin over nickel over brass. other terminations available at additional cost. weight 4.3 g ambient temperature C40c to +85c storage temperature component: C40c to +85c. tray packaging: C40c to +80c moisture sensitivity level (msl) 1 (unlimited foor life at <30c / 85% relative humidity) failures in time (fit) / mean time between failures (mtbf) 38 per billion hours / 26,315,789 hours, calculated per telcordia sr-332 packaging 49 per tray pcb washing tested with pure water or alcohol only. for other solvents, see doc787_pcb_washing.pdf dimensions are in inches mm us uk t aiwan china singapore +1-847-639-6400 sales@coilcraft.com +44-1236-730595 sales@coilcraft-eur ope.com +886-2-2264 3646 sales@coilcraft.com.tw +86-21-6218 8074 sales@coilcraft.com.cn + 65-6484 8412 sales@coilcraft.com.sg ? coilcraft inc. 2013 this pr oduct may not be used in medical or high risk applications without prior coilcraft appr oval. specification subject to change without notice. please check web site for latest infor mation.
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