flyback transformers document 592 document 592 revised 09/16/11 for texas instruments lm5072 high power pd 1. when ordering, please specify a packaging code: fa2898-al d packaging: d = 13 machine ready reel. eia-481 embossed plastic tape (175 per full reel). b = less than full reel. in tape, but not machine ready. to have a leader and trailer added ($25 charge), use code letter d instead. 2. inductance is for the primary, measured at 250 khz, 0.7 vrms, 0 adc. 3. i pk is the peak current drawn at minimum input voltage. 4. dcr for the primary and the secondary is with windings connected in parallel. 5. leakage inductance measured on the primary windings with all sec - ondary pins shorted. 6. turns ratios are with the primary windings and the secondary windings connected in parallel. 7. output is with the secondary windings connected in parallel. 8. electrical specifcations at 25c. refer to doc 362 soldering surface mount components before soldering. part l at 0 a 2 l at i pk 3 dcr max (mohms) 4 leakage turns ratio 6 i pk 3 number 1 10% (h) min (h) pri sec aux l (h) 5 pri : sec pri : aux (a) output 7 fa2677-al_ 50 40.8 26 2.6 328 2.20 1 : 0.12 1 : 0.41 2.9 3.3 v, 7.5 a fa2898-al_ 50 40.8 26 4.0 315 1.05 1 : 0.18 1 : 0.41 2.9 5 v, 5 a fa2899-al_ 50 40.8 26 13 315 0.473 1 : 0.35 1 : 0.41 2.9 9 v, 2.8 a fa2900-al_ 50 40.8 26 20 315 0.409 1 : 0.47 1 : 0.41 2.9 12 v, 2.1 a fa2901-al_ 50 40.8 26 37 305 0.381 1 : 0.59 1 : 0.41 2.9 15 v, 1.7 a ? designed for 25 watt poe application ? input range from 18 to 57 v ? primary to secondary isolation: 1500 vrms ? auxiliary winding output: 11 v, 20 ma core material ferrite terminations rohs compliant tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. weight 13.6 C 13.9 g ambient temperature C40c to +125c storage temperature component: C40c to +125c. tape and reel packaging: C40c to +80c resistance to soldering heat max three 40 second refows at +260c, parts cooled to room temperature between cycles 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 175 per 13 reel; plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth pcb washing tested with pure water or alcohol only. for other solvents, see doc787_pcb_washing.pdf 1 2 3 4 9 8 7 12 11 10 au x pr i sec 6 5 the primary windings and the secondary windings are to be connected in parallel on the pc board. 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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