flyback transformer document 629 document 629 revised 12/14/11 1. when ordering, please specify termination and packaging codes: ga3271-a ld termination: l = rohs tin-silver over tin over nickel over phos bronze. special order: t = rohs tin-silver-copper (95.5/4/0.5) or s = non-rohs tin-lead (63/37). packaging: d = 13 machine-ready reel. eia-481 embossed plastic tape (200 parts 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, 0.1 vrms. 3. peak primary current drawn at minimum input voltage. 4. dcr for the primary and for the secondary are with the windings connected in parallel. 5. leakage inductance is for the primary windings with the secondary windings shorted. 6. turns ratios are with the primary the secondary windings connected in parallel. 7. output of the secondary is with the windings connected in parallel. bias winding output is 15 v, 20 ma. 8. electrical specifcations at 25c. refer to doc 362 soldering surface mount components before soldering. inductance inductance leakage part power at 0 a 2 at i pk 3 dcr max (ohms) 4 inductance 5 turns ratios 6 i pk 3 number 1 (w) 10% (h) min (h) pri sec bias max (h) pri : sec pri : bias (a) output 7 ga3271-al_ 13 117.5 104.0 0.201 0.06 0.335 0.815 1 : 0.457 1 : 0.571 1.0 12 v, 1.0 a core material ferrite terminations rohs tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. weight 5.5 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 200 per 13 reel plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth pcb washing tested with pure water or alcohol only. for other solvents, see doc787_pcb_washing.pdf ? flyback transformer for 13 w poe applications ? designed to operate with 30 C 60 v input at 275 khz ? 1500 vrms, one minute isolation from primary to secondary windings for maxim max5941b pwm controller primary windings and secondary windings to be connected in parallel on pc board. 3 10 5 12 8 1 bias pr i sec 7 2 6 11 0.135 3,43 0.07 1,79 0.098 2,5 11 2 0.340 8,64 0.079 2,01 0.865 21,97 0.590 14,98 0.677 17,20 0.693 17.60 0.665 16,88 0.028 0,72 0.098 2,5 max dot indicates pin 1 max max 1 1 12 12 6 6 7 7 recommended land p attern 0.004 /0,10 g a3271- al xxxx y parts manufactured prior to december 2011 may be marked differently. 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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