flyback transformers document 445 document 445 revised 10/29/08 for national semiconductor lm5070 poe interface C 13 watt inductance inductance leakage part at 0 a 2 at i pk 3 dcr max (ohms) 4 inductance turns ratio 6 i pk 3 number 1 10% (h) min (h) pri bias sec max (h) 5 pri : sec pri : bias (a) output 7 c1495-al_ 127 114.3 0.255 0.310 0.024 1.25 1 : 0.166 1 : 0.50 1.0 3.3 v, 4.0 a c1585-al_ 127 114.3 0.222 0.348 0.039 0.950 1 : 0.25 1 : 0.50 1.0 5.0 v, 2.6 a c1586-al_ 127 114.3 0.199 0.308 0.129 0.650 1 : 0.50 1 : 0.50 1.0 12 v, 1.08 a 1. when ordering, please specify packaging code: c1586-al d packaging: d = 13 machine-ready reel. eia-481 embossed plastic tape (175 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. 4 1 3 2 10 8 bias pr i sec 7 9 2. inductance is for the primary, measured at 250 khz, 0.2 vrms, 0 adc. 3. i pk is peak primary current drawn at minimum input voltage. 4. dcr for the secondary is per winding. 5. leakage inductance measured between pins 3 and 4 with all other pins shorted. 6. turns ratio is with the secondary windings connected in parallel. 7. output of the secondary is with the windings connected in parallel. bias winding output is 12 v, 20 ma. 8. electrical specifcations at 25c. refer to doc 362 soldering surface mount components before soldering. 0.080 2,03 1 0.500 12,70 0.530 13,46 0.039 1,00 0.512 13,00 0.699 17,75 max 0.590 14,99 0.028 0,70 0.050 1,27 0.098 2,50 0.098 2,50 max max 5 6 1 10 recommended land p attern 0.004 /0,10 dot abo ve pin1 secondary windings to be connected in parallel on the pc board ? flyback transformers for 13 w poe applications ? designed to operate in continuous mode at 250 khz with an input of 36 C 72 vdc ? 1500 vrms isolation from primary and bias to secondary core material ferrite terminations rohs tin-silver (96.5/3.5) over tin over nickel over phos bronze. other terminations available at additional cost. weight 6.15 g ambient temperature C40c to +85c storage temperature component: C40c to +85c. 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: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth 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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