? coilcraft, inc. 2008 specifications subject to change without notice. please check our website for latest information. poe transformer document 549 document 549 revised 09/11/06 for national semiconductor lm5071 & lm5072 pd controllers 1. when ordering, please specify a packaging code: FA2519-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. the FA2519-AL surface mount flyback transformer was developed specifically for national semiconductor lm5071 and lm5072 powered devices controllers in 13 watt power over ethernet (poe) applications. it is designed to operate at 250 khz with a poe input voltage of 36 ? 72 volts. it can also accept a 12 v input from auxiliary sources. output with the secondary wind- ings connected in parallel, is 3.3 v, 3.3 a. output of the auxiliary winding is 10 v, 20 ma. coilcraft can also design custom transformers with voltage, inductance and dcr values to meet your specific re quirements. for free evaluation samples, contact coilcraft or order them on-line at www.coilcraft.com. 6 5 aux pri sec 12 9 8 7 10 11 1 3 4 2 0.130 3,30 0.050 1,27 1 0.450 11,43 0.080 2,03 1.181 30,00 0.827 21,00 0.810 20,57 0.969 24,60 0.930 23,62 0.028 0,711 0.118 3,0 0.118 3,0 max dot indicates pin 1 max max 112 6 7 recommended land pattern 0.004 /0,10 FA2519-AL 3. i pk is the peak current drawn at minimum input voltage. 4. dcr for the primary and for the secondary is with the windings connected in parallel. 5. leakage inductance measured on the primary windings with all secondary pins shorted. 6. turns ratio is with the primary windings and the secondary windings connected in parallel. 7. isolation is from primary and auxiliary windings to secondary windings. 8. operating temperature range ? 40c to +125c. 9. electrical specifications at 25c. weight: 13.5 g terminations: tin-silver over tin over nickel over phos bronze tape and reel: 175/13 reel, 44 mm tape width for packaging data see tape and reel specifications section. part l at 0 a 2 l at i pk 3 dcr max (ohms) 4 leakage turns ratio 6 i pk 3 isolation 7 number 1 10% (h) 10% (h) pri aux sec l (h) 5 pri : sec pri : aux (a) (vrms) FA2519-AL_ 55 40.2 0.026 0.388 0.0026 0.62 1 : 0.20 1 : 0.60 2.4 1500 primary windings and secondary windings to be connected in parallel on pc board.
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