? coilcraft, inc. 2008 specifications subject to change without notice. please check our website for latest information. poe transformer document 423 document 423 revised 10/25/06 for national semiconductor lm5070 poe interface 1. when ordering, please specify a packaging code: c1023-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 10 khz, 0.1 vrms, 0 adc. this surface mount flyback transformer was developed specifically for the national semiconductor lm5070 powered devices interface in 13 watt power over ethernet (poe) applications. it is designed to operate at frequencies up to 1 mhz with an with an input voltage of 36 ? 72 volts. output with the secondary windings connected in parallel is 3.3 v, 4.5 a. isolation is 1500 vrms from the primary and auxiliary windings to the secondary. coilcraft can design custom transformers with volt- age, inductance and dcr values to meet your specific requirements. for free evaluation samples, contact coilcraft or order them on-line at www.coilcraft.com. 6 3 4 1 aux pri sec 12 9 8 7 10 11 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 c1023-al 3. i pk is the peak current drawn at minimum input voltage. 4. dcr for the secondary is per winding. 5. leakage inductance is for the primary winding with all other pins shorted. 6. turns ratio is with the secondary windings connected in parallel. 7. capacitance measured between pins 3 and 4 with other pins shorted. 8. isolation is measured from the primary and aux to the secondary. 9. operating temperature range ? 40c to +85c. 10. electrical specifications at 25c. weight: 12.4 g terminations: tin-silver over tin over nickel over phos bronze tape and reel: 175/13 reel, 44 mm tape width part l at 0 a 2 l at i pk 3 dcr max (ohms) 4 leakage turns ratio 6 capacitance 7 i pk 3 isolation 8 number 1 10% (h) 10% (h) pri aux sec l (h) 5 pri : sec pri : aux (pf) (a) (vrms) c1023-al_ 110 99.0 0.139 0.656 0.016 1.40 1 : 0.19 1 : 0.69 70 1.5 1500 secondary windings to be connected in parallel on pc board.
|
