? coilcraft, inc. 2009 specifications subject to change without notice. please check our website for latest information. smt power transformer document 452 document 452 revised 10/28/08 leakage part l at 0 a 2 l at i pk 3 dcr max (ohms) l max 5 turns ratio i pk 3 number 1 power 10% (h) min (h) pri sec 4 bias (h) pri : sec 6 pri : bias (a) output 7 c1048-al_ 13 w 94.0 84.6 0.210 0.01 0.453 3.9 1 : 0.12 1 : 0.47 1.2 5 v, 2 a 2 4 primary 6 1 bias secondary 12 9 10 11 for li near technology l t1725 isolated flyback controller 0.135 3,43 0.07 1,79 1 12 0.335 8,51 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 0.098 2,5 max dot indicates pin 1 max max 1 12 6 7 recommended land pattern 0.004 /0,10 1. when ordering, please specify packaging code: c1048-al d packaging: d =13 machine ready reel. eia-481 embossed plastic tape (200 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, 0.3 vrms, 0 adc. 3. peak primary current drawn at minimum input voltage. secondary windings to be connected in parallel on pc board core material ferrite terminations rohs tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. weight 5.1 g ambient temperature ?40c to +125c storage temperature component: ?40c to +125c. packaging: ?40c to +80c resistance to soldering heat max three 40 second reflows at +260c, parts cooled to room temperature between cycles moisture sensitivity level (msl) 1 (unlimited floor 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, 0.35 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth pcb washing only pure water or alcohol recommended ? can be used in isolated and nonisolated designs ? operates with 36 ?72 volts input; can be used for poe. ? 1500 vrms isolation between the primary and the secondary 4. dcr is for both windings of the secondary connected in parallel. 5. leakage inductance is for the primary winding with the secondary windings shorted. 6. turns ratio is with the secondary windings connected in parallel. 7. output is with the secondary windings connected in parallel. output of the bias winding with a 15 v, 0.2 a. 8. operating temperature range ?40c to +125c. 9. electrical specifications at 25c. refer to doc 362 ?soldering surface mount components? before soldering.
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