smt power transformer document 376 document 376 revised 08/06/13 1. when ordering, please specify packaging code: a9967-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. 2. inductance is per winding of the primary, measured at 100 khz, 0.1 vrms, 0 adc. inductance of the primary, with three windings connected in series is 90 h. inductance inductance leakage part at 0 a 2 at i pk 3 dcr max 4 inductance 5 i pk 3 number 1 10% (h) min (h) (ohms) max (h) (a) output 6 a9967-al_ 10.0 9.0 0.045 0.200 2.3 15 v, 2 a 1 11 3 10 9 2 12 4 5 8 7 6 1/3 pr imar y 1/3 pr imar y 1/3 pr imar y bias secondar y pr imar y windings to be connected in ser ies on the pc board. secondar y winding to be connected in parallel on the pc board. 0.93 23,62 0.130 3,30 0.05 1,27 0.118 3,0 1 0.450 11,43 1.148 29,15 0.827 21,0 0.810 20,57 0.969 24,6 0.084 2,13 0.028 0,72 0.118 3,0 max max max 1 1 12 12 6 6 7 7 recommended land p attern 0.004 /0,10 a9967-al xxxx y pa rt s manuf actured pr ior to december 2011 ma y be mar ke d diff erently . the a9967-al surface mount transformer works with with linear technology lt1725 isolated flyback controller. it is ideal for use in telecommunications isolated converters and isolated power supplies, and can be used in poe applications. this low-profle transformer is designed for an input volt - age of 36 C 72 volts. it features six 1-to-1 windings and 500 vrms, one minute isolation between windings. for the lt1725, 48 v to 15 v converter, three windings are connected in series for the primary and two windings are connected in parallel for the secondary output of 15 v, 2 a. the remaining winding provides power to the chipset. coilcraft can also custom engineer a transformer to meet your specifc requirements. for free evaluation samples, contact coilcraft or visit www.coilcraft.com . for linear technology lt1725 flyback controller core material ferrite weight: 11.9 g terminations rohs tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. 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 175 per 13 reel plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 12.0 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 3. peak primary current (with three windings connected in series) drawn at minimum input voltage. peak current per winding is 7.0 a. 4. dcr is per winding. 5. leakage inductance is for one winding and is measured with all other windings shorted. 6. output is with both windings of the secondary connected in parallel. 7. electrical specifcations at 25c. refer to doc 362 soldering surface mount components before soldering. 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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