? coilcraft, inc. 2010 specifications subject to change without notice. please check our website for latest information. flyback transformers document 864 document 864 revised 05/04/10 inductance inductance leakage input part at 0 a 2 at i pk 3 dcr max (mohms) 4 inductance turns ratio 6 i pk 3 voltage number 1 10% (h) min (h) pri sec bias max (h) 5 pri : sec : bias (a) (v) output 7 ga3430-bl_ 25.0 22.5 90 15 95 0.685 5 : 1 : 1 2.1 10 ? 14 5.0 v, 1.0 a ga3431-bl_ 25.0 22.5 90 5.0 70 0.945 7 : 1 : 1 2.1 10 ? 14 3.3 v, 1.5 a 1. when ordering, please specify packaging code: ga3431-bl d packaging: d =13 machine-ready reel. eia-481 embossed plastic tape (250 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 for the primary, measured at 250 khz, 0.3 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 secondary pins shorted. 6. turns ratio is with the secondary windings connected in parallel. 7. output is with the secondary windings connected in parallel. bias winding output: 5.0 v, 20 ma (ga3430); 3.3 v, 20 ma (ga3431). 8. electrical specifications at 25c. refer to doc 362 ?soldering surface mount components? before soldering. 0.080 2,03 1 0.450 11,43 0.50 12,7 0.041 1,05 0.413 10,50 0.600 15,24 max 0.460 11,68 0.024 0,60 0.050 1,27 0.098 2,50 0.098 2,50 max max 8 1 5 4 recommended land pattern dot above pin1 0.004 /0,10 core material ferrite terminations rohs tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. weight 3.9 to 4.1 g ambient temperature ?40c to +85c storage temperature component: ?40c to +85c. 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 250 per 13 reel plastic tape: 32 mm wide, 0.5 mm thick, 20 mm pocket spacing, 11.2 mm pocket depth pcb washing only pure water or alcohol recommended ? designed for input range of 10 ? 14 v. ? 1500 vrms isolation from primary and bias to secondary; 500 vrms isolation from primary to bias, tested for one minute ? the bias winding provides power to the chipset 6 5 8 7 pri bias sec 4 1 3 2 secondary windings to be connected in parallel on pc board dimensions are in inches mm
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