? coilcraft, inc. 2009 these parts are preproduction products for electrical evaluation only. specification subject to change without notice. flyback transformer document 729 document 729 revised 08/13/09 for microsemi poe pd power supply part l at 0 a 2 l at i pk 3 input dcr max leakage l 4 turns i pk 3 number 1 10% (h) min (h) voltage (v) (ohms) max (h) ratios (a) outputs 5 HA3905-CL_ 27.0 24.3 37 ?57 0.170 (pri) 1.9 3.75 : 1 (pri : sec ) 1.2 5 v, 2.5 a (sec) 0.015 (sec) 1.36 : 1 (pri : aux) 12 v, 20 ma (aux) 0.385 (aux) 1 : 1 (pri : reset) 0.371 (reset) 1. when ordering, please specify packaging code: HA3905-CL 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 for the primary, measured at 250 khz, 0.1 vrms, 0 adc. 3. i pk is peak primary current drawn at minimum input voltage. 4. leakage inductance measured on the primary winding with all secondary pins shorted. 5. output of the seconday is with the windings connected in parallel. 6. electrical specifications at 25c. refer to doc 362 ?soldering surface mount components? before soldering. 0.500 12,70 0.530 13,46 0.039 1,00 0.512 13,00 0.699 17,75 max 0.028 0,70 0.098 2,50 max max 1 10 5 6 0.004 /0,10 dot above pin1 0.080 2,03 1 0.590 14,99 0.050 1,27 0.098 2,50 recommended land pattern secondary windings to be connected in parallel on the pc board ? developed for use with microsemi uc3844 current mode controller and lx1752 buck regulator ? 1500 vrms isolation from primary, aux iliary and reset to secondary; 500 vrms from primary and reset to auxiliary ? designed for 36 v ? 57 v input; 200 khz core material ferrite terminations rohs tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. weight 6.7 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) mean time between failures (mtbf) 26,315,789 hours packaging 175 per 13 reel plastic tape: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth pcb washing only pure water or alcohol recommended dimensions are in inches mm 3 2 5 4 1 aux pri reset sec 6 7 9 10
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