document 621-1 document 621-1 revised 11/07/13 coupled inductors C msd7342 dimensions are in inches mm core material ferrite core and winding loss go to online calculator terminations rohs compliant matte tin over nickel over phos bronze. other terminations available at additional cost. weight 0.76 C 0.87g ambient temperature C40c to +85c with i rms current, +85c to +125c with derated current storage temperature component: C40c to +125c. tape and reel packaging: C40c to +80c winding to winding isolation 200 vrms 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 250/7 reel; 1000/13 reel plastic tape: 16 mm wide, 0.4 mm thick, 12 mm pocket spacing, 4.9 mm pocket depth pcb washing tested with pure water or alcohol only. for other solvents, see doc787_pcb_washing.pdf. for flyback, sepic and other applications ? tight coupling (k 0.97) and 200 v isolation make the msd7342 series of coupled inductors ideal for use in a variety of circuits including fyback, multi-output buck and sepic. ? they provide high inductance, high effciency and excellent current handling in a rugged, low cost part. ? can also be used as two single inductors connected in series or parallel, as a common mode choke or as a 1 : 1 transformer. 0.295 7,5 max 0.295 7,5 max max dot indicates pin 1 0.028 0,7 0.181 4,6 123 0.110 2,8 0.083 2,1 0.130 3,3 0.043 1,10 1 4 2 3 3 1 2 4 l1 l2 recommended land p attern 0.150 3,8 0.091 2,3 0.063 1,6 1 4 2 3 if board traces are ru ni n these areas , consider masking them to pre v ent shor ting. l1 l2 + + ? ? d c c t ypical fl ybac k co n ver ter v out v in sw l1 l2 ++ + ?? ? d d c c sw t ypical buc k con ver ter with auxiliary output t ypical sepic schematic v out v out v out au x v in v in l1 l2 q c1 c ++ ?? d specifcations subject to change without notice. please check our website for latest information. 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.
document 621-2 document 621-2 revised 02/23/11 document 621-2 revised 11/07/13 coupling leakage i sat (a) 6 i rms (a) inductance 2 dcr max 3 srf typ 4 coeffcient l typ 5 10% 20% 30% both one part number 1 20% (h) (ohms) (mhz) typ (h) drop drop drop windings 7 winding 8 msd7342-252ml_ 2.5 0.033 55 0.97 0.14 6.0 6.2 6.3 2.17 3.06 msd7342-332ml_ 3.3 0.037 43 0.99 0.09 5.2 5.3 5.4 2.05 2.89 msd7342-472ml_ 4.7 0.051 35 0.99 0.11 4.1 4.3 4.6 1.74 2.46 msd7342-562ml_ 5.6 0.063 32 0.99 0.09 3.9 4.1 4.2 1.57 2.22 msd7342-682ml_ 6.8 0.070 30 0.99 0.14 3.7 3.8 3.9 1.49 2.10 msd7342-822ml_ 8.2 0.075 27 0.98 0.25 3.3 3.4 3.5 1.44 2.03 msd7342-103ml_ 10 0.100 22 0.98 0.30 2.8 2.9 3.0 1.24 1.76 msd7342-123ml_ 12 0.120 20 0.98 0.36 2.5 2.6 2.7 1.14 1.61 msd7342-153ml_ 15 0.130 18 0.98 0.49 2.2 2.3 2.4 1.09 1.54 msd7342-183ml_ 18 0.170 15 >0.99 0.16 2.0 2.2 2.3 0.95 1.35 msd7342-223ml_ 22 0.220 13.5 >0.99 0.20 1.9 2.0 2.1 0.84 1.19 msd7342-273ml_ 27 0.250 12.0 >0.99 0.20 1.7 1.8 1.9 0.79 1.11 msd7342-333ml_ 33 0.270 11.0 >0.99 0.15 1.5 1.6 1.7 0.76 1.07 msd7342-393ml_ 39 0.380 10.0 0.99 0.70 1.3 1.4 1.5 0.64 0.90 msd7342-473ml_ 47 0.420 9.5 >0.99 0.30 1.2 1.3 1.4 0.61 0.86 msd7342-563ml_ 56 0.460 8.7 >0.99 0.51 1.1 1.2 1.3 0.58 0.82 msd7342-683ml_ 68 0.600 7.3 >0.99 0.51 1.0 1.1 1.2 0.51 0.72 msd7342-823ml_ 82 0.680 6.2 0.99 1.17 0.90 1.00 1.1 0.48 0.67 msd7342-104ml_ 100 0.770 5.5 >0.99 0.96 0.80 0.92 0.98 0.45 0.63 msd7342-124ml_ 120 1.03 4.5 >0.99 0.61 0.70 0.80 0.90 0.39 0.55 msd7342-154ml_ 150 1.35 4.0 >0.99 0.54 0.65 0.76 0.80 0.34 0.48 msd7342-184ml_ 180 1.52 3.8 >0.99 0.75 0.62 0.66 0.73 0.32 0.45 msd7342-224ml_ 220 1.72 3.5 >0.99 1.43 0.59 0.62 0.66 0.30 0.42 msd7342-274ml_ 270 2.41 3.3 >0.99 1.56 0.55 0.57 0.60 0.25 0.36 msd7342-334ml_ 330 2.70 3.0 >0.99 1.65 0.49 0.52 0.54 0.24 0.34 msd7342-394ml_ 390 3.05 2.8 0.99 4.73 0.45 0.47 0.50 0.23 0.32 msd7342-474ml_ 470 4.00 2.6 0.99 5.50 0.41 0.43 0.46 0.20 0.28 msd7342-564ml_ 560 4.43 2.5 >0.99 4.85 0.38 0.40 0.42 0.19 0.26 msd7342-684ml_ 680 5.00 2.3 0.99 7.59 0.36 0.37 0.38 0.18 0.25 msd7342-824ml_ 820 6.80 2.2 >0.99 8.01 0.30 0.32 0.35 0.15 0.21 msd7342-105ml_ 1000 7.80 2.0 >0.99 8.69 0.27 0.29 0.31 0.14 0.20 1. when ordering, please specify termination and packaging codes: msd7342-105m lc termination: l = rohs compliant matte tin over nickel over phos bronze. special order: t = rohs tin-silver-copper (95.5/4/0.5) or s = non-rohs tin-lead (63/37). packaging: c = 7 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 c instead. d = 13 machine-ready reel. eia-481 embossed plastic tape. factory order only, not stocked (1000 parts per full reel). 2. inductance shown for each winding, measured at 100 khz, 0.1 vrms, 0 adc on an agilent/hp 4284a lcr meter or equivalent. when leads are connected in parallel, inductance is the same value. when leads are connected in series, inductance is four times the value. 3. dcr is for each winding. when leads are connected in parallel, dcr is half the value. when leads are connected in series, dcr is twice the value. 4. srf measured using an agilent/hp 4191a or equivalent. when leads are connected in parallel, srf is the same value. 5. leakage inductance is for l1 and is measured with l2 shorted. 6. dc current, at which the inductance drops the specifed amount from its value without current. it is the sum of the current fowing in both windings. 7. equal current when applied to each winding simultaneously that causes a 40c temperature rise from 25c ambient. see temperature rise calculation. 8. maximum current when applied to one winding that causes a 40c temperature rise from 25c ambient. see temperature rise calculation. 9. electrical specifcations at 25c. refer to doc 639 selecting coupled inductors for sepic applications. refer to doc 362 soldering surface mount components before soldering. coupled inductor core and winding loss calculator this web-based utility allows you to enter frequency, peak-to-peak (ripple) current, and i rms current to predict temperature rise and overall losses, including core loss. go to online calculator coupled inductors C msd7342 series specifcations subject to change without notice. please check our website for latest information. 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.
document 621-3 document 621-3 revised 02/23/11 document 621-3 revised 11/07/13 typical l vs current typical l vs frequency irms derating 1 10 100 1000 10000 0.01 0.1 10 1 current (a) inductance (h) 4.7 h 10 h 47 h 100 h 470 h 1000 h 1 10 100 1000 10000 0.1 1 100 10 frequency (mhz) inductance (h) 4.7 h 10 h 47 h 100 h 470 h 1000 h -40 -20 02 04 06 08 0 100 140 120 ambient temperature (c) 120 110 100 90 80 70 60 50 40 30 20 10 0 25c pe r cent of rated rms i coupled inductors C msd7342 series specifcations subject to change without notice. please check our website for latest information. 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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