document 752-1 coupled inductors C lpr6235 document 752-1 revised 09/24/13 ? can be used as step-up or fyback transformers in dc-dc converters or as autotransformers ? perfect for low voltage step-up in energy harvesting applications ? selected by linear technology for the ltc3108 and ltc3109 ultralow voltage step-up converter and power managers primary (l1) dcr max srf part turns inductance 2 (ohms) typ 3 i sat 4 number 1 ratio 20% (h) l1 l2 (khz) (a) lpr6235-253lml_ 1 : 10 25 0.74 13.7 1300 1.3 lpr6235-253pml_ 1 : 20 25 0.20 72 580 0.7 lpr6235-123qml_ 1 : 50 12.5 0.085 200 360 0.9 LPR6235-752RML_ 1 : 90 7.5 0.085 275 257 1.6 lpr6235-752sml_ 1 : 100 7.5 0.085 316 230 1.6 1. when ordering, please specify packaging code: lpr6235-253pml c packaging: c = 7 machine-ready reel. eia-481 embossed plastic tape (350 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. d = 13 machine-ready reel. eia-481 embossed plastic tape. factory order only, not stocked (1500 parts per full reel). 2. inductance is measured at 100 khz, 0.1 vrms, 0 adc on an agilent/hp 4284a lcr meter or equivalent. 3. srf measured using an agilent/hp 4191a or equivalent. 4. dc current applied to l1, at which the inductance drops 10% from its value without current. 5. electrical specifcations at 25c. refer to doc 362 soldering surface mount components before soldering. these shielded parts are only 3.5 mm high and 6 mm square. the excellent coupling coeffcient (k = 0.95) makes them ideal for use in a variety of applications. they can be used as fyback transformers and step-up pulse transformers. the high i sat and low dcr ratings of these parts provide high effciency and excellent current handling in a rug - ged, low cost design. custom inductance values and turn ratios may be avail - able upon request. for step-up, resonant & flyback applications l1 l1 l2 l2 ++ ? ? d d d c c c c pwm c t ypical step-up co n ver ter t ypical fl ybac k co n ver ter v out v out v in v in sync rectifier 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 752-2 dimensions are in inches mm 0.236 0.003 6,00 0,08 0.236 0.003 6,00 0,08 0.138 3,50 max dash n umber xxxx recommended land p attern 0.060 1,52 0.260 6,60 0.167 4,25 0.167 4,25 0.079 2,00 0.079 2,00 0.260 6,60 0.047 1,2 45 typ 1 1 4 4 2 2 3 3 2 1 4 3 l1 l2 dot indicates pin 1 document 752-2 revised 09/24/13 core material ferrite weight 460 C 480 mg terminations rohs compliant silver-palladium-platinum-glass frit. other terminations available at additional cost. 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 300 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) mean time between failures (mtbf) 26,315,789 hours failures in time (fit) 38 per one billion hours packaging 350/7 reel; 1500/13 reel plastic tape: 16 mm wide, 0.3 mm thick, 12 mm pocket spacing, 3.68 mm pocket depth recommended pick and place nozzle od: 6.2 mm; id: 3.1 mm pcb washing tested with pure water or alcohol only. for other solvents, see doc787_pcb_washing.pdf. 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. step-up / flyback transformers C lpr6235
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