? coilcraft, inc. 2010 specifications subject to change without notice. please check our website for latest information. document 752-1 coupled inductors C lpr6235 document 752-1 revised 05/03/10 ? can be used as step-up or flyback transformers in dc-dc converters or as autotransformers ? perfect for low voltage step-up in energy harvesting applications primary (l1) dcr max srf part turns inductance 2 (ohms) typ 3 i sat 4 number 1 ratio 20% (h) l1 l2 (khz) (a) lpr6235-253pml_ 1 : 20 25 0.20 58 580 0.7 lpr6235-123qml_ 1 : 50 12.5 0.080 200 382 0.9 lpr6235-752rml_ 1 : 90 7.5 0.085 267 257 1.6 lpr6235-752sml_ 1 : 100 7.5 0.085 305 244 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 specifications 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 coefficient (k = 0.95) makes them ideal for use in a variety of applications, such as flyback converters and step-up pulse trans- former applications. the high i sat and low dcr ratings of these low profile parts provide high efficiency and excellent current han- dling in a rugged, 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 typicalflyback converter typical step-up converter v out v out v in v in sync rectifier
? coilcraft, inc. 2010 step-up / flyback transformers C lpr6235 specifications subject to change without notice. please check our website for latest information. 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 number xxxx recommended land pattern 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 04/14/10 core material ferrite weight 460 ? 480 mg terminations rohs compliant silver-palladium-platinum-glass frit. other terminations available at additional cost. ambient temperature ?40c to +85c with i rms current, +85c to +125c with derated current storage temperature component: ?40c to +125c. packaging: ?40c to +80c winding to winding isolation 100 v 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 failures in time (fit) 38 per one billion hours packaging 350/7 reel; 1500/13 reel plastic tape: 12 mm wide, 0.3 mm thick, 8 mm pocket spacing, 3.68 mm pocket depth recommended pick and place nozzle od: 6.2 mm; id: 3.1 mm pcb washing only pure water or alcohol recommended
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