? coilcraft, inc. 2010 specifications subject to change without notice. please check our website for latest information. document 580-1 coupled inductors C lpd4012 the lpd4012 coupled miniature shielded inductors are only 1,1 mm high and 4 mm square. their excellent coupling coefficient (k 0.94) makes them ideal for use in sepic applications. in sepic topologies, the re- quired inductance for each winding in a coupled induc- tor is half the value needed for two separate inductors, allowing selection of a part with lower dcr and higher current handling. these inductors provide high efficiency and excellent current handling in a rugged, low cost part. they can also be used as two single inductors con- nected in series or parallel, as a common mode choke or as a 1 : 1 transformer. for sepic and other applications 0.060 1,52 0.0433 0.004 1,10 0,10 dash number internal code dot indicates pin 1 0.155 0.003 3,94 0,076 0.155 0.003 3,94 0,076 xxx x 14 23 recommended land pattern 0.174 4,40 0.103 2,606 0.103 2,606 0.049 1,24 0.049 1,24 0.174 4,40 0.031 0,78 45 typ 1 4 2 3 core material ferrite core and winding loss see www.coilcraft.com/coupledloss weight 54 ? 64 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) failures in time (fit) / mean time between failures (mtbf) 38 per billion hours / 26,315,789 hours, calculated per telcordia sr-332 packaging 1000/7 reel; 3500/13 reel plastic tape: 12 mm wide, 0.25 mm thick, 8 mm pocket spacing, 1.32 mm pocket depth recommended pick and place nozzle od: 4 mm; id: 2 mm pcb washing only pure water or alcohol recommended document 580-1 revised 02/04/10 2 1 4 3 l1 l2 l1 l2 q1 c1 c2 + ++ ?? d1 v out v in load typical sepic schematic refer to application note, document 639, ?selecting coupled inductors for sepic applications? dimensions are in inches mm
specifications subject to change without notice. please check our website for latest information. ? coilcraft, inc. 2010 coupled inductors for sepic applications C lpd4012 series document 580-2 revised 02/04/10 document 580-2 i rms (a) inductance 2 dcr max 3 srf typ 4 i sat (a) 5 both one part number 1 (h) (ohms) (mhz) 10% drop 20% drop 30% drop windings 6 winding 7 lpd4012-331nl_ 0.33 30% 0.042 255 5.2 5.4 5.6 1.87 2.65 lpd4012-561nl_ 0.56 30% 0.087 185 3.7 3.8 3.9 1.30 1.84 lpd4012-821nl_ 0.82 30% 0.100 130 3.2 3.3 3.4 1.21 1.72 lpd4012-152ml_ 1.5 20% 0.185 86 2.50 2.81 2.91 1.15 1.62 lpd4012-222ml_ 2.2 20% 0.235 70 2.30 2.40 2.50 0.95 1.35 lpd4012-332ml_ 3.3 20% 0.320 48 1.80 1.90 2.00 0.75 1.06 lpd4012-472ml_ 4.7 20% 0.500 39 1.60 1.70 1.80 0.65 0.92 lpd4012-562ml_ 5.6 20% 0.620 32 1.50 1.60 1.60 0.55 0.78 lpd4012-682ml_ 6.8 20% 0.530 31 1.20 1.52 1.63 0.60 0.86 lpd4012-822ml_ 8.2 20% 0.600 29 1.10 1.20 1.30 0.55 0.78 lpd4012-103ml_ 10 20% 0.750 25 0.98 1.00 1.10 0.50 0.71 lpd4012-153ml_ 15 20% 1.13 21 0.90 0.72 0.74 0.43 0.60 lpd4012-223ml_ 22 20% 1.63 15 0.70 0.82 0.84 0.34 0.48 lpd4012-333ml_ 33 20% 1.83 12 0.37 0.57 0.58 0.31 0.44 lpd4012-473ml_ 47 20% 2.52 8.8 0.33 0.39 0.40 0.28 0.39 lpd4012-683ml_ 68 20% 3.23 7.8 0.27 0.36 0.37 0.25 0.36 lpd4012-823ml_ 82 20% 3.66 7.3 0.27 0.27 0.29 0.23 0.31 lpd4012-104ml_ 100 20% 4.76 6.1 0.22 0.28 0.29 0.20 0.27 lpd4012-124ml_ 120 20% 5.54 5.3 0.21 0.26 0.27 0.19 0.27 lpd4012-154ml_ 150 20% 6.90 4.6 0.18 0.26 0.27 0.17 0.23 lpd4012-184ml_ 180 20% 8.75 4.1 0.16 0.21 0.23 0.14 0.18 lpd4012-224ml_ 220 20% 11.24 3.3 0.15 0.16 0.17 0.12 0.17 lpd4012-334ml_ 330 20% 17.00 2.8 0.13 0.16 0.16 0.10 0.14 lpd4012-474ml_ 470 20% 24.50 2.3 0.10 0.11 0.12 0.09 0.13 lpd4012-564ml_ 560 20% 26.00 2.1 0.07 0.14 0.15 0.08 0.12 1. please specify termination and packaging codes: lpd4012-564m lc termination: l = rohs compliant silver-palladium-platinum-glass frit. 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 (1000 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 (3500 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. dc current, at which the inductance drops the specified amount from its value without current. it is the sum of the current flowing in both windings. 6. equal current when applied to each winding simultaneously that causes a 40c temperature rise from 25c ambient. see temperature rise calculation. 7. maximum current when applied to one winding that causes a 40c temperature rise from 25c ambient. see temperature rise calculation. 8. electrical specifications at 25c. refer to doc 639 ? selecting coupled inductors for sepic applications.? refer to doc 362 ?soldering surface mount components? before soldering. temperature rise calculation based on specified i rms 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. visit www.coilcraft.com/coupledloss. temperature rise = winding power loss 135c w winding power loss = ( + ) dcr in watts (w) i i l1 2 l2 2 equal current in each winding (1.21 a): winding power loss = (1.21 + 1.21 ) 0.10 = 0.293 w temperature rise = 0.293 w 135c w = 39.6c 22 unequal current ( ii l1 l2 ower loss = (1.5 + 0.8 ) 0.10 = 0.289 w temperature rise = 0.289 w 135c w = 39.0c 22 = 1.5 a, = 0.8 a) winding p : examples for lpd4012-821ml:
specifications subject to change without notice. please check our website for latest information. ? coilcraft, inc. 2010 coupled inductors for sepic applications C lpd4012 series document 580-3 revised 02/04/10 document 580-3 typical l vs current typical current derating -40 -20 0 20 40 60 80 100 140 120 ambient temperature (c) percent of rated current 120 110 100 90 80 70 60 50 40 30 20 10 0 i sat i rms 25c 0.1 1 10 1000 100 0.01 0.1 110 current (a) inductance (h) 330 h 10 h 33 h 100 h 3.3 h 1.5 h 0.33 h typical l vs frequency 0.1 1 10 1000 100 0.1 1 10 100 frequency (mhz) inductance (h) 330 h 10 h 33 h 100 h 3.3 h 1.5 h 0.33 h
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