MSD1278-273MLD Coilcraft

Document 499-1 Shielded Coupled Inductors MSD1278 Tight coupling (k 0.98) and 500 V isolation High inductance and high efficiency Excellent current handling Ideal for use in a variety of circuits including flyback, multi-output buck, SEPIC and Zeta. Can also be used as two single inductors connected in series or parallel or as a common mode choke. + + D C V L1 L2 OUT C V IN SW Typical Flyback Converter + D V OUT C AUX L2 ++ 0.484 max L1 12,3 V OUT V D C IN SW Dot indicates pin1 123 0.484 Typical Buck Converter with auxiliary output Dash number max 12,3 X D Internal code ++ L1 C1 V V C Q L2 C OUT IN 0.317 max* 8,05 Recommended LandPattern Typical SEPIC schematic 0.217 0.197 5,5 5,0 0.138 0.157 ++ 3,5 4,0 C1 L2 3 4 2 1 Q 0.197 0.177 V D V CCL1 OUT 5,0 4,5 IN 3 4 2 1 0.059 0.079 Typical Zeta schematic 1,5 2,0 For optional tin-lead and tin-silver-copper * 1 2 terminations, dimensions are for the mounted part.Dimensions before mounting can be L1 an additional 0.012 inch (0,3 mm). L2 inches 3 4 Dimensions are in mm 11: Document 499-1 Revised 08/23/16 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2017 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information.Document 499-2 Shielded Coupled Inductors MSD1278 Series Irms (A) Coupling Leakage 2 3 4 5 6 Part Inductance DCR max SRF typ coefficient inductance Isat both one 1 7 8 number (H) (Ohms) (MHz) typ typ (H) (A) windings winding MSD1278-472ML 4.7 20% 0.038 32.0 0.98 0.22 14.9 3.16 4.47 MSD1278-562ML 5.6 20% 0.046 25.0 0.98 0.23 13.4 2.87 4.06 MSD1278-682ML 6.8 20% 0.048 24.0 0.98 0.22 13.1 2.81 3.98 MSD1278-822ML 8.2 20% 0.050 18.0 0.98 0.34 10.8 2.76 3.90 MSD1278-103ML 10 20% 0.058 16.5 0.98 0.34 10.5 2.56 3.62 MSD1278-123ML 12 20% 0.062 14.5 0.98 0.36 9.6 2.48 3.50 MSD1278-153ML 15 20% 0.072 11.8 0.99 0.41 9.1 2.30 3.25 MSD1278-183ML 18 20% 0.080 10.5 0.99 0.37 8.0 2.18 3.08 MSD1278-223ML 22 20% 0.096 9.0 0.99 0.41 6.8 1.99 2.81 MSD1278-273ML 27 20% 0.120 8.4 0.99 0.43 6.5 1.78 2.52 MSD1278-333ML 33 20% 0.150 7.6 0.99 0.56 5.6 1.59 2.25 MSD1278-393ML 39 20% 0.160 6.5 0.99 0.64 5.5 1.54 2.18 MSD1278-473ML 47 20% 0.180 6.0 0.99 0.70 5.2 1.45 2.05 MSD1278-563ML 56 20% 0.190 5.6 0.99 0.76 4.5 1.41 2.00 MSD1278-683ML 68 20% 0.210 5.0 0.99 0.88 4.1 1.35 1.90 MSD1278-823ML 82 20% 0.280 4.1 0.99 0.85 3.8 1.16 1.65 MSD1278-104ML 100 20% 0.300 3.6 >0.99 0.90 3.4 1.13 1.59 MSD1278-124KL 120 10% 0.410 3.2 0.99 1.31 3.2 0.96 1.36 MSD1278-154KL 150 10% 0.460 3.0 >0.99 1.46 2.8 0.91 1.29 MSD1278-184KL 180 10% 0.510 2.7 >0.99 0.93 2.5 0.86 1.22 MSD1278-224KL 220 10% 0.690 2.5 >0.99 1.54 2.3 0.74 1.05 MSD1278-274KL 270 10% 0.900 2.1 >0.99 1.17 2.1 0.65 0.92 MSD1278-334KL 330 10% 1.02 2.0 0.99 4.14 1.9 0.61 0.86 MSD1278-394KL 390 10% 1.12 1.8 >0.99 1.64 1.7 0.58 0.82 MSD1278-474KL 470 10% 1.43 1.6 >0.99 0.25 1.6 0.50 0.70 MSD1278-564KL 560 10% 1.69 1.5 >0.99 2.68 1.5 0.47 0.67 MSD1278-684KL 680 10% 2.29 1.4 >0.99 2.11 1.3 0.41 0.58 MSD1278-824KL 820 10% 2.55 1.3 >0.99 2.39 1.2 0.39 0.55 MSD1278-105KL 1000 10% 2.83 1.1 >0.99 4.28 1.1 0.37 0.52 1. When ordering, please specify termination and packaging code: 4. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value. MSD1278-105KLD 5. Leakage inductance is for L1 and is measured with L2 shorted. Termination: L = RoHS compliant matte tin over nickel over phos 6. DC current, at which the inductance drops 30% (typ) from its value bronze without current. It is the sum of the current flowing in both windings. Special order: T = RoHS tin-silver-copper 7. Equal current when applied to each winding simultaneously that causes (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). a 40C temperature rise from 25C ambient. This information is for refer- Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic ence only and does not represent absolute maximum ratings. To predict tape (500 parts per full reel). temperature rise go to online calculator. B = Less than full reel. In tape, but not machine ready. 8. Maximum current when applied to one winding that causes a 40C tem- To have a leader and trailer added ( 25 charge), perature rise from 25C ambient. This information is for reference only use code letter D instead. and does not represent absolute maximum ratings. To predict tempera- 2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms, ture rise go to online calculator. 0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads 9. Electrical specifications at 25C. are connected in parallel, inductance is the same value. When leads are Refer to Doc 639 Selecting Coupled Inductors for SEPIC Applications. connected in series, inductance is four times the value. Refer to Doc 362 Soldering Surface Mount Components before soldering. 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. Coupled Inductor Core and Winding Loss Calculator This web-based utility allows you to enter frequency, peak-to-peak (ripple) current, and Irms current to predict temperature rise and overall losses, including core loss. Go to online calculator. Document 499-2 Revised 08/23/16 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2017 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information.