Document 704-1 Shielded Coupled Inductors MSD1278T The MSD1278T series of shielded coupled inductors was designed specifically for high temperature applications up to 125C ambient. Tight coupling (k 0.98) and 500 V isolation make them ideal for use in a variety of circuits including flyback, multi- output buck, SEPIC and Zeta. These parts provide high inductance, high efficiency and excellent current handling. They 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 0.484 C AUX max L2 12,3 Dot indicates pin1 ++ 123 L1 0.484 Dash number max V V C OUT D 12,3 IN SW X Internal code Typical Buck Converter with auxiliary output D 0.308 0.010 * ++ 7,8 0,25 L1 C1 Recommended V LandPattern V C Q L2 C OUT IN 0.197 0.217 5,0 5,5 0.138 0.157 Typical SEPIC schematic 3,5 4,0 3 4 2 1 0.197 0.177 5,0 4,5 2 1 3 4 ++ L2 C1 Q V D V CCL1 OUT 0.059 0.079 IN 1,5 2,0 For optional tin-lead and tin-silver-copper * terminations, dimensions are for the mounted Typical Zeta schematic 1 2 part.Dimensions before mounting can be an additional 0.012 inch (0,3 mm). L1 L2 3 4 inches Dimensions are in mm Document 704-1 Revised 04/12/18 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2018 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. Please check web site for latest information. Singapore + 65-6484 8412 sales coilcraft.com.sg HIGH TEMPERATUREDocument 704-2 Shielded Coupled Inductors MSD1278T 6 Isat (A) Irms (A) DCR SRF Coupling Leakage 5 2 3 4 Inductance max typ coefficient L typ 10% 20% 30% both one 1 7 8 Part number (H) (Ohms) (MHz) typ (H) drop drop drop windings winding MSD1278T-472ML 4.7 20% 0.040 33.0 0.98 0.22 13.90 15.20 16.36 3.16 4.47 MSD1278T-562ML 5.6 20% 0.046 30.0 0.98 0.23 13.38 14.86 15.74 2.87 4.06 MSD1278T-682ML 6.8 20% 0.048 23.0 0.98 0.22 12.10 13.56 14.20 2.81 3.98 MSD1278T-822ML 8.2 20% 0.055 20.0 0.98 0.34 10.30 11.52 12.20 2.76 3.90 MSD1278T-103ML 10 20% 0.058 17.0 0.98 0.34 8.80 10.00 10.66 2.56 3.62 MSD1278T-123ML 12 20% 0.062 15.0 0.98 0.36 8.20 9.18 9.74 2.48 3.50 MSD1278T-153ML 15 20% 0.072 13.0 0.99 0.41 7.40 8.36 9.03 2.30 3.25 MSD1278T-183ML 18 20% 0.080 12.0 0.99 0.37 6.50 7.38 7.86 2.18 3.08 MSD1278T-223ML 22 20% 0.096 11.0 0.99 0.41 6.00 6.80 7.26 1.99 2.81 MSD1278T-273ML 27 20% 0.120 10.0 0.99 0.43 5.80 6.56 7.02 1.78 2.52 MSD1278T-333ML 33 20% 0.150 9.5 0.99 0.56 5.50 6.10 6.52 1.59 2.25 MSD1278T-393ML 39 20% 0.161 8.5 0.99 0.64 4.70 5.26 5.60 1.54 2.18 MSD1278T-473ML 47 20% 0.180 7.5 0.99 0.70 3.70 4.34 4.60 1.45 2.05 MSD1278T-563ML 56 20% 0.190 7.0 0.99 0.76 3.60 4.18 4.50 1.41 2.00 MSD1278T-683ML 68 20% 0.210 6.5 0.99 0.88 3.50 4.04 4.32 1.35 1.90 MSD1278T-823ML 82 20% 0.280 5.0 0.99 0.85 3.30 3.72 4.02 1.16 1.65 MSD1278T-104ML 100 20% 0.300 4.5 >0.99 0.90 2.80 3.24 3.46 1.13 1.59 MSD1278T-124KL 120 10% 0.410 4.3 0.99 1.31 2.60 2.94 3.16 0.96 1.36 MSD1278T-154KL 150 10% 0.460 4.1 >0.99 1.46 2.20 2.54 2.70 0.91 1.29 MSD1278T-184KL 180 10% 0.510 4.0 >0.99 0.93 2.10 2.42 2.58 0.86 1.22 MSD1278T-224KL 220 10% 0.690 3.4 >0.99 1.54 1.90 2.16 2.28 0.74 1.05 MSD1278T-274KL 270 10% 0.900 3.1 >0.99 1.17 1.70 1.94 2.10 0.65 0.92 MSD1278T-334KL 330 10% 1.02 2.9 0.99 4.14 1.50 1.70 1.84 0.61 0.86 MSD1278T-394KL 390 10% 1.12 2.7 >0.99 1.64 1.40 1.60 1.70 0.58 0.82 MSD1278T-474KL 470 10% 1.53 2.2 >0.99 0.25 1.30 1.50 1.60 0.50 0.70 MSD1278T-564KL 560 10% 1.69 2.0 >0.99 2.68 1.20 1.34 1.46 0.47 0.67 MSD1278T-684KL 680 10% 2.29 1.7 >0.99 2.11 1.00 1.08 1.22 0.41 0.58 MSD1278T-824KL 820 10% 2.55 1.4 >0.99 2.39 0.900 1.04 1.18 0.39 0.55 MSD1278T-105KL 1000 10% 2.87 1.3 >0.99 4.28 0.850 0.948 1.05 0.37 0.52 1. When ordering, please specify termination and packaging code: Coupled Inductor Core and Winding Loss Calculator This web-based utility allows you to enter frequency, peak-to-peak MSD1278T-105KLD (ripple) current, and Irms current to predict temperature rise and overall Termination: L = RoHS compliant matte tin over nickel over phos losses, including core loss. Go to online calculator. bronze Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Core material Ferrite Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic Core and winding loss Go to online calculator tape (500 parts per full reel). Terminations RoHS compliant matte tin over nickel over phos B = Less than full reel. In tape, but not machine ready. bronze. Other terminations available at additional cost. To have a leader and trailer added ( 25 charge), Weight: 3.7 4.4 g use code letter D instead. Ambient temperature 40C to +125C with Irms current 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 Maximum part temperature +165C (ambient + temp rise) are connected in parallel, inductance is the same value. When leads are Storage temperature Component: 40C to +165C. connected in series, inductance is four times the value. Tape and reel packaging: 40C to +80C 3. DCR is for each winding. When leads are connected in parallel, DCR Winding-to-winding isolation 500 Vrms, one minute is half the value. When leads are connected in series, DCR is twice the Resistance to soldering heat Max three 40 second reflows at value. +260C, parts cooled to room temperature between cycles 4. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value. Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 5. Leakage inductance is for L1 and is measured with L2 shorted. 85% relative humidity) 6. DC current, at which the inductance drops the specified amount from its Failures in Time (FIT) / Mean Time Between Failures (MTBF) value without current. It is the sum of the current flowing in both windings. 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 7. Equal current when applied to each winding simultaneously that causes Packaging 500/13 reel Plastic tape: 24 mm wide, 0.5 mm thick, a 40C temperature rise from 25C ambient. 16 mm pocket spacing, 8.7 mm pocket depth 8. Maximum current when applied to one winding that causes a 40C PCB washing Tested with pure water or alcohol only. For other solvents, temperature rise from 25C ambient. see Doc787 PCB Washing.pdf. 9. Electrical specifications at 25C. Refer to Doc 639 Selecting Coupled Inductors for SEPIC Applications. Refer to Doc 362 Soldering Surface Mount Components before soldering. Document 704-2 Revised 04/12/18 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2018 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. Please check web site for latest information. Singapore + 65-6484 8412 sales coilcraft.com.sg HIGH TEMPERATURE