Document 704-1 Coupled Inductors MSD1278T For high temperature applications The MSD1278T series of shielded coupled inductors was designed specifically for high temperature applications – up to 125°C ambient. Tight coupling (k ≥ 0.98) and 500 V isolation make them ideal for use in a variety of circuits including flyback, multioutput 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 L1 C L2 VOUT C VIN – SW – Typical Flyback Converter 0.484 max 12,3 0.484 max 12,3 123 X D L2 + VOUT C AUX – Dot indicates pin1 + Dash number + VIN L1 D SW VOUT C – Internal code – Typical Buck Converter with auxiliary output 0.308 ±0.010 * 7,8 ±0,25 0.197 5,0 L1 Recommended Land Pattern VIN 0.217 5,5 0.197 5,0 0.138 3,5 D + 4 2 1 2 1 3 4 0.177 4,5 * For optional tin-lead and tin-silver-copper terminations, dimensions are for the mounted part. Dimensions before mounting can be an additional 0.012 inch (0,3 mm). VIN – L1 3 2 VOUT – + 0.079 2,0 1 C Typical SEPIC schematic + L2 C1 Q 0.059 1,5 L2 Q – 0.157 4,0 3 C + C1 L1 C D Typical Zeta schematic C VOUT – L2 4 inches Dimensions are in mm US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 704-1 Revised 04/05/13 © Coilcraft Inc. 2016 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 704-2 High Temperature Coupled Inductors – MSD1278T DCR SRF CouplingLeakage Isat (A)6 Irms (A) Inductance2 max3 L typ510% 20% 30% typ4coefficient both one Part number1 (µH) (Ohms) (MHz) typ (µH) drop dropdrop windings7 winding8 MSD1278T-472ML_ 4.7 ±20% MSD1278T-562ML_ 5.6 ±20% MSD1278T-682ML_ 6.8 ±20% MSD1278T-822ML_ 8.2 ±20% MSD1278T-103ML_ 10 ±20% 0.040 0.046 0.048 0.055 0.058 33.0 30.0 23.0 20.0 17.0 0.98 0.98 0.98 0.98 0.98 0.22 0.23 0.22 0.34 0.34 13.90 13.38 12.10 10.30 8.80 15.20 14.86 13.56 11.52 10.00 16.36 15.74 14.20 12.20 10.66 3.16 2.87 2.81 2.76 2.56 4.47 4.06 3.98 3.90 3.62 MSD1278T-123ML_ 12 ±20% MSD1278T-153ML_ 15 ±20% MSD1278T-183ML_ 18 ±20% MSD1278T-223ML_ 22 ±20% MSD1278T-273ML_ 27 ±20% 0.062 0.072 0.080 0.096 0.120 15.0 13.0 12.0 11.0 10.0 0.98 0.99 0.99 0.99 0.99 0.36 0.41 0.37 0.41 0.43 8.20 7.40 6.50 6.00 5.80 9.18 8.36 7.38 6.80 6.56 9.74 9.03 7.86 7.26 7.02 2.48 2.30 2.18 1.99 1.78 3.50 3.25 3.08 2.81 2.52 MSD1278T-333ML_ 33 ±20% MSD1278T-393ML_ 39 ±20% MSD1278T-473ML_ 47 ±20% MSD1278T-563ML_ 56 ±20% MSD1278T-683ML_ 68 ±20% 0.150 0.161 0.180 0.190 0.210 9.5 8.5 7.5 7.0 6.5 0.99 0.99 0.99 0.99 0.99 0.56 0.64 0.70 0.76 0.88 5.50 4.70 3.70 3.60 3.50 6.10 5.26 4.34 4.18 4.04 6.52 5.60 4.60 4.50 4.32 1.59 1.54 1.45 1.41 1.35 2.25 2.18 2.05 2.00 1.90 MSD1278T-823ML_ 82 ±20% MSD1278T-104ML_ 100 ±20% MSD1278T-124KL_ 120 ±10% MSD1278T-154KL_ 150 ±10% MSD1278T-184KL_ 180 ±10% 0.280 0.300 0.410 0.460 0.510 5.0 4.5 4.3 4.1 4.0 0.99 >0.99 0.99 >0.99 >0.99 0.85 0.90 1.31 1.46 0.93 3.30 2.80 2.60 2.20 2.10 3.72 3.24 2.94 2.54 2.42 4.02 3.46 3.16 2.70 2.58 1.16 1.13 0.96 0.91 0.86 1.65 1.59 1.36 1.29 1.22 MSD1278T-224KL_ MSD1278T-274KL_ MSD1278T-334KL_ MSD1278T-394KL_ MSD1278T-474KL_ 0.690 0.900 1.02 1.12 1.53 3.4 3.1 2.9 2.7 2.2 >0.99 >0.99 0.99 >0.99 >0.99 1.54 1.17 4.14 1.64 0.25 1.90 1.70 1.50 1.40 1.30 2.16 1.94 1.70 1.60 1.50 2.28 2.10 1.84 1.70 1.60 0.74 0.65 0.61 0.58 0.50 1.05 0.92 0.86 0.82 0.70 1.69 2.29 2.55 2.87 2.0 1.7 1.4 1.3 >0.99 >0.99 >0.99 >0.99 2.68 2.11 2.39 4.28 1.20 1.00 0.900 0.850 1.34 1.08 1.04 0.948 1.46 1.22 1.18 1.05 0.47 0.41 0.39 0.37 0.67 0.58 0.55 0.52 220 ±10% 270 ±10% 330 ±10% 390 ±10% 470 ±10% MSD1278T-564KL_ 560 ±10% MSD1278T-684KL_ 680 ±10% MSD1278T-824KL_ 820 ±10% MSD1278T-105KL_ 1000 ±10% 1. When ordering, please specify termination and packaging code: Coupled Inductor Core and Winding Loss Calculator MSD1278T-105KLD Termination:L =RoHS compliant matte tin over nickel over phos bronze Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Packaging: D =13″ machine-ready reel. EIA-481 embossed plastic tape (500 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. 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. Leakage inductance is for L1 and is measured with L2 shorted. 6. 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. 7. Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. See temperature rise calculation. 8. Maximum current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. See temperature rise calculation. 9. Electrical specifications at 25°C. Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.” Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 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. Core material Ferrite Core and winding loss Go to online calculator Terminations RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. Weight: 3.7 – 4.4 g Ambient temperature –40°C to +125°C with Irms current Maximum part temperature +165°C (ambient + temp rise) Storage temperature Component: –40°C to +165°C. Tape and reel packaging: –40°C to +80°C Winding-to-winding isolation 500 Vrms, one minute Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 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 500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf. US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 704-2 Revised 04/05/13 © Coilcraft Inc. 2016 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 704-3 High Temperature Coupled Inductors – MSD1278T Typical L vs Current Typical L vs Frequency 10000 10000 1000 µH 470 µH 100 µH 100 47 µH 10 µH 10 1 1 470 µH 100 µH 100 47 µH 10 µH 10 4.7 µH 0.1 1000 µH 1000 Inductance (µH) Inductance (µH) 1000 10 Current (A) 100 1 4.7 µH 0.01 US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 0.1 1 10 Frequency (MHz) Document 704-3 Revised 04/05/13 © Coilcraft Inc. 2016 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.