Document 621-1 Shielded Coupled Inductors MSD7342 Tight coupling (k 0.97) and 200 V isolation make the MSD7342 series of coupled inductors ideal for use in a variety of circuits including flyback, multi-output buck and SEPIC. They provide high inductance, high efficiency and excellent current handling in a rugged, low cost part. Can also be used as two single inductors connected in series or parallel, as a common mode choke or as a 1 : 1 transformer. + + D C V L1 L2 OUT C V IN SW Typical Flyback Converter + D V OUT C AUX L2 ++ 0.295 max 7,5 L1 V Dotindicates V C OUT D IN pin1 SW 0.295 max Typical Buck Converter with auxiliary output 7,5 123 1 2 L1 L2 D ++ 4 3 L1 C1 V C Q L2 C V OUT IN 0.181 max 4,6 0.028 Typical SEPIC schematic Recommended 0,7 Land Pattern 0.091 0.110 ++ 2,3 2,8 L2 C1 0.083 Q 2,1 V D CC OUT V L1 3 4 2 1 IN 0.150 0.130 3,8 3,3 3 4 2 1 Ifboardtraces areruninthese Typical Zeta schematic areas,consider maskingthemto 0.043 0.063 preventshorting. 1,10 1,6 inches Dimensions are in mm Specifications subject to change without notice. Document 621-1 Revised 11/09/15 US +1-847-639-6400 sales coilcraft.com Please check our website for latest information. 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 621-2 Shielded Coupled Inductors MSD7342 Series 6 Isat (A) Irms (A) Coupling Leakage 2 3 4 5 Inductance DCR max SRF typ coefficient L typ 10% 20% 30% both one 1 7 8 Part number 20% (H) (Ohms) (MHz) typ (H) drop drop drop windings winding MSD7342-252ML 2.5 0.033 55 0.97 0.14 6.0 6.2 6.3 2.17 3.06 MSD7342-332ML 3.3 0.037 43 0.99 0.09 5.2 5.3 5.4 2.05 2.89 MSD7342-472ML 4.7 0.051 35 0.99 0.11 4.1 4.3 4.6 1.74 2.46 MSD7342-562ML 5.6 0.063 32 0.99 0.09 3.9 4.1 4.2 1.57 2.22 MSD7342-682ML 6.8 0.070 30 0.99 0.14 3.7 3.8 3.9 1.49 2.10 MSD7342-822ML 8.2 0.075 27 0.98 0.25 3.3 3.4 3.5 1.44 2.03 MSD7342-103ML 10 0.100 22 0.98 0.30 2.8 2.9 3.0 1.24 1.76 MSD7342-123ML 12 0.120 20 0.98 0.36 2.5 2.6 2.7 1.14 1.61 MSD7342-153ML 15 0.130 18 0.98 0.49 2.2 2.3 2.4 1.09 1.54 MSD7342-183ML 18 0.170 15 >0.99 0.16 2.0 2.2 2.3 0.95 1.35 MSD7342-223ML 22 0.220 13.5 >0.99 0.20 1.9 2.0 2.1 0.84 1.19 MSD7342-273ML 27 0.250 12.0 >0.99 0.20 1.7 1.8 1.9 0.79 1.11 MSD7342-333ML 33 0.270 11.0 >0.99 0.15 1.5 1.6 1.7 0.76 1.07 MSD7342-393ML 39 0.380 10.0 0.99 0.70 1.3 1.4 1.5 0.64 0.90 MSD7342-473ML 47 0.420 9.5 >0.99 0.30 1.2 1.3 1.4 0.61 0.86 MSD7342-563ML 56 0.460 8.7 >0.99 0.51 1.1 1.2 1.3 0.58 0.82 MSD7342-683ML 68 0.600 7.3 >0.99 0.51 1.0 1.1 1.2 0.51 0.72 MSD7342-823ML 82 0.680 6.2 0.99 1.17 0.90 1.00 1.1 0.48 0.67 MSD7342-104ML 100 0.770 5.5 >0.99 0.96 0.80 0.92 0.98 0.45 0.63 MSD7342-124ML 120 1.03 4.5 >0.99 0.61 0.70 0.80 0.90 0.39 0.55 MSD7342-154ML 150 1.35 4.0 >0.99 0.54 0.65 0.76 0.80 0.34 0.48 MSD7342-184ML 180 1.52 3.8 >0.99 0.75 0.62 0.66 0.73 0.32 0.45 MSD7342-224ML 220 1.72 3.5 >0.99 1.43 0.59 0.62 0.66 0.30 0.42 MSD7342-274ML 270 2.41 3.3 >0.99 1.56 0.55 0.57 0.60 0.25 0.36 MSD7342-334ML 330 2.70 3.0 >0.99 1.65 0.49 0.52 0.54 0.24 0.34 MSD7342-394ML 390 3.05 2.8 0.99 4.73 0.45 0.47 0.50 0.23 0.32 MSD7342-474ML 470 4.00 2.6 0.99 5.50 0.41 0.43 0.46 0.20 0.28 MSD7342-564ML 560 4.43 2.5 >0.99 4.85 0.38 0.40 0.42 0.19 0.26 MSD7342-684ML 680 5.00 2.3 0.99 7.59 0.36 0.37 0.38 0.18 0.25 MSD7342-824ML 820 6.80 2.2 >0.99 8.01 0.30 0.32 0.35 0.15 0.21 MSD7342-105ML 1000 7.80 2.0 >0.99 8.69 0.27 0.29 0.31 0.14 0.20 1. When ordering, please specify termination and packaging codes: 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 MSD7342-105MLC value without current. It is the sum of the current flowing in both windings. Termination: L = RoHS compliant matte tin over nickel over phos bronze. 7. Equal current when applied to each winding simultaneously that causes Special order: T = RoHS tin-silver-copper a 40C temperature rise from 25C ambient. This information is for refer- (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). ence only and does not represent absolute maximum ratings. To predict Packaging: C = 7 machine-ready reel. EIA-481 embossed plastic temperature rise go to online calculator. tape (250 parts per full reel). 8. Maximum current when applied to one winding that causes a 40C B = Less than full reel. In tape, but not machine ready. temperature rise from 25C ambient. This information is for reference To have a leader and trailer added ( 25 charge), use only and does not represent absolute maximum ratings. To predict code letter C instead. temperature rise go to online calculator. D = 13 machine-ready reel. EIA-481 embossed plastic 9. Electrical specifications at 25C. tape. Factory order only, not stocked (1000 parts per Refer to Doc 639 Selecting Coupled Inductors for SEPIC Applications. full reel). Refer to Doc 362 Soldering Surface Mount Components before soldering. 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 Coupled Inductor Core and Winding Loss Calculator is half the value. When leads are connected in series, DCR is twice the This web-based utility allows you to enter frequency, peak-to-peak value. (ripple) current, and Irms current to predict temperature rise and overall 4. SRF measured using an Agilent/HP 4191A or equivalent. When leads losses, including core loss. Go to online calculator are connected in parallel, SRF is the same value. Specifications subject to change without notice. Document 621-2 Revised 11/09/15 US +1-847-639-6400 sales coilcraft.com Please check our website for latest information. Document 621-2 Revised 02/23/11 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.