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Document 1190-1 Revised 11/09/15 Coupled Inductors MSD1048 Dimensions are in inches mm For Flyback, SEPIC, Zeta and other Applications

  • Tight coupling (k ≥ 0.97)
  • 200 V isolation
  • Ideal for use in a variety of circuits including flyback, multi-output buck, SEPIC, Ćuk and Zeta.
  • High efficiency and excellent current handling
  • Can also be used as two single inductors connected in series or parallel, as a common mode choke or as a 1 : 1 transformer. L1 L2 + + D C C Typical Flyback Converter VOUT VIN SW D D C C SW Typical Buck Converter with auxiliary output VOUT VOUTAUX VIN Typical Zeta schematic VOUTVIN L1 L2Q C1 CC D Typical SEPIC schematic VOUTVIN L2Q CC D Recommended Land Pattern 0.130 3,3 0.213 5,40.094 2,4 0.049 1.25 1 2 L1 L2 123 X 0.118 3,0 0.039 1,0 0.228 5,8 0.079 2,0 0.406 10,3 max 0.406 10,3 max Dash number Internal code 0.189 ±0.008 4,8 ±0,2 Dot indicatespin1 For optionaltin-leadand tin-silver-copper terminations, dimensionsare for the mounted part. Dimensionsbefore mountingcanb e an additional0.012 inch (0,3 mm).

Coupled Inductors – MSD1048 Series Document 1190-2 Revised 11/09/15 Document 1190-2 Coupling Leakage Irms (A) Part Inductance2 DCR max3 SRF typ4 coefficient Inductance5 Isat6 both one number 1 (µH) (Ohms) (MHz) typ typ (µH) (A) windings7 winding8 1. When ordering, please specify termination and packaging codes: MSD1048-224KED Termination: E = RoHS compliant matte tin over nickel over phos bronze. Special order: Q = RoHS tin-silver-copper (95.5/4/0.5) or P = non-RoHS tin-lead (63/37). Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic tape. (800 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 25°C that causes a 30% (typ) inductance drop from its value without current. It is the sum of the current flowing in both wind- ings. 7. Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. This information is for refer- ence only and does not represent absolute maximum ratings. To predict temperature rise go to online calculator . 8. Maximum current when applied to one winding that causes a 40°C tem- perature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. To predict tempera- ture rise go to online calculator . 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. 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. 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: 1.5– 1.8 g Ambient temperature –40°C to +85°C with (40°C rise) Irms current. Maximum part temperature +125°C (ambient + temp rise). Storage temperature Component: –40°C to +125°C. Tape and reel packaging: –40°C to +80°C Winding-to-winding and winding-to-core isolation 200 Vrms 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 800/13″ reel Plastic tape: 24 mm wide, 0.35 mm thick, 16 mm pocket spacing, 5.1 mm pocket depth PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf.

Coupled Inductors – MSD1048 Series Document 1190-3 Revised 11/09/15 Document 1190-3 L vs FrequencyL vs Current 10 µH 22 µH 47 µH 68 µH 100 µH 220 µH 2.2 µH 100 1000 0.1 1 10010 Inductance (µH) Frequency (MHz) 10 µH 22 µH 47 µH 68 µH 100 µH 220 µH 2.2 µH 100 1000 0.01 0.1 101 Inductance (µH) Current (A)