MSD1260-472ML COILCRAFT | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 3

Technical content

© Coilcraft, Inc. 2010 Specifications subject to change without notice. Please check our website for latest information. Document 528-1 Document 528-1 Revised 12/05/08 Coupled Inductors – MSD1260 Dimensions are in inches mm The excellent coupling coefficient (k ≥ 0.94) makes the MSD1260 series of coupled inductors ideal for use in SEPIC applications. In SEPIC topologies, the required inductance for each winding in a coupled inductor is half the value needed for two separate inductors, allowing selection of a part with lower DCR and higher current handling. These parts provide high inductance, high efficiency and excellent current handling in a rugged, low cost part. They are also well suited for use as a VRM inductors in high-current DC-DC converters and VRM/ VRD controllers. They can also be used as two single inductors con- nected in series or parallel, as a common mode choke or as a 1 : 1 transformer. Core material Ferrite Terminations RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. Weight: 2.8 – 3.2 g Ambient temperature –40°C to +85°C with Irms current, +85°C to +125°C with derated current Storage temperature Component: –40°C to +125°C. Packaging: –40°C to +80°C Winding to winding isolation 500 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 500/13″ reel; Plastic tape: 24 mm wide, 0.35 mm thick, 16 mm pocket spacing, 6.6 mm pocket depth PCB washing Only pure water or alcohol recommended Recommended Land Pattern 0.217 5,5 0.177 4,5 0.157 4,0 0.079 2,0 1 2 L1 L2 123 X 0.197 5,0 0.059 1,5 0.197 5,0 0.138 3,5 0.484 12,3 max 0.484 12,3 max Dash number Internal code 0.236 ±0.008 6,0 ±0,2 Parts manufactured prior to Sept. 2007 were marked with only the dash number. Dot indicates pin1 For SEPIC and other

Applications

Refer to Application Note, Document 639, “Selecting Coupled Inductors for SEPIC Applications”

© Coilcraft, Inc. 2010 Specifications subject to change without notice. Please check our website for latest information. Coupled Inductors for SEPIC – MSD1260 Series Document 528-2 Revised 12/05/08 Document 528-2 Irms (A) Part Inductance 2 DCR max3 SRF typ4 Isat5 both one number1 (µH) (Ohms) (MHz) (A) windings 6 winding7 1. When ordering, please specify termination and packaging codes: MSD1260-105KLD 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 =1 3″ 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. DC current, at which the inductance drops 30% (typ) from its value without current. It is the sum of the current flowing in both windings. 6. Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. See temperature rise calculation. 7. Maximum current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. See temperature rise calculation. 8. 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. Temperature rise calculation based on specified Irms Temperature rise ( t) = Winding power loss × 55.6°C WΔ Δt = × 55.6°C W( + ) × DCRIIL1 Winding power loss = ( + ) × DCRIIL1 Example 1. MSD1260-153ML (Equal current in each winding) Winding power loss = (2.06 +2.06 ) × 0.085 = 0.721 W t = 0.721 W × 55.6°C W = 40°C Δ Example 2. ( = 2.4 A, Winding p MSD1260-153ML = 1.3 A)IIL1 L2 22ower loss = (2.4 +1.3 ) × 0.085 = 0.633 W t = 0.633 W × 55.6°C W = 35.2°CΔ 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. Visit www.coilcraft.com/coupledloss.

© Coilcraft, Inc. 2010 Specifications subject to change without notice. Please check our website for latest information. Coupled Inductors for SEPIC – MSD1260 Series Document 528-3 Revised 12/05/08 Typical L vs FrequencyTypical L vs Current Document 528-3 100 1000 10000 0.1 1 10010 Inductance (µH) Current (A) -104 -103 -472 -473 -105 -474 100 1000 10000 0.01 0.1 101 Inductance (µH) Frequency (MHz) -104 -103 -472 -473 -105 -474 Current Derating -40 -20 0 20 40 60 80 100 140 120 Ambient temperature (°C) Percent of rated current 120 110 100 Isat Irms 25°C