MSD1048

Document 1190-1
Coupled Inductors MSD1048
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.
+
+
D
L1
C
L2
VOUT
C
VIN
–
SW
–
Typical Flyback Converter
D
L2
+
VOUT
C
AUX
–
0.406
max
10,3
0.406
max
10,3
123
X
+
Dot indicates pin1
Dash number
Internal code
+
VIN
1
2
L1
L1
D
SW
–
–
Typical Buck Converter with auxiliary output
L2
4
3
D
+
0.189 ±0.008*
4,8 ±0,2
L1
Recommended
Land Pattern
0.118
3,0
3
4
2
0.228
5,8
2
1
0.079
2,0
0.039
1,0
* For optional tin-lead and tin-silver-copper
0.094
2,4
1
0.213
5,4
3
VIN
C
4
L2
C
+
Q
–
VOUT
–
Typical SEPIC schematic
+
VIN
0.049
1.25
+
C1
Q
–
0.130
3,3
VOUT
C
C
L2
C1
L1
D
Typical Zeta schematic
C
VOUT
–
terminations, dimensions are for the mounted
part. Dimensions before mounting can be
an additional 0.012 inch (0,3 mm).
Dimensions are in
inches
mm
Document 1190-1 Revised 11/09/15
Document 1190-2
Coupled Inductors – MSD1048 Series
Irms (A)
CouplingLeakage
Part
Inductance2 DCR max3 SRF typ4coefficient Inductance5 Isat6both one
number1
(µH)
(Ohms)
(MHz)
typ
typ (µH)
(A)
windings7 winding8
MSD1048-222NE_ 2.2 ±30%
MSD1048-103ME_ 10 ±20%
MSD1048-223ME_ 22 ±20%
MSD1048-473ME_ 47 ±20%
MSD1048-683ME_ 68 ±20%
0.019
0.053
0.098
0.208
0.297
65
27
17
12
9.0
0.97
>0.99
>0.99
>0.99
>0.99
0.30
0.40
0.45
0.50
0.55
9.1
4.3
2.9
2.0
1.7
2.4
1.5
1.3
1.1
1.0
3.4
2.1
1.9
1.6
1.4
MSD1048-104ME_ 100 ±20%
MSD1048-224KE_ 220 ±10%
0.387
0.840
7.3
4.8
>0.99
>0.99
0.80
1.0
1.3
0.90
0.85
0.62
1.2
0.87
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 windings.
7. Equal current when applied to each winding simultaneously that causes
a 40°C temperature rise from 25°C ambient. This information is for reference 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 temperature rise from 25°C ambient. This information is for reference only
and does not represent absolute maximum ratings. To predict temperature 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.
Document 1190-2 Revised 11/09/15
Document 1190-3
Coupled Inductors – MSD1048 Series
L vs Current
L vs Frequency
1000
1000
220 µH
100
Inductance (µH)
Inductance (µH)
220 µH
100 µH
68 µH
47 µH
22 µH
10
10 µH
100 µH
68 µH
47 µH
100
22 µH
10 µH
10
2.2 µH
1
0.01
1
0.1
Current (A)
10
2.2 µH
1
0.1
1
10
100
Frequency (MHz)
Document 1190-3 Revised 11/09/15