Document 1308-1
Coupled Inductors
MSD1514
• Excellent coupling coefficient (k
≥
0.97)
• Ideal for use in a variety of circuits including flyback, multi-
output buck, SEPIC, Zeta, and
Ćuk.
• High inductance, high efficiency and excellent current handling.
• In SEPIC topologies, the required inductance for each winding
is half the value needed for two separate inductors, allowing
selection of a part with lower DCR and higher current handling.
+
D
+
L1
V
IN
C
SW
L2
C
V
OUT
–
–
Typical Flyback Converter
+
C
V
OUT
AUX
Core material
Ferrite
Core and winding loss
Go to online calculator
Environmental
RoHS compliant, halogen free
Terminations
RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight:
9.0 – 11.8 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 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
175/13″ reel; Plastic tape: 32 mm wide, 0.5 mm thick,
24 mm pocket spacing, 14.3 mm pocket depth
PCB washing
Tested with pure water or alcohol only. For other solvents,
see
Doc787_PCB_Washing.pdf.
L2
+
V
IN
SW
D
D
–
+
L1
C
V
OUT
–
–
Typical Buck Converter with auxiliary output
+
L1
V
IN
D
C1
Q
+
C
V
OUT
C
L2
–
Typical SEPIC schematic
–
+
Q
V
IN
+
C1
L2
D
C
V
OUT
C
L1
–
Typical Zeta schematic
–
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 1308-1
Revised 05/06/16
© Coilcraft Inc. 2018
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 1308-2
MSD1514 Coupled Inductors
Part number
1
MSD1514-252ME_
MSD1514-472ME_
MSD1514-103ME_
MSD1514-123ME_
MSD1514-153ME_
MSD1514-223ME_
MSD1514-273ME_
MSD1514-333ME_
MSD1514-473ME_
MSD1514-683ME_
MSD1514-104KE_
MSD1514-224KE_
MSD1514-334KE_
MSD1514-474KE_
MSD1514-105KE_
Inductance
2
DCR (Ohms)
3
(µH)
typ
max
2.5 ±20%
0.010 0.012
4.7 ±20%
0.012 0.014
10 ±20%
0.015 0.018
12 ±20%
0.018 0.022
15 ±20%
0.024 0.028
22 ±20%
0.031 0.036
27 ±20%
0.034 0.039
33 ±20%
0.045 0.052
47 ±20%
0.065 0.075
68 ±20%
0.078 0.090
100 ±10% 0.115 0.126
220 ±10% 0.261 0.287
330 ±10% 0.334 0.367
470 ±10% 0.500 0.550
1000 ±10% 1.12
1.25
SRF Coupling Leakage
typ
4
coefficient inductance
(MHz)
typ
typ (µH)
34.0
0.97
0.20
25.0
0.98
0.20
16.5
0.99
0.40
14.5
0.99
0.40
11.0
>0.99
0.42
10.0
>0.99
0.45
8.50
>0.99
0.45
7.20
>0.99
0.45
5.60
>0.99
0.55
5.20
>0.99
0.55
3.80
>0.99
0.55
2.30
>0.99
0.70
2.10
>0.99
0.80
1.65
>0.99
1.2
1.10
>0.99
2.0
10%
drop
25.0
19.5
13.4
12.2
10.9
9.00
8.14
7.40
6.20
5.10
4.20
2.85
2.33
1.95
1.34
Isat
(A)
5
20%
drop
28.0
21.8
15.0
13.7
12.2
10.1
9.13
8.20
6.90
5.70
4.75
3.20
2.61
2.20
1.50
30%
drop
30.5
23.7
16.2
14.8
13.3
11.0
9.90
9.00
7.50
6.20
5.15
3.50
2.83
2.40
1.63
Irms
(A)
both
one
windings
6
winding
7
5.1
7.8
4.5
7.6
4.0
6.8
3.7
6.6
3.4
5.8
3.0
5.1
2.95
4.7
2.55
3.9
2.20
3.45
2.00
3.20
1.65
2.50
1.10
1.70
0.98
1.55
0.77
1.30
0.55
0.77
1. When ordering, please specify
termination
and
packaging
codes:
MSD1514-105KED
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 (175 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 the specified amount 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.
Click for temperature derating information.
7. 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.
Click for temperature derating information.
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.
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
.
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 1308-2
Revised 05/06/16
© Coilcraft Inc. 2018
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 1308-3
MSD1514 Coupled Inductors
Typical L vs Current
10,000
Typical L vs Frequency
10,000
1000 µH
470 µH
220 µH
100 µH
47 µH
100
22 µH
10 µH
10
4.7 µH
1000
1000 µH
470 µH
220 µH
1000
Inductance (µH)
100
100 µH
47 µH
22 µH
10
10 µH
4.7 µH
1
Inductance (µH)
100
0.1
1
10
1
0.1
1
10
100
Current (A)
Frequency (MHz)
0.590 ±0.0197
15,0 ±0,50
123
0.590 ±0.0197
15,0 ±0,50
Dash number
Dot indicates pin1
1
L1
3
2
L2
4
X
Internal code
1
:
1
0.559
max
*
14,20
0.012
min
0,30
0.130
3,3
0.074
1,9
0.091
2,3
0.165
4,2
3
4
2
1
0.220
5,6
4
3
1
2
0.236
6,0
0.311
7,9
0.3
8,2
Recommended
Land Pattern
*
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).
Dimensions are in
inches
mm
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 1308-3
Revised 05/06/16
© Coilcraft Inc. 2018
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.
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