MSD1278T

Document 704-1
Coupled Inductors MSD1278T
For high temperature
applications
The MSD1278T series of shielded coupled inductors was
designed specifically for high temperature applications –
up to 125°C ambient.
Tight coupling (k ≥ 0.98) and 500 V isolation make them
ideal for use in a variety of circuits including flyback, multioutput buck, SEPIC and Zeta. These parts provide high
inductance, high efficiency and excellent current handling.
They can also be used as two single inductors connected
in series or parallel or as a common mode choke.
+
+
D
L1
C
L2
VOUT
C
VIN
–
SW
–
Typical Flyback Converter
0.484
max
12,3
0.484
max
12,3
123
X
D
L2
+
VOUT
C
AUX
–
Dot indicates pin1
+
Dash number
+
VIN
L1
D
SW
VOUT
C
–
Internal code
–
Typical Buck Converter with auxiliary output
0.308 ±0.010 *
7,8 ±0,25
0.197
5,0
L1
Recommended
Land Pattern
VIN
0.217
5,5
0.197
5,0
0.138
3,5
D
+
4
2
1
2
1
3
4
0.177
4,5
* 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).
VIN
–
L1
3
2
VOUT
–
+
0.079
2,0
1
C
Typical SEPIC schematic
+
L2
C1
Q
0.059
1,5
L2
Q
–
0.157
4,0
3
C
+
C1
L1
C
D
Typical Zeta schematic
C
VOUT
–
L2
4
inches
Dimensions are in
mm
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 704-1 Revised 04/05/13
© Coilcraft Inc. 2016
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 704-2
High Temperature Coupled Inductors – MSD1278T
DCR
SRF CouplingLeakage Isat (A)6 Irms (A)
Inductance2
max3 L typ510% 20% 30% typ4coefficient
both
one
Part number1
(µH)
(Ohms) (MHz)
typ
(µH)
drop dropdrop windings7 winding8
MSD1278T-472ML_ 4.7 ±20%
MSD1278T-562ML_ 5.6 ±20%
MSD1278T-682ML_ 6.8 ±20%
MSD1278T-822ML_ 8.2 ±20%
MSD1278T-103ML_ 10 ±20%
0.040
0.046
0.048
0.055
0.058
33.0
30.0
23.0
20.0
17.0
0.98
0.98
0.98
0.98
0.98
0.22
0.23
0.22
0.34
0.34
13.90
13.38
12.10
10.30
8.80
15.20
14.86
13.56
11.52
10.00
16.36
15.74
14.20
12.20
10.66
3.16
2.87
2.81
2.76
2.56
4.47
4.06
3.98
3.90
3.62
MSD1278T-123ML_ 12 ±20%
MSD1278T-153ML_ 15 ±20%
MSD1278T-183ML_ 18 ±20%
MSD1278T-223ML_ 22 ±20%
MSD1278T-273ML_ 27 ±20%
0.062
0.072
0.080
0.096
0.120
15.0
13.0
12.0
11.0
10.0
0.98
0.99
0.99
0.99
0.99
0.36
0.41
0.37
0.41
0.43
8.20
7.40
6.50
6.00
5.80
9.18
8.36
7.38
6.80
6.56
9.74
9.03
7.86
7.26
7.02
2.48
2.30
2.18
1.99
1.78
3.50
3.25
3.08
2.81
2.52
MSD1278T-333ML_ 33 ±20%
MSD1278T-393ML_ 39 ±20%
MSD1278T-473ML_ 47 ±20%
MSD1278T-563ML_ 56 ±20%
MSD1278T-683ML_ 68 ±20%
0.150
0.161
0.180
0.190
0.210
9.5
8.5
7.5
7.0
6.5
0.99
0.99
0.99
0.99
0.99
0.56
0.64
0.70
0.76
0.88
5.50
4.70
3.70
3.60
3.50
6.10
5.26
4.34
4.18
4.04
6.52
5.60
4.60
4.50
4.32
1.59
1.54
1.45
1.41
1.35
2.25
2.18
2.05
2.00
1.90
MSD1278T-823ML_ 82 ±20%
MSD1278T-104ML_ 100 ±20%
MSD1278T-124KL_ 120 ±10%
MSD1278T-154KL_ 150 ±10%
MSD1278T-184KL_ 180 ±10%
0.280
0.300
0.410
0.460
0.510
5.0
4.5
4.3
4.1
4.0
0.99
>0.99
0.99
>0.99
>0.99
0.85
0.90
1.31
1.46
0.93
3.30
2.80
2.60
2.20
2.10
3.72
3.24
2.94
2.54
2.42
4.02
3.46
3.16
2.70
2.58
1.16
1.13
0.96
0.91
0.86
1.65
1.59
1.36
1.29
1.22
MSD1278T-224KL_ MSD1278T-274KL_ MSD1278T-334KL_ MSD1278T-394KL_ MSD1278T-474KL_ 0.690
0.900
1.02
1.12
1.53
3.4
3.1
2.9
2.7
2.2
>0.99
>0.99
0.99
>0.99
>0.99
1.54
1.17
4.14
1.64
0.25
1.90
1.70
1.50
1.40
1.30
2.16
1.94
1.70
1.60
1.50
2.28
2.10
1.84
1.70
1.60
0.74
0.65
0.61
0.58
0.50
1.05
0.92
0.86
0.82
0.70
1.69
2.29
2.55
2.87
2.0
1.7
1.4
1.3
>0.99
>0.99
>0.99
>0.99
2.68
2.11
2.39
4.28
1.20
1.00
0.900
0.850
1.34
1.08
1.04
0.948
1.46
1.22
1.18
1.05
0.47
0.41
0.39
0.37
0.67
0.58
0.55
0.52
220 ±10%
270 ±10%
330 ±10%
390 ±10%
470 ±10%
MSD1278T-564KL_ 560 ±10%
MSD1278T-684KL_ 680 ±10%
MSD1278T-824KL_ 820 ±10%
MSD1278T-105KL_ 1000 ±10%
1. When ordering, please specify termination and packaging code:
Coupled Inductor Core and Winding Loss Calculator
MSD1278T-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 =13″ 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. Leakage inductance is for L1 and is measured with L2 shorted.
6. 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.
7. Equal current when applied to each winding simultaneously that causes
a 40°C temperature rise from 25°C ambient. See temperature rise
calculation.
8. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. See temperature rise calculation.
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.
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: 3.7 – 4.4 g
Ambient temperature –40°C to +125°C with Irms current
Maximum part temperature +165°C (ambient + temp rise)
Storage temperature Component: –40°C to +165°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 500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick,
16 mm pocket spacing, 8.7 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 704-2 Revised 04/05/13
© Coilcraft Inc. 2016
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 704-3
High Temperature Coupled Inductors – MSD1278T
Typical L vs Current
Typical L vs Frequency
10000
10000
1000 µH
470 µH
100 µH
100
47 µH
10 µH
10
1
1
470 µH
100 µH
100
47 µH
10 µH
10
4.7 µH
0.1
1000 µH
1000
Inductance (µH)
Inductance (µH)
1000
10
Current (A)
100
1
4.7 µH
0.01
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
0.1
1
10
Frequency (MHz)
Document 704-3 Revised 04/05/13
© Coilcraft Inc. 2016
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.