SPICE

Document 267
SPICE Model – ME3220
This lumped-element (SPICE) model data simulates the
frequency-dependent behavior of Coilcraft power inductors within the frequency range shown in the accompanying table for each individual inductor.
The data represents de-embedded measurements, as
described below. Effects due to different customer circuit board traces, board materials, ground planes or
interactions with other components are not included and
can have a significant effect when comparing the simulation to measurements of the inductors using other
production verification instruments and fixtures.
The value of the frequency-dependent variable resistor
RVAR1 is calculated from:
RVAR1 = k1 *
• k1 is shown for each value in the accompanying table.
• f is the frequency in Hz
• RVAR1 is the resistance in Ohms
The value of the frequency-dependent variable resistor
RVAR2 is calculated from:
RVAR2 = k2 *
Lumped Element Modeling Method
• k2 is shown for each value in the accompanying table.
Measurements were made using a 50 Ohm impedance
analyzer. Fixture compensation was performed to remove fixture effects. No DC bias current was applied in
any of the measurements. The lumped element values
were determined by optimizing the simulation model to
an average of the measurements. This method results in
a model that represents as closely as possible the
typical frequency-dependent behavior of the component within the model frequency range.
• f is the frequency in Hz
The equivalent lumped element model schematic is
shown below. Each model should be analyzed only at
the input and output ports. Conclusions based on individual lumped element values may be erroneous.
RVAR2
VAR
C
R2
RVAR1
VAR
R1
LVAR
• RVAR2 is the resistance in Ohms
The value of the frequency-dependent inductance LVAR is
calculated from:
LVAR = k3 − k4 * LOG (k5 * f)
• k3, k4, and k5 are shown in the accompanying table.
• f is the frequency in Hz
• LVAR is the inductance in µH
Disclaimer
Coilcraft makes every attempt to provide accurate measurement data and software, representative of our components, in a usable format. Coilcraft, however, disclaims
all warrants relating to the use of its data and software,
whether expressed or implied, including without limitation
any implied warranties of merchantability or fitness for a
particular purpose. Coilcraft cannot and will not be liable
for any special, incidental, consequential, indirect or
similar damages occurring with the use of the data and/
or software.
Specifications subject to change without notice.
© Coilcraft, Inc. 2005
Document 267-1 Revised 02/19/03
Document 267
SPICE Model for Coilcraft ME3220 Power Inductors
Part number
ME3220-102
ME3220-152
ME3220-222
ME3220-332
ME3220-472
ME3220-562
ME3220-682
ME3220-822
ME3220-103
ME3220-123
ME3220-153
ME3220-183
ME3220-223
ME3220-273
ME3220-333
ME3220-393
ME3220-473
ME3220-563
ME3220-683
ME3220-823
ME3220-104
Frequency limit
of model (MHz)
Lower Upper
0.1
100
0.1
100
0.1
100
0.1
100
0.1
100
0.1
100
0.1
100
0.1
90
0.1
90
0.1
80
0.1
80
0.1
70
0.1
70
0.1
70
0.1
70
0.1
70
0.1
70
0.1
70
0.1
60
0.1
50
0.1
40
LVAR Coefficients
⏲)
R1 (⏲
34
35
37
31
34
27
24
29
27
32
31
30
23
10
10
10
7
1
2
52
55
⏲)
R2 (⏲
0.058
0.068
0.104
0.138
0.190
0.200
0.270
0.290
0.434
0.470
0.520
0.696
0.787
1.19
1.27
1.38
1.80
2.10
2.30
3.00
3.50
C (pF)
1.76
1.48
1.74
1.52
1.74
1.57
1.56
1.62
1.32
1.64
1.56
1.88
1.68
1.66
1.92
1.81
1.84
2.18
1.99
1.95
1.82
k1
1.00E-06
1.00E-06
1.00E-06
1.50E-05
2.50E-05
6.00E-05
9.00E-05
1.75E-04
1.00E-04
1.50E-04
2.00E-04
5.00E-05
1.50E-04
6.00E-05
6.00E-05
5.00E-04
4.00E-04
1.50E-04
6.00E-04
2.50E-04
2.00E-04
k2
0.303
0.530
0.822
1.27
1.67
1.84
2.45
2.86
3.21
4.10
5.23
6.25
6.63
7.48
8.95
11.1
14.1
15.0
15.8
21.5
16.1
k3
1.0
1.5
2.2
3.3
4.7
5.6
6.8
8.2
10
12
15
18
22
27
33
39
47
56
68
82
100
Specifications subject to change without notice.
© Coilcraft, Inc. 2005
k4
0.019
0.038
0.048
0.087
0.111
0.135
0.135
0.156
0.156
0.187
0.263
0.245
0.345
0.328
0.380
0.525
0.670
0.898
1.040
1.260
1.530
k5
9.80E-06
9.90E-06
9.90E-06
9.95E-06
9.95E-06
9.95E-06
9.95E-06
9.95E-06
9.95E-06
9.95E-06
9.95E-06
9.98E-06
9.95E-06
9.97E-06
9.97E-06
9.90E-06
9.95E-06
9.98E-06
9.94E-06
9.99E-06
1.00E-05
Document 267-44 Revised 04/01/05