SPICE

Document 267
SPICE Model – SER2000
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.
• k3, k4, and k5 are shown in the accompanying table.
• RVAR2 is the resistance in Ohms
Note: The log function in the following equation is the
natural logarithm, base e, not base 10.
The value of the frequency-dependent inductance LVAR
is calculated from:
LVAR = k3 − k4
* LOG (k5 * f)
• f is the frequency in Hz
• LVAR is the inductance in µH
• LOG is the natural LOG (base e)
Disclaimer
RVAR2
VAR
C
R2
RVAR1
VAR
R1
LVAR
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. 2007
Document 267-1 Revised 08/03/07
Document 267
SPICE Model for Coilcraft SER2000 Power Inductors
Part number
SER2009-301
SER2010-301
SER2009-501
SER2010-501
SER2011-501
SER2009-601
SER2010-601
SER2011-601
SER2012-601
SER2009-681
SER2010-681
SER2011-681
SER2012-681
SER2013-681
SER2009-801
SER2010-801
SER2011-801
SER2012-801
SER2013-801
SER2014-801
SER2009-901
SER2010-901
SER2011-901
SER2012-901
SER2013-901
SER2014-901
SER2009-102
SER2010-102
SER2011-102
SER2012-102
SER2013-102
SER2014-102
SER2009-122
SER2010-122
SER2011-122
SER2012-122
SER2013-122
SER2014-122
SER2009-202
SER2010-202
SER2011-202
SER2012-202
SER2013-202
SER2014-202
Frequency limit
of model (MHz)
Lower Upper
0.1
100
0.1
100
0.1
50
0.1
70
0.1
100
0.1
50
0.1
80
0.1
100
0.1
100
0.1
40
0.1
60
0.1
90
0.1
90
0.1
90
0.1
30
0.1
60
0.1
80
0.1
80
0.1
80
0.1
90
0.1
30
0.1
40
0.1
70
0.1
70
0.1
70
0.1
70
0.1
40
0.1
50
0.1
70
0.1
70
0.1
70
0.1
70
0.1
30
0.1
40
0.1
60
0.1
60
0.1
60
0.1
60
0.1
20
0.1
30
0.1
40
0.1
40
0.1
50
0.1
50
LVAR Coefficients
⏲)
R1 (⏲
200
110
275
170
100
275
170
145
71
230
190
172
73
45
340
173
157
97
60
53
260
300
200
160
65
50
220
220
215
94
82
70
235
350
165
150
77
70
245
325
475
200
145
125
⏲)
R2 (⏲
5.88E-04
8.52E-04
5.88E-04
8.52E-04
1.13E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
1.60E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
1.60E-03
1.83E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
1.60E-03
1.83E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
1.60E-03
1.83E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
1.60E-03
1.83E-03
5.88E-04
8.52E-04
1.13E-03
1.35E-03
1.60E-03
1.83E-03
C (pF)
15.7
4.40
19.0
8.06
3.98
19.0
7.02
3.92
4.00
23.0
8.77
4.50
5.10
4.58
30.0
8.79
6.00
4.96
4.90
4.13
31.3
9.93
5.09
4.20
5.01
4.86
32.3
10.3
4.82
6.10
5.13
4.94
27.0
9.52
6.50
5.45
5.45
4.86
45.0
13.3
6.20
6.40
5.83
5.26
k1
2.70E-05
2.70E-05
2.70E-05
6.60E-05
1.00E-04
2.70E-05
4.80E-05
4.20E-05
9.00E-05
6.00E-05
6.00E-05
6.00E-05
1.00E-04
1.00E-04
3.30E-05
6.00E-05
1.10E-04
1.10E-04
1.10E-04
9.00E-05
8.00E-05
1.00E-04
1.59E-04
1.28E-04
1.90E-04
1.06E-04
4.50E-05
4.50E-05
9.80E-04
9.80E-05
1.70E-04
1.70E-04
8.40E-05
1.23E-04
1.23E-04
1.23E-04
1.23E-04
1.80E-04
3.50E-05
3.50E-05
7.50E-05
1.25E-04
2.60E-04
2.60E-04
k2
0.064
0.053
0.070
0.085
0.085
0.070
0.091
0.097
0.117
0.079
0.105
0.116
0.140
0.170
0.108
0.098
0.144
0.158
0.186
0.220
0.116
0.144
0.131
0.174
0.200
0.248
0.115
0.126
0.126
0.184
0.218
0.288
0.096
0.141
0.155
0.206
0.226
0.274
0.160
0.194
0.258
0.256
0.305
0.386
k3
0.30
0.30
0.50
0.50
0.50
0.60
0.60
0.60
0.60
0.68
0.68
0.68
0.68
0.68
0.80
0.80
0.80
0.80
0.80
0.80
0.90
0.90
0.90
0.90
0.90
0.90
1.0
1.0
1.0
1.0
1.0
1.0
1.2
1.2
1.2
1.2
1.2
1.2
2.0
2.0
2.0
2.0
2.0
2.0
Specifications subject to change without notice.
k4
4.65E-03
7.60E-04
1.63E-03
1.23E-03
1.23E-03
1.63E-03
1.35E-03
2.63E-03
2.63E-03
1.23E-03
1.23E-03
1.23E-03
2.63E-03
2.63E-03
2.20E-04
2.20E-04
7.43E-06
7.43E-04
5.00E-03
5.00E-03
4.29E-03
1.02E-03
4.26E-03
1.00E-03
7.51E-03
3.00E-03
1.65E-03
7.60E-03
2.00E-03
6.21E-03
3.19E-03
1.00E-02
3.85E-03
3.85E-03
3.85E-03
4.66E-03
4.66E-03
1.00E-02
2.30E-02
1.20E-02
5.13E-03
1.00E-02
1.00E-02
1.00E-02
k5
8.00E-06
8.00E-06
6.00E-06
6.00E-06
4.00E-06
6.00E-06
6.82E-05
6.82E-06
6.82E-06
3.85E-06
6.20E-06
6.20E-06
7.50E-06
7.50E-06
3.15E-07
3.15E-07
2.00E-06
2.00E-06
8.00E-06
8.00E-06
7.00E-06
2.15E-06
5.43E-06
2.00E-06
7.76E-06
7.00E-06
4.00E-06
7.80E-06
4.00E-05
8.00E-06
6.00E-06
8.00E-06
4.30E-06
5.17E-06
5.17E-06
6.25E-06
7.50E-06
7.50E-06
8.38E-06
8.38E-06
6.27E-06
6.82E-06
6.20E-06
6.20E-06
Document 267-28 Revised 09/13/04