SPICE

Document 267
SPICE Model – LPS3010
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 LPS3010 Power Inductors
Part number
LPS3010-681
LPS3010-102
LPS3010-152
LPS3010-182
LPS3010-222
LPS3010-332
LPS3010-472
LPS3010-562
LPS3010-682
LPS3010-822
LPS3010-103
LPS3010-123
LPS3010-153
LPS3010-183
LPS3010-223
LPS3010-333
LPS3010-473
LPS3010-683
LPS3010-104
LPS3010-124
LPS3010-154
LPS3010-184
LPS3010-224
LPS3010-334
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
100
0.1
100
0.1
100
0.1
100
0.1
100
0.1
70
0.1
60
0.1
50
0.1
30
0.1
30
0.1
20
0.1
20
0.1
20
0.1
20
0.1
10
0.1
10
0.1
10
LVAR Coefficients
⏲)
R1 (⏲
400
190
210
140
210
140
82
225
110
150
75
75
125
135
220
275
300
300
360
400
600
1000
600
2500
⏲)
R2 (⏲
0.080
0.085
0.120
0.150
0.220
0.220
0.300
0.400
0.450
0.500
0.540
0.700
0.950
1.00
1.20
2.00
3.20
3.50
5.25
6.10
9.15
10.1
12.5
18.5
C (pF)
0.812
1.720
0.852
1.600
1.230
0.874
0.856
1.220
0.983
0.970
1.150
1.205
1.251
1.087
1.002
1.170
1.640
1.640
1.154
1.357
1.496
1.450
1.550
1.250
k1
1.00E-06
1.00E-06
1.00E-04
8.00E-05
8.00E-05
1.00E-04
2.20E-04
1.00E-05
1.00E-04
1.00E-05
1.00E-04
1.40E-04
1.00E-06
1.40E-04
1.00E-06
1.00E-05
1.00E-06
1.00E-06
2.00E-04
1.10E-03
1.10E-03
1.30E-03
1.00E-04
1.10E-03
k2
0.140
0.173
0.320
0.454
0.495
0.768
0.980
1.44
1.76
2.36
2.42
3.10
5.05
5.51
6.68
11.0
19.0
22.5
35.0
54.0
46.2
50.0
75.0
66.0
k3
0.68
1.0
1.5
1.8
2.2
3.3
4.7
5.6
6.8
8.2
10
12
15
18
22
33
47
68
100
120
150
180
220
330
Specifications subject to change without notice.
© Coilcraft, Inc. 2006
k4
0.016
0.026
0.034
0.045
0.048
0.080
0.118
0.135
0.118
0.200
0.260
0.270
0.245
0.160
0.194
0.261
0.274
0.410
0.333
0.490
1.07
1.13
1.07
1.07
k5
9.80E-06
9.80E-06
9.60E-06
9.80E-06
9.80E-06
9.90E-06
9.80E-06
1.00E-05
9.90E-06
9.96E-06
9.96E-06
9.93E-06
9.98E-06
9.93E-06
9.95E-06
9.96E-06
1.00E-05
1.00E-05
1.00E-05
1.00E-05
1.00E-05
1.00E-05
1.02E-05
1.01E-05
Document 267-50 Revised 08/29/06