Document 267
Specifications subject to change without notice.
Document 267-1 Revised 02/19/03
This lumped-element (SPICE) model data simulates the
frequency-dependent behavior of Coilcraft power induc-
tors within the frequency range shown in the accompa-
nying table for each individual inductor.
The data represents de-embedded measurements, as
described below. Effects due to different customer cir-
cuit board traces, board materials, ground planes or
interactions with other components are not included and
can have a significant effect when comparing the simu-
lation to measurements of the inductors using other
production verification instruments and fixtures.
Lumped Element Modeling Method
Measurements were made using a 50 Ohm impedance
analyzer. Fixture compensation was performed to re-
move 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 compo-
nent within the model frequency range.
The equivalent lumped element model schematic is
shown below. Each model should be analyzed only at
the input and output ports. Conclusions based on indi-
vidual lumped element values may be erroneous.
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 *
k2 is shown for each value in the accompanying table.
f is the frequency in Hz
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 H
Disclaimer
Coilcraft makes every attempt to provide accurate mea-
surement data and software, representative of our com-
ponents, 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.
CR1
R2
LVAR
RVAR
RVAR1
RVAR
RVAR2
SPICE Model – MOS6020