IGBT Modules - Technologies, Driver and Application (Second Edition) - page 210

As the gradient of the resistance characteristics is non-linear there are several B-values
given in the datasheet relating to different temperature values, so the real gradient can
be approximated. The example in
gives three values for 50°C, 80°C and
100°C referenced to 25°C.
Fig. 5.10
Data regarding the characteristicNTC resistance values
An example of an evaluation circuit for the NTC resistor and thus the derivation of the
actual baseplate temperature is given in chapte
5.7 Module
The section about themodule contains data regarding the dielectric strength (insulation
capability), module inductances and resistances, and the torque for the power terminals
and formounting themodule to a heatsink. Also the operation and storage temperatures
of themoduleare listedhere.
The data regarding the collector-emitter DC voltage is usually given only for high-
voltage modules (3.3kV and above) and it is referenced to a failure rate of 100 FIT
(definition of FIT s. chapter
at the voltagementioned. This makes it relevant for
the long term stability as a function of the DC-bus voltage which it needs to block
permanently. The main failure mechanism here is based on the cosmic radiation as
described in chapte
The values for clearance and creepage distances are always referenced to a module
not mounted. The influence of connecting bolts, washers and the like has to be
considered for an overall survey of the effective clearance and creepage distances
The data for the maximum junction temperature T
is a value only correct in the
stationary condition with the semiconductors not switching. For the design of an
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