2ED100E12-F2_EVAL Infineon Technologies, 2ED100E12-F2_EVAL Datasheet - Page 17

• Manufacturer Part Number: 2ED100E12-F2_EVAL
• Description: Power Management IC Development Tools Eval Driver Board EconoDual
• Manufacturer: Infineon Technologies

4
The setup used for preparing this application note varies from the setup used to characterize the devices in
three aspects:
DC-link inductance:
The DC-link inductance of the setup used for these test is has a value of approximately 35 nH for all modules
investigated here in contrast to varying values between 35 nH to 80 nH used for device characterization (see
device datasheets for details). For a detailed discussion on the impact of DC-link inductance on switching
losses please refer to [2].
Gate voltage:
This Evaluation Board provides a gate voltage of -8 V for turning off and 16 V for turning on wheras
charactization is done with a driver providing +/- 15 V of gate voltage.
Gate driver output impedance:
According to IEC 60747-9 for characterization of an IGBT the driver used should resemble an ideal voltage
source as far as possible. For the Evaluation Board a driver output stage has been choosen that considers
board space as well as cost constraints. Therefore it can not provide close to zero output impedance.
All aspects discussed above have an impact on the switching speed of the module and hence also on the
switching losses. Gate resistor values have been choosen so that di/dt at turn-on compareable to
characterization has been achieved. Nevertheless small deviations in the turn-on losses persist. For the turn-
off losses there is little impact of driving conditions for trench-fieldstop IGBTs like the ME3 and ME4 devices.
For NPT IGBTs, like used in the MS4 modules, the considerations made for turn-on losses also apply for
turn-off losses.
4.1
The turn-on losses are expected to be close to the values of the datasheet of the modules. As an example
the turn-on losses for an EconoDUAL™3 FF450R12ME3 as well as for a FF450R12ME4 module are shown
in the following diagrams.
Application Note
a)
Switching losses
Turn-on losses
160
140
120
100
80
60
40
20
0
0
100
Eon @ Tj = 25°C
Eon @ Tj = 125°C
200
300
FF450R12ME3 Sw itching losses, Eon= f(Uce,Ic)
Driver board for EconoDUAL™3 and EconoPACK™+
400
Current [A]
500
17
600
700
800
900
1000
Switching losses
V1.2, 2009-08
AN2008-02
400V
500V
600V
700V
800V
400V
500V
600V
700V
800V