Technical information

Easy Automotive Modules
Evaluation Kit EASYKIT AUX DRIVES (FS50R07W1E3_B11A)
Experimental Results
Application Note 34 AN2012-10
Evaluation Kit EASYKIT AUX DRIVES (FS50R07W1E3_B11A)
Figure 25 shows the measured waveforms of the IGBT (see Vce and Vge) and the short circuit current (IL).
The IGBT turns-on at 0 us. Due to the short circuit inductance the current rises relatively low. After approx
16.5 us the current is high enough that the IGBT desatures (Vce voltage rises to high values despite the
IGBT is still turned on). This desaturation is detected in the gate driving circuit, which turns-off the IGBT. The
turn-off overvoltage with <100V is relatively low. All measured values were within the specification of the
FS50R07W1E3_B11A power module.
Figure 25 Measured waveforms of the DUT during the short circuit test. See Figure 22 for
measurement points.
0 2 4 6 8 10 12 14 16 18 20
0
100
200
300
400
500
600
time [us]
Vce [V]; IL [A]
0 2 4 6 8 10 12 14 16 18 20
0
5
10
15
20
25
30
Vge [V]
Tvj=25°C