The following table shows the Augmented settings for Turn-Off measurements.
Table 2-4. Parameters Set in Software for Turn-Off Measurements
Voltage Level
Time
RGon
RGoff
Turn-Off Step 1
3.5V
200 ns
4Ω
4Ω
Turn-Off Step 2
2.0V
100 ns
The following results were obtained during the testing:
No cross conduction observed on VGS Signal as
compared to the waveform of without Augmented setting.
The voltage overshoot is reduced from 249V to 107V.
The Eoff losses are increased from 128 μJ to 328 μJ.
The following figures show the effect and the oscilloscope waveform for with and without three-level Turn-Off Augment measurement settings, with the Rgoff value set to 4Ω.Figure 2-20. Without Turn-Off Augmented Setting
Figure 2-21. With Turn-Off Augmented Setting
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