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CPWR-AN17, Rev -, 05-2016
Copyright © 2016 Cree, Inc. All rights reserved.
The information in this document is subject to change without notice.
Cree, the Cree logo, and Zero Recovery are registered trademarks of Cree, Inc.
oscilloscopes with the probe attenuation set to x100. If the user selects a different resistor, the user
should ensure that the resistor has minimal insertion inductance.
Figure 12. SDN-414-01 (sold separately)
Due to the fast switching speeds associated with Cree SiC MOSFETs, the following steps must be
followed closely to yield the most accurate results possible:
Scope probes measuring V
DS
and V
GS
must have minimal loop area between the signal and
ground.
The oscilloscope probes measuring V
DS
and I
DS
must be properly deskewed.
Bulk capacitance may need to be added to the board to minimize DC link voltage sag during
two-pulse measurements. The amount will vary based on desired current level and pulse
width.
Figure 14 shows a two-pulse setup. Figure 15 shows the waveforms measured with this two-
pulse setup.
