SpeedFit™ Design Simulator
Simulate and evaluate the performance of SiC-based power circuits and determine the right SiC device in seconds.
Start a SimulationSpeed Val Kit Double Pulse Test Current Measurement
Dear Wolfspeed Team,
I am finding it challenging to get an accurate current measurement on the SpeedVal Kit Evaluation Board.
For my setup, My load inductor value is 53uH, DC Bus Voltage is 200V and my switching period is 3uS i.e 333KHZ with a duty cycle of 0.6% i.e T_on (1.8uS). From the mathematical calculation the Id value should be about 6.84Amps at the falling edge of the first pulse (Isw = (Vds*T_on1) / L).
However, my current value is about 213mA. As can be seen from the attached images, I use a simple BNC-to-BNC cable. At first I noticed that the current waveform was inverted by default, I had to use the scope invert function to invert the current waveform.
Please is there anything that I am not doing right? I need your valued suggestion. I purchased the SpeedVal Kit with three different Wolfspeed Daughter cards for my analysis including the surface mount discrete products.
Kind regards,
