KCC Quizzes AQQ303 about the radius of a circle
1. Quote of the month: "When I die, I want to die like my grandfather who died peacefully in his sleep. Not screaming like all the passengers in his car" - Will Rogers
2. Quiz AQQ304 about finding the radius of a circle
Good luck, and try to be
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August Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Important: Read the blog first . The quiz questions are all based on the content of the blog:
Stay in the loop and win! Read the blog Current Output Driving Industrial Loops , then take our quick five-question quiz for a chance to win a gift card
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Dear community,
I have some difficulties in correctly understanding and using the VDMOS model in order to correctly set the rise and fall time, as well as the thermal properties via the parameters.
The following parameters are given for my desired simple model: Fall time, rise time, RDS(on), UF0 (inverse diode forward voltage), Rb (diode resistance) and thermal semiconductor resistance. How can I set these specified values via the parameters of the VDMOS? For example, I know that the rise and fall times are functions of the input and output capacities, but I don't know how to parameterize the capacities in order to achieve the desired behavior (roughly).
Furthermore, I am not sure how I can connect the SOAtherm-HeatSink model to my VDMOS in order to determine the semiconductor temperature. I don't have the SOAtherm-NMOS model in my LTspice version.
If you could help me with these problems, I would be very grateful to you!
Best Regards
Falk
GenevaCooper - Moved from StudentZone (Analog Dialogue) to Other Products (EN). Post date updated from Friday, January 10, 2020 8:41 AM UTC to Monday, June 30, 2025 3:35 PM UTC to reflect the move.
GenevaCooper - Moved from Other Products (EN) to LTspice. Post date updated from Monday, June 30, 2025 3:35 PM UTC to Monday, June 30, 2025 3:38 PM UTC to reflect the move.
I'm not the expert but happened to be reading this discussion:
Perhaps it answers some of your questions?
-Mark