Hi,
im reading about measuring Rds-on of Mosfets. There are not many resources i can find on that. I only found one topic in this forum:
here. There is a paper (
APT0407), that shows some clamping circuits.
There is one thing, i dont understand in the the figure attached.
They say, that there is only a reliable measurment of about 20kHz possible due to the RC time. It seems to me, that this is wrong. My understanding is, that the delay by the RC time is only until the brown curve hits the blue curve (how i expect point B to be), which happens about 3..5us. But doesnt these 3.5us mean that it would be suitable for 280kHz?
Another question i have:
Why ist that final value not taken right after the reaction time? For me the time where they take the final value would only make sense, if that curve goes like A.
Also: Why does the brown curve slowly raise after the reaction time?
Have a great day.
Toby