Measuring a MOSFET’s Miller Plateau - Workbench Wednesdays
Вставка
- Опубліковано 7 лип 2020
- Turning on a MOSFET takes more than knowing the threshold voltage. A special event occurs when a FET turns-on, which is called the Miller Plateau. The gate voltage sticks to the threshold voltage while the drain opens up. In this video, James shows how to measure the Miller Capacitance, using an oscilloscope and custom MOSFET test board: bit.ly/3iEMH5v
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: bit.ly/2MFMG0v
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: bit.ly/2KLz0TS
Roadtest and Reviews: bit.ly/2KH4fj3
Project14: bit.ly/2wPnajx - Наука та технологія
I watched several videos about Miller capacitance, but I've enjoyed this one the most
A good explanation. Something for me to consider (better) than I have in the past. Thanks.
I'm using MOSFETs in a new design for the first time ever, so this was useful! Gonna be measuring some switching voltages tomorrow 🥰
A unique video that experimentally explains what you only see in diagrams. Thank you for this excellent channel.
Very nicely explained!! Really understood the Miller plateau well!! Thanks a lot!
This is a good course. Thanks!
Is there a follow to this? As a brief demo of the Miller plateau, it's okay, but what most folks really want to see are some concrete examples. It's reasonable to skip the "bunch of maths", but then why not simply connect a multi-turn pot of about 250Ω as a gate resistor and show how you would optimise the switching for a given mosfet and load? You could easily use the Arduino to switch the mosfet faster and faster in order to see how it heats up and demonstrate the upper limit of the gate drive resistor.
Great video
Good video for basic understanding of MOSFETs.. good video.
Thanks! 👍
Thank you very much sir, it couldn't be clearer.
Interesting to see slowly turning it on versus slamming it on, both with probing the curcuit and radiated energy. Would have really liked to see the results with different resistor values. That active probe most certainly would give infinitely more accurate results compared to everyday 1/10x probes, which would be even more beneficial to see. Does rise and fall times listed in the datasheet coorelate completely with the input and output capacitance? What other things would you consider for rise and fall times to optimize switching speed? Look forward to a follow up video on this subject
Thank you for the comments. I provided a response here: www.element14.com/community/docs/DOC-95249/l/workbench-wednesday-25-measuring-a-mosfet-s-miller-plateau#comment-268120
It kind of failed to actually explain what happens but hey, so long as the giant power pro box is in shot that's that matters to the producers.
Yeah, he barely mentions "miller capacitor" and that's it.
What's the make/model of the hall effect current probe? Thanks.
R&S RT-ZC15B. It is a re-badged Hioki with custom interface for R&S scopes. It is the same probe that all teir 1 scope manufacturers use/sell.
Hi, I need help, this is a digital temperature sensor on the pellet burner electronics. Everything works well but I need a little diversion on electronics. The thing is that at some point I need to tell the electronics that some temperature has been reached and if creativity has not been reached. How to influence that temperature via a sensor. There are three wires on the sensor: green, brown and white. Green is electronically connected under one connector and brown and white are connected together under the other connector. So, three wires, two connectors. Thanks.
and how does that remotely relate to the topic? go find a forum.
Hello brother Ilike your video thank you very much
Noice
Is there no better way to explain how mosfet works ? this is fast and complicated.
maybe this is not a explanation of how mosfets works...
no first ?, ok I'll "transmit" it