Here is why MOSFET drivers are sometimes essential! || MOSFET Driver Part 1 (Driver, Bootstrapping) 

Part 2: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-B7Eqrf2M-Iw.html

If you made a full blown course of how to get started in constructing technology I’d pay for it. I love these videos would love to learn the basics so I could do projects like this.

I am so glad so many people like yourself are out there, getting on youtube, and expanding their futures, while teaching. I'm an old fart, I've been working in this field more than fifty years, but you've taught me more than a thing or two, "surface mount, liquid solder, oven soldering", what's this world coming to? Very nice demonstration, thank you.

Dude you just resumed my B.S. Electrical Engineerging thesis on like 13 minutes. WTF Just awesome.

It bothers me that you always scrub the highlighter until it smears. Sorry, I couldn't hold it back any longer.

What can I say except give him an award.

Another reason to use MOSFET driver: cross-conduction prevention that could prevent your Metal Oxide Silicon Field Effect Transistor into becoming Magically Obliterated, Smoke n' Fire Emitting Transistor in a bridge configuration.

If you had 100 videos about driving MOSFET gates, I would probably binge what all of them today. This is great, thank you.

The slowly blackening tip of the yellow highlighter gives me flashbacks to college.

This is exactly what I was looking for. Really Great scott!!

"The *field* of power electronics" IC what you did there Scott :) Edit: Damn, thread ended. Was hoping we'd see more electronics puns.

Wonderful Video! I didn't know about mosfet drivers before this video but now I know what to do with them, Thanks!

I started viewing your video nearly 4 years ago when I didnt knew anything about electronics and now I know things about electronics still I am enjoying how you explain

I have an exam on mosfets in two days. You have no idea how much this helped me

Genuinely the best explanation of MOSFETs and how to drive them I've ever seen. The only thing missing, which can trip people up, is depletion vs enhancement mode for both P and N channel

You know what, there is something therapeutic and calming about the way you speak. I've been subscribed for years and just had a moment.

I’d love to see you discuss the consequences of using a 3.3v PWM output as provided by an ESP controller. Currently I have some designs where I’m providing a 15vdc gate driver voltage to facilitate good MOSFET switching, but that’s now a second power supply on the pcb (in addition to the 5vdc one to drive the ESP). The MOSFETs are driving 24vdc LEDs.

This is the best video you've made for months! I'm very excited about part 2.

I have no idea what you're talking about, but I do like your videos. Job well done...

13:15 "But, of cousre, you don't know everything yet" It's me, in every aspect of my life. Especially when I think I know what I'm doing.

Very well done videos. You have a natural talent for teaching. You lay out the concepts in a logical way which makes them easy to understand. I have a formal education in electronics, but informal instruction like this through RU-vid is really amazing for the hobbyist without a formal education. You have earned a new subscriber. I've used plenty of MOSFETs in a variety of circuits in the past, but even professionals seldom just know how to do these things from memory. Unless you build the same circuits all the time it is often helpful to study some references before designing anything. I think videos like this are even useful for professional EEs who want to brush up on the concepts before diving into a design. I just bought a broken plasma cutter. It works just like a big off-line SMPS by rectifying the 240 VAC in to 350 VDC, then switching the 350 VDC with a variable current limit and rectifying the resulting AC to develop the 10-60A needed for cutting up to 3/4" (19 mm) steel like the proverbial hot knife through butter. On the switching board are 16 FETs arranged in four groups of four in an H-bridge. I can see two rather large torodial gate drive transformers on the board. I am looking forward to the next video to make sure the technical details of using gate drive transformers are fresh in my mind.

I am blown away of how professional this is...

🎯 Key Takeaways for quick navigation: 00:01 🤖 Introduction to MOSFETs in power electronics: 02:13 💡 Practical example: Switching a high-power LED with a MOSFET: 04:57 🔄 Using an Arduino microcontroller to control a MOSFET: 08:09 🔌 Challenges with low-frequency microcontroller MOSFET driving: 10:01 ⚙️ Introduction to MOSFET drivers and MOSFET driver ICs: 11:49 🔌 Bootstrapping for gate voltage in half-bridge circuits: 13:11 🎓 Conclusion and teaser for Part 2: Made with HARPA AI

I love the detail you provide - I do not understand on the first viewing, but that is the strength of online, view it more than once

This video helped me solve a problem on a product design that came from an outsourced electronics engineer.

Great video. I have been using MOSFET drivers in my designs for quite some time now, without really knowing (or caring, tbh) about their inner working. Thanks to you, I can now make better component selections and designs. :)

Your ability to deMystify some aspects of electronic engineering is of great credit to you, You have helped me so very much as a "Mature" student (I am 62 and still learning.) Many thanks and keep up the good work !!

For some of those applications, you can use a MOSFET driver directly to drive the LED Load. The ones for example in my inverter are rated for 9 Amps and actively drive high and low, which is useful if you want to encode data on a fiber or laser diode.

I never understand your vdos (except a few), but I appreciate your knowledge!! Hats off!!

I couldn't understand half of it ... but got the gist. Can't wait for Part II to hit that Like again!

I wish I could do more of practical, you really set good example with calculation it also helping me with theory and calculation

Great timing on this subject. I was planning to look into the usage of gate drivers tomorrow.

Amazing work GreatScott!, this is yet another example of a series of your invaluable electronics learning resources.

Enjoy the detail you put into your videos...even if I don't always understand what is going on. Thank you!

Wieviel Arbeit in dem Video steckt. Krass. Mega, dass du das machst! Bin von Anfang an dabei ;)

I've built various circuits based on MOSFETs but all the time Optocoupler based circuits works best for me and also would love to share that it's the only cheap, hassle-free and efficient way to drive the MOSFETs 😄

Huge thanks for including your workings in the videos ... so often folk try to cover such topics and just hand-wave the selection of component values. Big takeaway... if in doubt, add more MOSFETs!

I work in a start-up environment where new engineers think I over complicate stuff, without properly looking into specifications. Your video will be useful for me to pass them to get educated

this is very informative Mr. Scott. Really appreciate you taking the time to explain the various pros and cons.

Great breakdown of one of the world's most popular devices and circuitry. This is used in practically every switch mode power supply out there, including laptop power supplies and desktop PC power supplies, just to name a few. Power electronics including switch mode power circuits will become even more popular with electrification of vehicles. Let's all get ready for dangerous high voltage digital circuits! Yes!

Gosh, I've blown up a lot of components learning about FETs. There's a lot to get your head around. It gets even more exciting when you have inductive loads. Gate drivers and bridges definitely are very useful.

Really like your in-depth videos on subjects like this one. Saves me lots of time wondering why the magic smoke escaped from my MOSFETs ;-). Looking forward to part 2!

So glad I came back and watched this again. Was defo worth the 2nd viewing.

THANK YOU!!! I've been wondering this for years but always forgot to look into it!

A short summary at the end of such highly information dense video would be great! Keep up the awesome work!

Genau dieses Video hat uns am Samstag in unserer Miltenbecher-AG gefehlt😅 da wussten wir nicht, wie wir unseren Motor steuern sollen...👌

This thing about driving MOSFETs gave me a lot of headaches to undertand when I was developing my first voltage inverter 1 year ago. I wish I could have watched this video back then, it would be a great help. Anyway, great video as always, even not not being a good english speaker, I learn a lot with your videos, it's also a good way to train my listening.

Happy new years, greatscott. Thanks for bringing us all along! I appreciate you!

i've been always confused with the term bootstrapping, now you explained it clearly with the floating ground. great video as always sir!

Very clear content. Informative for the beginners. Keep going.

Have a wonderfull chrismas and a happy newyear Great Scout🎉

He explain way better then my lecture in school a thousand thumb up for u Scott.

Electroboom is uploading frequently and great Scott too

We found this video so interesting that we decided to feature it in this weeks episode of The Electromaker Show! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ubqw6AZTnV0.html

This video Could have helped me a lot in my university project. I remember i faced issues just because i wasn't using a gate driver. That time electronoobs video on boost convertor helped me to figure out the issue

Thanks so much for your videos. I am a fan. Working my way towards PWM treadmill motor driver and this might help. Waiting for Part 2!

Comme "Gadget Reboot" des vidéos super claires jusqu'au fond du détail 👍

You deliver the right video at right time......

You truly are great Scott, cause this video was great!

Thanks for this video now I gained a lot knowledge from your videos 👍

Please tell me I'm not the only one who lmao at needing the breakout board. "It only comes in smd." 10:20 PogChamp on getting it down to 70 ns.

Such a good explanation with the worked example showing the charge times and average current draw. Correct me if I'm wrong, but my main alarm bells take home from this is that, if using a microcontroller to occasionally switch a mosfet, the resistor on the gate input probably isn't necessary, as the amount of time in a significant over current state is so miniscule, nothing will ever have time to get hot enough to melty melty. However if I'm fast switching a mosfet from microcontroller and the frequency is starting to interfere with the amount of time it takes to actually turn the thing on, I'm essentially spending all of my time *averaging* an over current situation... so in this case I really should be using a resistor (or indeed a dedicated driver).

Great explanation! I knew a bit about MOSFET drivers, but still, I've learned something new from this video :) I'm currently experimenting with gate drive transformers, and I think it is an excellent topic for a video because many people don't know how and why to use them. If there is one thing that would fit here, that is a video about snubber networks :) Thanks for the awesome video and explanation.

great explanation video best I've seen, and you've surveyed all the major issues one is confronted with using MOSFET's

Miller capacitance, the one you are talking at 6:30, is why we can't have nice things in the world. It really makes interesting engineering challenge, and is unavoidable. I once was designing high efficiency inverter, and instead of just using 4 MOSFETs, I ended up with 4 MOSFETS plus extra 48 transistors (FETs and BJTs), plus a 16 channel DSP driving scheme. Crazy, but it worked beautiful. Required a lot of simulations, including parasitics. Using driver ICs is probably better tho, both from complexity perspective, isolation, and performance (ICs can bring loop area smaller, and and reduce inductance). Also 4-pin FETs are getting popular, especially the SiC and GaN ones, where there is a separate source pin, just for driving. The pin has own path to the package for source, so there is no voltage drop when there is current flowing, and it has lower inductance, all helping with turnoff time and voltage clamping.

In your intro, you imply that Vth is enough to fully turn on a MOSFET, which is a misconception that far too many people seem to get. Vth is only enough to barely start conducting, and you need to go a few volts beyond Vth in order to reach the minimum Rdson.

Great walkthrough 👍 Of the adventure of the MOSFET. Thanks for sharing your knowledge 👍🙂

Hey you got Würth as a sponsor, that is a good call from them! I certainly will check their products out!

I'm really looking forward to part two in the serious :)

Wow awesome. So concise and understandable.

dude awesome! also ur handwriting is a gem!

Getting a real Marco Reps vibe here! Great stuff, thank you!!!

Yey! Another great video! Watching from state below yours! (Czech Republic)

why is it that i enjoy the pictures you draw as much as the content?

Very Nice and informative video greatscott! These are an absolute gem for engineering students! And they help tremendously in making projects. Thank you for sharing your knowledge with us!

Now this made me forget all I thought I knew about mosfets

4:40 Thermal runaway is always fun. I remember one time in lab I accidentally hooked up a BJT wrong and it exploded in my face. We were wearing PPE, so my eye was saved, but a large chunk pinged right off my safety glasses. I probably would have been injured if not for the safety glasses. Remember kids wear your PPE :).

Thank you, I was just about to start working on a Tesla coil project and now I know why some designs use mosfet drives and some don’t.

Excellent video and great explanations. Thank you really much for sharing all of these.

The world's best teacher

Absolutely amazing tutorial !

Great Scott is truly Great!

great explanation sir. now i can uderstand mosfet more

Thanks. I now know how to design the circuit.

Great video!! Love the new music. I appreciate the consistency and quality of your videos too. Keep em coming!!!

Very helpful video. I liked it

You are really Great,mr.Scott! thank you for the video.

Love your videos! Thanks for a such a great and well explained video. In 09:39 you showed MOSFET driver circuit that consists of BJTs. It would be awesome to see you building it and also comparing it with custom made MOSFET based driver circuit to compare the difference and analyse all the pros and cons. Just an idea for the next videos.

Very nice , I now understand why I keep blowing up stuff every time I use a MOSFET

Thank you very much for sharing such an interesting subject.

I have seen and love a lot of your videos. Lots of great knowledge and experience. Could you please consider giving an overview before going into the topics and consider spending time on more circuit diagrams. Your examples are great but certainly for me as a newbie, it would help.

what are the odds.. i was just looking up how to control DC motors with a mosfet last night! thanks for the vid !

Did not understand, but was interesting :)

Great video! Recently i was struggling to build my own high power H-bridge for controlling dc motors. I can see that your favourite MOSFET's are easily capable of such application. It would be a nice challenge for you to build such an H bridge and i'm sure there are a lot more makers who would really appreciate your help :D

Bootstrapping with a diode and capacitor is a great hack. Just make sure your duty cycle doesn't stay at 100% long enough to discharge the capacitor to a voltage that will no longer turn on the MOSFET. For some applications (AC to DC inverter, buck converter with undervoltage protection, etc.) this is a perfectly suitable option.

Professor, will this be on the midterm? This triggered my PTSD from college

Great video! I watched it twice.

Great videos as always! Danke für die tolle Videos, ich lerne viel!

Thanks for sharing good electronic knowledge with us.. GreatScott👍👍

It sounds simple "I chose the LM121...". How do you search, compare and choose components without spending an awful lot of time with it?