When looking at a datasheet, do NOT use the value of Vgs in the section "Absolute Max." This section is for conditions that will damage the MOSFET. More information here: discuss.addohms.com/t/what-does-absolute-max-mean/72

@hairyoldhippy

6 жыл бұрын

Nikša No additional components are required for basic switching. For high speed one would likely need a higher drive current (because of the gate capacitance) than can be provided by a signal generator and physically adjacent rather than at the end of a cable. Just ensure that the generator swing goes close to zero to ensure 'off' and for fullest conduction the drive voltage should approach the maximum allowed on the spec sheet. But do you actually need a BIMOSFET? Plain MOSFETs are much more readily available and cheaper. Old PC motherboards are a good source. If you do need the enhanced high voltage capacity of a BIMOSFET it might not be particularly wise to embark upon such experiments until you have gained more experience because it can be dangerous and expensive. Have fun though. BTW, BIMOSFETs are just IGBTs, the additional name is just marketing. And IGBT is a silly name anyway 'GIT' (gate insulated transistor) would have been far better, that's what we call them in the lab.

@DaniloAlves-vy2od

5 жыл бұрын

Traslate to pt-BR, please..

@brentparrish5453

5 жыл бұрын

AddOhms a

@alejandrajorge2338

5 жыл бұрын

One question, we are working with a 2n7000 n channel transistor and in the drain caracteristics grafic states that the id max its reach at Vgs=10v with 1.5ma aprox. why its this, isnt it supose to be at Vgs=0v idss?

@Paul-gz5dp

5 жыл бұрын

I look at the Vgs and even the Vbe on BJT as what will kill it, and have put an LED on that location between base to emitter or gate to source to prevent the damage, as even a BJT can have too high of a voltage when there is not enough load on the collector when in darlington configuration. Best designs are ones that take into account what might happen to cause failure, then if something unusual happens it does not die on you.

finally... someone explained how to select the mosfet in practice... in university they are all about calculating amplification, working of a mosfet in molecular level, etc. but they won't tell simple things like these, which are super important when using and selecting the transistor in practice. Thank you, sir!

@_valles3438

5 жыл бұрын

I agree, I just knew they were voltage controlled -_- This guy taught me so much in 7 minutes, I really liked the datasheet part (at school they just throw questions and say to use the datasheet, but not explain what to look for or determine if a heat sink would be required)

@philipvernejules9926

4 жыл бұрын

........I remember those type of textbooks.. It's important to have a play with the components to get familiarized. I'm surprised how many people don't know a simple set up with a p and n channel jfet that results in a tunnel diode effect but when I first came across this simple circuit I just had to try it out and it produces excellent sine waves according to my hearing perception.

@slathian1223

3 жыл бұрын

@dylans voice Which is why some companies are moving away from schools. Had an interview taking 3 hours of an online quiz, had questions from basic programming to PCB design. They had open internet and said go for it. We will contact you if you are selected after it was completed. Overall, the best interview I could say that I had, I also believe they had 7-8 other candidates taking the test, we were all spaced like 15 minutes apart to have the 1 on 1 personal questions.

@Trev9

3 жыл бұрын

I failed Electronics as a subject and hated it for its Transfer Functions, but I could build any circuit I chose to. Damn lecturer was as boring as mud

@eddd653

2 жыл бұрын

@dylans voice yup cheaper too 💀

Excellent! Finally someone covered the stuff one actually needs to know for their projects. I'm trying to buy a MOSFET, not design one.

@K1GBD

Жыл бұрын

I'm making t-shirts that say "I'm trying to buy a MOSFET, not design one." That expresses my - an many people's - frustrations perfectly, and why I also very much appreciate this video even 8 years later!

My uncle is an Electrical Engineer. I have asked him many times about mosfets as I have been watching him working on circuits since my childhood. But every time his lectures just flew over my head. Then I searched youtube and got my answer.

When you started talking about mosses I just rolled with it. really shows how easily zoned out I can be :P

this is a great video. really enjoyed how you not only explained the functionality of MOSFETs but how to actually use them in a real-world application. thats something i wasn't taught when i was in school (not sure why though).

@mimiculmore

7 жыл бұрын

Sorry I don't understand?

@Noogleminus

7 жыл бұрын

Audio, power supplies, motor controllers, and really anything that requires significant power. BJT's are generally lower power transistors. MOSFET are used when you need to power something. If you open up a power supply, you may see these guys regulating the output and/or gating the input. Often times, they replace the role of a relay. Relays are great, but they have their short comings when compared to transistors. This an area where MOSFET's shine. An example can be found in Arduinos. These are little micro-controller boards. They have an extremely limited power budget to work with. The Arduino can't even kick out enough power to close a relay. The Arduino has the brains, but not the brawn to make a lot happen. If you wanted to make your Christmas light flash on and off in time with music, you'd have a situation where you'd want relays to close reliably in time. These relays may need to be beefy enough to take several amps of current and require significant power to close. The MOSFET might be your interface between the Arduino and the relay. Another example would be in car audio amplifiers. You might need several amps at 30+v alternating at 30+hz in a sine wave. MOSFETs are used to make this happen. Consequently, they put off significant heat which creates the requirement of the large heat sink chassis. There are countless other reasons to use a MOSFET, but this is already a book.

@starcitizenmodding4436

7 жыл бұрын

School is the slow way to learn :/

@gerardofire69

7 жыл бұрын

youre absolutely right, the truly deal is out there, were's the real troubles are,

@mal35m

6 жыл бұрын

I took eet in college many years ago. This 7.45 minute video is worth 2 hours of class time as far as I am concerned. The classes I took were not bad, it is just that there was an extreme reluctance to get into anything practical.

I have been watching various electronics KZreads for a year or so. Now I understand what a mosfet is used for.

@AddOhms

2 жыл бұрын

But I’m sure you’ve seen how N and P type materials are laid on top of each other, countless times. ;)

@oddjobbob8742

2 жыл бұрын

@@AddOhms hahah yes, like that really explains a lot to me when it comes to knowing what a transistor does in a circuit.

Hi James. This Channel is one of the BEST anyone can find in KZread. I really like your videos. My reasons: 1) Your diction is great, extremely clear, well articulated. 2) You have music ONLY in a few spots, which I consider that is perfect. I hate those tutorials when it’s almost impossible hear what the person is saying. 3) You visual and graphics material are of the super highest quality. 4) Once in a while a joke is perfect, as an “ice breaker”. 5) You have a great respect for your audience. A+++ 👍 I subscribed to your Channel & Turned On the notifications. Congratulations!

Your MOSFET guide/worksheet is great. So are your videos. The guide/worksheet has helped me immensely with an IRF540.

Great Vid with no annoying background music. Subscribed

I love it how you broke down the complex systems into easy to understand simplicity. That, and the random humor helps keep things interesting.

Thx, finally a beginner oriented and well explained tutorial.

Thank you. While I knew the basics in general, your video here showed me what I was getting wrong and what I was getting right. Now that I know how to interpret a datasheet *correctly* and what to look for, I can make better decisions for designs. That's all I am looking for is plain spoken direct explanations.

This is my favorite AddOhms video. The viewer KNOWS they need a MOSFET and you show them how to use the data sheet to select one. The review is a nice touch too.

This is, BY FAR, the most comprehensive and accurate tutorial for MOSFETs on KZread.

@AddOhms

7 жыл бұрын

"Most accurate..." except for the part where I draw a depletion mode symbol while explicitly stating it is an enhancement mode symbol. ;)

Thank you for making this video so much, good sir! I wish that my radio lab instructor could explain all the concepts as clearly as you did in less than 10 minutes. You got a real gift.

My professor talked about this but with you assistance this now makes clear sense. I really do like your approach to teaching this concept. Very easy to understand and the anecdote at the beginning was a good way to diffuse any tension when learning new concepts.

@kabkab8441

6 жыл бұрын

I agree!!! Sometimes I wish there was a pause button to push to slow down professors, or a please make this clear button - no such luck!!

Thank you for making these videos because you don't just throw equations at us but you explain how fets mechanically works and then use the V,R I's in equations but they're within the context of your tutorials.

Hey man, thanks for the videos! They're not only clear, but the production is pretty good. Keep 'em coming, they're much appreciated.

Great Video - after 40 years as an EE I now understand MOSFETs a whole lot better.

Great explanation about heat. Thanks, it is often overlooked because it is confusing, but your explanation was superb. Thanks!

@jimstanley_49

5 жыл бұрын

Just don't forget that the ambient temperature won't always be 25°C. If the installation is some cupboard next to a south-facing window, you can bet that it'll get up to 45 in there and let the smoke out.

Great video, very well produced! :)

I have years watching electronic videos on youtube, and i can tell maybe 5 are the channels that are actually worth to watch, this is one of them..great job mate

I love that you make the connections between the datasheet and the behaviour! So great!

Good video, you have another subscriber. Keep up the good work.

I was so impressed I subscribed before the video ended. Keep up the good work.

@MP-mx9nf

5 жыл бұрын

dito. superb video

@robbiecardew7538

5 жыл бұрын

Same here, I agree.

In just a couple minutes, you have explained clearly the selection and the application of MosFET. Thank you!

Great video! Gets right into practical application to show you how to select the device that will work for your circuit. Love it! Please keep this kind of content up!

I've been trying to increase my limited Electrical knowledge, and your videos are some of the most informative and easily understood. The fact that you back them up with fact/cheat sheets on your website is really a nice touch. Look forward to some more videos from you in the future, they've done me a lot of good. Thanks

Wow, what a fantastic video. Great stuff, very helpful

Just awesome, so short, so compact, and yet "all" you need to know. Thank you very much!

This should be the only video found for the term "mosfet usage". Thank you!

30 seconds in and I've seen an engineer with an efficient hairstyle, information on transistors and MOSFETs and seen an intro.. subbed!

Nice video. Love the 'autorouter' shirt. ^_^

@BillAnt

5 жыл бұрын

At 0:28 The other says "I'll get H2O" too ... the second guy might die, but at least he'll be disinfected by H peroxide. ;)

MOSFETs were a godsend to me when I was transitioning from vacuum tube circuits to solid state. Because they are both voltage driven, it was fairly easy to adapt the designs from one to the other. That gave me some breathing space while I got my head wrapped around current driven BJTs.

@dreece2000

Жыл бұрын

I feel a rudely impulse to ask what you were building

Absolutely wonderful video man. Would love to see this education approach on how to implement high and low side switches using MOSFETS

Great video. You put in lot of effort into doing this and will greatly benefit lot of beginners. Kudos.

Very well done tutorial, I am pleased it was suggested by youtube. subscribed.

I wasted about 1h in googling some informations abour BJTs and/or MOSFETs. And now after more than the half of the time, I got what I need. Thanks man! :-)

Thanks so much for this tutorial. I see it's been here awhile but I plan to start using them so I can scale up my robots. Explaining the datasheet was great info.

When you started explaining about moss i really thought there was a deeper connection between Mosfets and moss and started having all sorts of imagination about how it could be related....

We are waiting for a lesson about IGBT!

I love the way you present, to the point well done. Good sound quality too for us old guys. I took electronics for 3 years but still need a refresher now and then. Thanks.

@AddOhms

6 жыл бұрын

Thanks.

A lot of videos on MOSFETs goes into too much details and ended up confusing. But this is perfect, just enough of what I need to know. Thanks!

Man I love this stuff. I should have become an electrical engineer, I find all this so interesting.

@farawayskies

3 жыл бұрын

What did you do instead?

@gusmotorsports

3 жыл бұрын

Same here , I choose IT instead.

@vor946

3 жыл бұрын

@@gusmotorsports i found the middleground in the domain of embedded design

Brilliant! Very nicely illustrated. By the way, do you perhaps know how to dimension the external gate resistance to a mosfet driver? I'm having a really hard time finding anything about this.

@AddOhms

9 жыл бұрын

Sveinn Grétarsson why are you trying to determine that?

@svennism

9 жыл бұрын

It's fine, I finally found a decent article covering this. The reason is that I am currently working on a hydraulic solenoid valve driver circuit which used a 200V mosfet as a switch, and used a mosfet driver (LM5112MY) as gate driver. The applicaiton note of the driver stated that an external gate resistance should be used, but never mentioned any guidelines as to how it should be determined. It is ofcourse just an RC circuit, of which you determine the resistance to get a predefined time constant. Silly me. :)

I really appreciate the moss joke. I'm interpreting it as a reference to how so many of these videos or articles go straight down into the weeds of stuff you really don't seem to need to know to get started learning how to use these things.

@AddOhms

2 жыл бұрын

Thanks, but you put more thought into it than I did. I just wanted to point out the videos are scripted. People are often ask: "how do I make videos like yours?!" I always say: "start by writing a script."

This was a really good video, even if it's several years old by now. I'm just learning about MOSFETs and I was unsure on how to calculate the heat-dissipation thing, but you made it pretty damn easy and clear. I also quite enjoy your style of presentation here. I suppose I should check out the rest of your videos for more good stuff!

You know you are into electrics when you have a favorite type of transistor.

Great video, subscribed!

@MarkReisch

6 жыл бұрын

same!

@froedlmetallmann4643

6 жыл бұрын

Me too.

@JeremyCook

6 жыл бұрын

Hello.

@ProtoG42

5 жыл бұрын

Hey!

Used a power depletion fet to drain the bank on my CD welder(through power resistors) either when switched off or wanting to weld with a Lower voltage. It was expensive relative to other parts but not having a relay on an otherwise solid state design was oh so satisfying. Nice video only thing I would have added is if you want to high side switch one can avoid a lot of headake using a floating supply on the gate and an opto isolate to signal it. Esp practical for one offs where a few bucks isn't multiplied by hundreds or thousands

Concise, a classic I have to re-watch every so often.

Absolutely professional Video! Thank you!

I still think those depletion mode mosfets each contain a tiny little vacuum tube

Clear has glass description, excellent. Thank you so much.

Fantastic information thank you. I’m finally starting to understand MOSFETs. I will have to watch this a couple more times and I will be subscribing.

I think I found my "KZread channel". Thanks, sir.

Yeah, liked the H2O2 joke! The old ones are always the best ones!

Awesome simple explanation/app note. Quick, fast, cheat-sheet style. love it!

A really cool feature of FETs is that many of the enhancement mode type can be triggered and stay triggered with nothing connected to the gate! That’s also it’s downfall as a FET in an SMPS can stay triggered and pop if a suitable gate resister isn’t used to stabilize off time.

Love the hydrgen peroxide joke in the intro. Here another one: *There are only 10 kinds of people, those that understand binary and those that don't.*

@kingsman428

4 жыл бұрын

Actually, it's 11, those that understand binary, those that don't and those that know tristate

I thought there was a boba and jango FET too

@_valles3438

5 жыл бұрын

YESSSSSSSSSSSSSSSSSSSSSSSS

Thanks alot! English is not my mother tongue, but its much more clearer then in school learned by a teacher :)

Probably one of the best tutorial on MOSFETs on the Internet. Thanks for sharing...

Great video. However, almost nobody talks about the necessity of using a resistor between the gate and the ground to sink the current trapped in the gate and for turning the mosfet off properly in any mosfet video on youtube...

@AddOhms

10 жыл бұрын

Excellent point. It's something I already planned to cover in the future. However, it is exactly why I at at least included in the schematic, to hopefully prompt the question "why is it there?"

@ozasl

9 жыл бұрын

This is not a hidden secret of electronics. However, I have learnt that the hard way after hours of google search and experimenting. And sometimes such small details can be really demotivating for an hobbyist or a beginner... It would be good, if you can cover this in the next mosfet video.

@JeremyCook

6 жыл бұрын

Wow, thanks so much! Was wondering what I was doing wrong. Any idea what type of resistor is needed to ground (I put in a 2k which seemed to work fine). Also, I assume there should also be a small resistor from the positive voltage to the gate as drawn.

Regarding the 2 guys in the bar ordering H2O, the second guy dies because he ordered Hydrogen Peroxide H2O2(too).

@TheProCactus

7 жыл бұрын

I had to read that 3 times to get it. is that bad ?

@AhmedSalam

7 жыл бұрын

kind of!!

@raspbianu7817

6 жыл бұрын

voltixD thanks!!

@nejiniisan1265

6 жыл бұрын

If he didn't, at least he got a nice diarrhea.

@maxxsmaxx1901

6 жыл бұрын

voltixD . Hahahahaha

Thank you sir, I was actually using a mosfet driver from microchip to drive some mosfets then ran across your video about the FQP30N06L being logic level, you just reduced my parts count by 2

Fantastic video- first thing I found which actually helped me to put the MOSFET into practice myself. Thank you so much

0:28 I get it, the second man drank hydrogen peroxide.

dont forget the Boba FETs

amazing video taught me more about this wonderful invention in 6 mins then professors have over the past 4 years...

@hemlet

8 жыл бұрын

i agree

I had no access to videos like these nor invested teachers back when I took electronics in high school. Seeing it taught like this makes me realize how different my education could have been... how different I could have been. There should be a government subsidy to pay KZreadrs for producing educational content that can replace classroom lectures.

Very nice and unusual presentation, clear script too. Liked the joke but I now need to find out what chemical H2O2 is. Your picture of the Enhancement MOSFET @2:17 is blured and looks more like a Depletion mode type. Could cause confusion..... Sub'd...........

@michaelhawthorne8696

8 жыл бұрын

+Michael Hawthorne Aahh the wonders of Google.... H2O2.... Hydrogen Peroxide.

@AddOhms

8 жыл бұрын

+Michael Hawthorne Yeah, I drew it wrong.

@mrinalthakur3459

8 жыл бұрын

H2O2 his hydrogen peroxide the chemical which caused the disaster resulting in the sinking of submarine Kursk

@_cw_

6 жыл бұрын

maybe consider putting a note in the description?

@linmanicebird8670

6 жыл бұрын

I doubt it! Western Media Story. My guess is that those rumors about an accident (collision) between Trident US Navy submarine and Kursk are more true than not. These collisions happen all the time, they are just not reported about. Often in Black Sea. Often between ships, less likely submarines. I am fine with these collisions being kept in semi-secret mode. There is one story for the public, another for inner circle. Sadly, this makes sense as most people are no longer capable of critical thinking. "Democracy is based upon the conviction that there are extraordinary possibilities in ordinary people." - Harry Emerson Fosdick

Moss...I lol'd!

@bati5996

3 жыл бұрын

LOL

@L-udo

2 жыл бұрын

._.

Now THIS is how an instructional video SHOULD be! Awesome work, have subscribed. You taught me more in a couple of minutes than all the so called forum experts and their arguing and sniping at each other! Just THANK YOU!!!

Holy moly, great video my man! Very detailed and I appreciate that you have even more information linked to your own website! You've most definitely earned my subscription! Thank you!

Con mi poco inglés aprendí más con este video que en las clases de mi escuela. You get my like!

@AddOhms

6 жыл бұрын

+Robby De nada

thanks a lot, watched a bunch of videos on this to try find the info i needed, but they missed lots of the key info i was looking for, and yours had it!

I like your teaching style. It's easily understandable with no silliness. Thank you

Great video. Thanks. I learned a lot easily and quickly. Nice set of production values as well.

Nice video. Well thought out. Clear and practical. I like the introduction of the data sheet. Practice hands on learning

Great video! explaining the datasheet helps a lot in my understanding.

Just ran across your channel and I am so glad. Love your training material and presentation. As an instructor, I may a little fussier about videos, yours are great. Never seen whiteboard style like this. I also learned more about what I didn't know about MOSFETs in less than 10 minutes. I am a new subscriber. Keep broadcasting!!

You're a legend and I love everything about you. Keep educating us you awesome person!

Great video, showing the datasheets is awesome as it's the way we would need to look for them too. Great video.

I really enjoy the video and learned a lot in little time. I wish most of the tutorials were like this one. I would say people empowering people !!! THANKS ⭐⭐⭐⭐⭐

Thanks James! Got here from Rossmann Repair Group. Thanks so very much and keep up the fantastic commentary! B'H.

This video is great!! i was searching for something like this to know about mosfets and i really didn´t expect to find such a good video. Greetings from uruguay!!

Thanks for the video. I was very helpful, especially the part on when a heat sink is needed. (That was news to me)

Absolutely excellent! Thank you for making this clear and understandable video 😀

Good job explaining, clear, concise and truly informative. Keep up the good work!

Yoooooo that PDF is Amazing for learning this. Thank you!!!! And a awesome video

@AddOhms

10 ай бұрын

Glad it helped!

Wow, It is an precision introduction of BJT and MOSFET

This video was so helpful ! I was having alot of trouble understanding the MOSFETs

Late to the party, but I really like this presentation. Smooth and professional. Great!

Thank you for the great video. Love the format

Excellent. Succinct and to the point, and gives you a logical approach to choosing a MOSFET that meets your switch application requirements. If only the manufacturers and/or distributors would put a tool on their web pages to help you make a selection using this approach!

Hi James, i am from Brazil and would thank you for this videos, i'm loving your channel.

@evertonbarbosa1059

9 жыл бұрын

Tem que falar que é do Brasil, né? Kkk

@MaXwEllDeN

9 жыл бұрын

Sim, pra que ele saiba que o trabalho dele está sendo curtido pelo resto do mundo.

Awesome T-Shirt!!!! Thanks for the tutorial, it was a nice refresher!

Great video, really love the animations you use and the information is very helpful, thanks. Subscribed. :)