What is a MOSFET? How MOSFETs Work? (MOSFET Tutorial)

Рет қаралды 1,287,852

Күн бұрын

Hi guys! In this video, I will explain the basic structure and working principle of MOSFETs used in switching, boosting or power balancing tasks in DC-DC converter circuits, motor driver circuits and many more power electronics circuits. MOSFETs are the most widely used field-effect transistors that operate with voltage control.
We can examine FETs in two groups as you can see here. We had a lesson in which I explained JFET before. I will explain the MOSFET in this trouble. The abbreviation of MOSFET comes from the initials of the Metal Oxide Semiconductor Field Effect Transistor words.
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#mosfet #transistor

Пікірлер: 398

@hotchihuahua1546 5 ай бұрын

The amount of knowledge we can get from these videos is enormous . I am 72 and still learning things . I may never use this knowledge but for the young people out there this videos can open up job opportunities or prepare you in the field of electronics . Even if you were not good in math !

@machdaddy6451 Жыл бұрын

Better tutorials than what I learned in school.

@eeapplications Жыл бұрын

Thank you so much 🙏🏼

@RaginKavu Жыл бұрын

You forgot about the even less known Boron-Oxide Barium Field Effect Transistor, or BOBaFET. It seems that there is even a whole book about it. Jokes aside, nice video!

@eeapplications Жыл бұрын

Thank you. Unfortunately, I didn't know much about this transistor.

@L3X369 Жыл бұрын

Perfect explanation! And The example Mosfet Driver Circuit at the end of the video, made me understand it's use cases even better. Thank you!

@Jonathantatrotattoos 8 ай бұрын

This is exactly what I needed to know, it really dumbs down the information about the function of a mosfet into digestable and useful information I can actually use thank you!!

@rael5469 Жыл бұрын

I just learned more about MOSFETs in 8 minutes then I did in two YEARS of AA degree classes.

@sanelb1147 8 ай бұрын

So wel explained with the picture of water valve, it makes it so much easier to picture and understand. Hopefully your other teachings are of same quality

@Ethio88503 6 ай бұрын

Thank you God bless you, the more you help to give, the given wisdom you shall receive abundantly !!!

@90FF1 3 ай бұрын

Your explanation got my novice level head aligned on the MOSFET. Thank you.

@thisissoeasy 9 ай бұрын

Brilliant explanation! Thank you very much!

@EgyptFishingVideos Жыл бұрын

Great background on MOSFETs. Thanks!

@eeapplications Жыл бұрын

Thank you so much 🙏🏼

@saidfarid6382 6 ай бұрын

Hello dear professor Your lessons are really interesting and crucial, thank you so much for your help and advice,i do appreciate your job,i wish you peace and happiness under the sky of prosperity,all the best. Take care and have a good time.

@WJV9 Жыл бұрын

Some bipolar transistors can also transmit large currents at high voltages. Note that most inverter motor controllers use IGBT transistors which are a hybrid of MOSFET and BiPolar transistors.

@valuedhumanoid6574 Жыл бұрын

As a guitarist, the MOSFET distortion pedal is a very sought after tone. I have no clue why, but it gives the circuit a very unique flavor of clipping and is very popular in the blues/rock/classic metal genres. That's what brought me here.

@Poparad Жыл бұрын

From what I gather, it's the very fast switching rate that the MOSFET is capable of (which is one reason why it's commonly used in high-voltage power situations). Interesting that it's desirable for distortion since most tubes (12ax7, etc) are the opposite and have very sluggish responses. This is one of the reasons why the famed LM308 Opamp in Rats and Tube Screamers is supposedly so desirable.

@CalebePriester Жыл бұрын

I also started studying stuff like this because I play the guitar and wanted to build my own amps and pedals. I did build a distortion pedal with an LM386 and it sounded great. Sounded like a fuzz pedal. It was great.

@josephraj4800 Жыл бұрын

Good Definitions about MOSFET with Related Animations are Stands Apart , Thank for Sharing and God Bless You Too .

@eeapplications Жыл бұрын

Thank you so much 😊

@hareesh2377 7 ай бұрын

Thanks for the teaching

@user-mr3mf8lo7y Жыл бұрын

Thanks for the video.

@kamranalavi 2 ай бұрын

Very clear explanation i did enjoy it .i understand hiw they work thanks I'm your subscriber now

@shashikantsingh6555 6 ай бұрын

This channel is indeed unique and different than others.. keep it up

@user-nh7ql2ez6v 6 ай бұрын

Thank you I have learned a lot

@reedyd Жыл бұрын

Educational, clear and concise. Thank you. 👍

@reedyd Жыл бұрын

Subscribed!

@eeapplications Жыл бұрын

Thank you so much ☺️🙏

@Creativity_DIY Жыл бұрын

Thank you for explaning about MOSFET 👍🙏🇮🇩

@eeapplications Жыл бұрын

Thank you so much ☺️

@lankavillagehut 8 ай бұрын

Thank you very much ....sir 😊

@Bari_Khan_CEng_CMarEng 7 ай бұрын

Good video, much appreciated

@eeapplications 6 ай бұрын

Thank you so much 😊

@camaroblackmatte 10 ай бұрын

thank you , very usefull !

@FockewulfAz Жыл бұрын

What a good content! Thank you very much!

@eeapplications Жыл бұрын

I'm so glad it was useful. Thank you 🙏

@shivakumarperumal1821 Жыл бұрын

I like your video and the way of coaching easily understandable.. Thanks🙏..

@eeapplications Жыл бұрын

I'm glad you like the videos. Thank you 😊

@alexjenner1108 Жыл бұрын

2:25 the electronic ignition in your car is highly likely to be using a BJT to fire the coil. In the GM HEI module it would be a MJ10012 or similar and would be conducting up to around 6 Amps. Almost every solid state audio amplifier from the 1960s to well into the 1980s was using bipolar transistors. High power mosfets became more popular later on. During the same period, bipolar power transistors were used in almost all mobile two-way radio equipment in the RF power transmitter stages, until power mosfet pricing and performance improved. There are plenty of high current bipolar transistors.

@guilhermeferreirabr Жыл бұрын

Really nice explanation, kept it simple! Continue with the good work 👍

@eeapplications Жыл бұрын

Thank you so much ☺️🙏🏼

@tristanmcnabb2741 Жыл бұрын

Allsome work guys from cruzermans inventions 😁👍🎉🌟

@lsellclumanetsolarenergyll5071 4 ай бұрын

Excellent video, can you do a 2nd video by chance on how to measure a MOSFET to determ if it is BAD or OK ?

@beckma475 Жыл бұрын

Superb, very Helpful for my quick review. Subscribed

@eeapplications Жыл бұрын

Thank you so much ☺️🙏

@DrSanaullahkhan98 7 ай бұрын

Excellent, well explained ,very knowledgeable session, all the best and keep it up..

@eeapplications 7 ай бұрын

Thank you so much ☺️

@ServiceOrchestramegastore Жыл бұрын

Thanks. explained well.

@eeapplications Жыл бұрын

Thank you so much ☺️🙏🏼

@warwar4876 Жыл бұрын

Thanks a lot for your sharing Sir.

@eeapplications Жыл бұрын

Thank you so much ☺️🙏🏼

@edgerrr Жыл бұрын

Don't let the direction of current flow bother you. Think of one direction as electron-flow and the other as hole-flow. Hole-flow is aka conventional-flow and a hole can be thought of as where the electron flowing in the opposite direction used to be.

@nunyabisnass1141 Жыл бұрын

Ive been trying to tell my wife that for years, but she still won't try it.

@arjumandvillagecooking 8 ай бұрын

great video 👍 respect from Gilgit Baltistan❤😊

@eeapplications 8 ай бұрын

Thank you so much ☺️

@leanne5751 5 ай бұрын

Great video, thanks.

@georgemiller6930 Жыл бұрын

I LOVE THIS CHANNEL!! BY ORDER OF ME, GEORGE MILLER, DON'T EVER STOP MAKING VIDEOS 🙂

@eeapplications Жыл бұрын

Thank you so much 😅👍🏻

@FactsBeFacts Жыл бұрын

No-one cares what your name is bro

@El_Chompo Жыл бұрын

Very well done.

@eeapplications Жыл бұрын

Thank you so much ☺️🙏

@mitchelldynamix5405 Жыл бұрын

Great explanation

@eeapplications Жыл бұрын

Thank you so much ☺️

@JeffMccollum-ry8cs Жыл бұрын

Nice Job! Thank you for posting it. This lesson is perfectly thought out and illustrated nicely. The AI voice is fine by me.

@eeapplications Жыл бұрын

Thank you so much ☺️

@notmuch_23 Жыл бұрын

With a logic-level MOSFET, the circuit with the Arduino Uno would be just fine. however, with a power MOSFET (the kind that can control large currents), that would fry the microcontroller with the inrush current (gate forms a capacitor with the junction). In those cases, one needs to use a gate driver, which I think would be a good follow-up video subject. I've used MOSFETs to modify flywheel foam dart and ball blasters, since the motors I used have a 28 A stall current.

@aditputra90 5 ай бұрын

thanks

@Bianchi77 Жыл бұрын

Nice info, thanks :)

@eeapplications Жыл бұрын

Thank you so much ☺️🙏

@mhammedaneb4635 Жыл бұрын

Thank you for this explication

@eeapplications Жыл бұрын

I'm so glad it was useful. Thank you 🙏

@salimsalim9678 Жыл бұрын

best video simple way explain 😉

@eeapplications Жыл бұрын

Thank you so much ☺️

@tmdrake 7 ай бұрын

Good stuff....was better when EE were specialists back then.

@retawyalc153 4 ай бұрын

i like it.

@xtdi2295 Жыл бұрын

Super materiał bracie!

@eeapplications Жыл бұрын

Thank you so much ☺️

@jothisivagurunathan1306 8 ай бұрын

thanks. i liked this video

@eeapplications 7 ай бұрын

Thank you so much ☺️

@thelightings 10 ай бұрын

thank you alot

@augustusmbiti3854 Жыл бұрын

This is we ll explained and understandable

@eeapplications Жыл бұрын

Thank you so much 😊

@bedaiie1622 5 ай бұрын

Hello, what studies are required to master the operation of this electrical board with its components?

@xouenm Жыл бұрын

If there's JFET and MOSFET, what about BOBAFET? Kidding aside, I love your explanation between these two. Thank you.

@rico5870 Жыл бұрын

Nice video!! Subscribed!

@eeapplications Жыл бұрын

Thank you so much ☺️

@conmcgrath7174 Жыл бұрын

I couldn't agree more, simple and practical knowledge. Add another sub for sure. Edit; It's really annoying me that I can't remember the term for power control using this method.....oh, hang on, the lazy little hamster that powers my brain just had a run on the wheel, Pulse Width Modulation, I feel so very much better now! Pax.

@yogaforsuccess Жыл бұрын

Thank you

@satipsrl5207 Жыл бұрын

Using the pot to variable polarize the gate is same to control the speed of your car with a valve from fuel tank to the carb or injection pump .Did you heard pulse with modulation sometimes?

@tunkunrunk Жыл бұрын

afters weeks of searching for a video that easily explains mosfets , I came across your video . Thanks a lot !! but can you make a video about mosfets with more than 3 pins , especially 8 pins mosfets ?

@eeapplications Жыл бұрын

Hi. I am so glad you liked the video ☺️ I will try to do research and make a video.

@jbflores01 Жыл бұрын

excellent tutorials! very informative and easy to follow and understand! thanks!

@eeapplications Жыл бұрын

Thank you very much ☺️🙏

@slartythecyclops4643 5 ай бұрын

Still nfi on my quest 2 build a deathstar, cheers anyhoo :-)

@YouTubedigitalcreator69 Жыл бұрын

What a great technology ❣️❣️❣️❣️ your so smart

@eeapplications Жыл бұрын

Thank you so much.

@oldtimer2192 Жыл бұрын

You’re

@CalebePriester Жыл бұрын

This is fing cool!

@eeapplications Жыл бұрын

😅 Thanks 🙏

@zakariahforbes1559 5 ай бұрын

Wouldn't it be better to have a diode on the output of the uController to prevent reverse current?

@suntexi Жыл бұрын

One thing that was drummed into me, working with them, was how fragile MOSFETs are in relation to high voltage. This why, when handling them, you should wear an earthing strap to short out static which may be many thousands of volts; no power or danger to humans but deadly to these devices and their packaging is conductive carbon foam.

@_specialneeds Жыл бұрын

I have often used the IRFzed44N.

@johnaugsburger6192 Жыл бұрын

Thanks

@8abbas 8 ай бұрын

Nice

@kayodeniyi2862 10 ай бұрын

Thanks.

@DeadBryan 7 ай бұрын

Great mosfet introduction

@eeapplications 7 ай бұрын

Thank you so much ☺️

@user-zo5vq1jm3z 5 ай бұрын

P channel arrow going in n channel arrow going out. Thank you I have learned a lot.

@MonoChorMe 5 ай бұрын

Here's an easy way to memorize: NPN = "Never Points iN" ( ⬅⭕) PNP = "Points iN Proudly" ( ➡⭕)

@skywatchman8326 7 ай бұрын

good books on Electronic circuit design recommendation. Thanks for video.

@sangtaobuzz 2 ай бұрын

Tuyệt quá, bấm đăng ký kênh luôn rồi bạn.

@gpetheri Жыл бұрын

So when you turn on a tap, water flows from the drain to the source of the water?? That's where I switched off....

@prestonbecker8784 Жыл бұрын

In an N-type MOSFET, electrons flow internally from the source to the drain, but conventional current flows opposite, from the drain to the source. So, if we choose to have water flowing in the direction of conventional current (as opposed to having it represent the flow of electrons) then that diagram would be correct, with water flowing from drain to source. It may be confusing, but that is the fault of 1980's electrical engineers, not the channel author.

@ChadDoebelin Жыл бұрын

@@prestonbecker8784 the channel author should have used an Pchannel then, or used a diagram that was different, this is absolutely the choice of the channel author. This choice made it confusing for their viewers. Not the "1980's electrical engineers" you are attempting to misdirect the problem at.

@aries6776 Жыл бұрын

That's because there are two types of MOSFET, a P channel would go like you think from Source to Drain, a N channel (far more common) goes from Drain to Source. I agree not the best analogy.

@myintnaing2470 Жыл бұрын

Sir. Think. for. a. nice. explaination

@eeapplications Жыл бұрын

Thank you so much 😊🙏

@ELECTRICMOTOCROSSMACHINE Жыл бұрын

So good.

@eeapplications Жыл бұрын

Thank you so much 😊🙏

@niwamanyakenneth9225 Жыл бұрын

So good

@eeapplications Жыл бұрын

Thank you so much 🙏🏼

@yaad2226 Жыл бұрын

wow bro u explained it so simple make more video make video on how to use it in circuit

@eeapplications Жыл бұрын

Thank you so much 😊 I try to produce as much content as I can 🤙

@sarowerhossain3033 Жыл бұрын

THANKS

@b43xoit Жыл бұрын

What semiconductors are used for higher-power applications, e. g. electric vehicles and hybrids, locomotives, and DC power transmission between AC grids?

@endurofan9854 Жыл бұрын

now this is an interesting query 😁 hope someone answers

@Alacritous Жыл бұрын

IGBT are used for higher power applications.

@electronic-repairs Жыл бұрын

In the last schematic of the DC MOTOR controller DRIVER module. If driving LEDS the schematic is correct. But if used as a motor controller there should be a Shottkey Diode over the motor to prevent spikes from the coil blowing up mosfet. ??

@peterduxbury927 Жыл бұрын

Yes, I agree that a diode (as substituted for the resistor) would be better at controlling the back-EMF as developed by the Motor - when the Motor is turned-off

@hansrajbissessar9098 Жыл бұрын

Well explained 👏 👌 👍.

@eeapplications Жыл бұрын

Thank you so much ☺️🙏🏼

@muhammadrafiqulislamkhan6994 Жыл бұрын

You are super explainer. I hope you make more videos for us better understand. Thank you.

@eeapplications Жыл бұрын

Thank you very much ☺️ I will always try to make new videos 🙏🏼

@lawrencetate145 Жыл бұрын

I'd like to see a simple bare-bones MOSFET configuration like this for audio. There are 10s of thousands of "audio amplifier" designs, but I'm curious about the absolute minimum to pass an audio signal by MOSFET. If there is already such a video, my apologies for not looking first. :-)

@Hagar76a Жыл бұрын

I'd like to see some vids on reverse polarity and short protection. Also latching.

@snakezdewiggle6084 11 ай бұрын

This is how a MOSFET works, Not how to build a spce craft... Don't just buy the book, read the words... ;)

@jamescole3152 Жыл бұрын

At 6:37 with the PWM you don't show any positive leads to micro controller. I don't know maybe it has a separate power source. You show 2 negative leads going to it.

@waynegarfield6607 5 ай бұрын

It sounds like a mosfet is a like a bypass valve. Access to full power ( source ) but if only a partial speed is wanted it sends the unwanted current to drain thereby bypassing the unwanted voltage / current to a different loop and circulating it not wasting in in heat like a potentiometer.

@RockDog101 Жыл бұрын

I'm not an electrician or an engineer (that will probably become obvious in a moment) but it sounds to me like they got the drain and source mixed up. In the faucet analogy, why wouldn't the pipe leading into the spigot be the source? Is that not where the water flow is coming from?

@laysleal13 Жыл бұрын

You're right, they mixed up

@RobDuarte Жыл бұрын

@@laysleal13 It's not mixed up. This is called "conventional current". See the comment below about Ben Franklin.

@prattacaster Жыл бұрын

People it's not right or wrong, you can connect a p channel MOSFET source to a positive voltage and have the drain on negative, so then which way is current flowing? Well, drain to source right? So without more context to the application you can't say whether it's wrong or right. It's just a rough visual of how the device generally works, don't try to hook your FET up to the water spigot.

@Talltrees1235 11 ай бұрын

You are right about the water tap.

@johnstonewall917 Жыл бұрын

2N3055s have 15A continuous and Vceo of 60 volts. First used well over 50 years ago

@bunkie2100 Жыл бұрын

I was going to mention this. Back when I was building power amplifiers in the late 1970s I had a large range of both NPN and PNP BJT transistors from which to choose with collector current ratings over 15 amps.

@alexjenner1108 Жыл бұрын

@@bunkie2100 I was working on VHF and UHF mobile network transmitters in the 1980s, no mosfets there either.

@mach1553 Жыл бұрын

5:15 "If we talk about this circuit, since there's no damage to the potentiometer, this circuit will work smoothly even if there's no resistor." First the resistor is there to protect the MOSFET - Now it's ok to run w/o it since the potentiometer's still good.🤔

@jakejoyride Жыл бұрын

Yeah it seems teacher had no idea what he is talking about

@IMelkor42 Жыл бұрын

I still don't understand why a resistor needs to be there.

@pauliusstanislovaitis7295 6 ай бұрын

Can you tell me what does that Zener diode mean in the MOSFET symbol? I've seen MOSFET symbols with and without it. Does it represent some side effect of a MOSFET, or do they literally put a Zener diode in a a MOSFET for some purpose?

@Big74Mike2012 6 ай бұрын

I haven't looked it up in a while, so maybe double check my info, but if I'm not mistaken the zener symbol is used to symbolize that this particular MOSFET is "Repetitive Avalanche Rated". The ones you see with just the diode symbol means it's NOT Repetitive Avalanche rated, so avalanches will result in a catastrophic failure, just like a typical diode. That's how it was described to me long ago... hopefully that helps.

@IcRDlayout 4 ай бұрын

@@Big74Mike2012 Sir ,i am stupid ! My q is that the diode = rds?

@IcRDlayout 4 ай бұрын

Zener 🤭

@ahndeux Жыл бұрын

6:00 That circuit would blow the MOSFET easily if it doesn't have protection against back EMF from the motors. Anytime the motor is shut off, the collapse of the magnetic fields generate a current in the reverse direction. Typically, you need to add a diode from drain to source wired in reverse to prevent the the MOSFET from blowing. The only time you don't need it is when the MOSFET has internal protection. Some MOSFET circuits that requires an external PWM signal to switch the MOSFET include optoisolators to prevent damage to the MOSFET. Who knows what type of signal people may use as an input. By putting in optoisolators, you decouple the two circuits and prevent external signals from damaging the FET. Its another layer of protection that is used in robust designs. Its common for MOSFETs to blow if its not designed properly. Its almost job security as soon as I look at some of the schematics.

@eeapplications Жыл бұрын

Thank you for the additional information.

@d614gakadoug9 7 ай бұрын

All power MOSFETs have in inverse diode between drain and source. It is there because of the way FETs are fabricated. In the early days of FETs they were just sort of there. Now they are generally carefully characterized and can be used to advantage. The current in an inductor does not change direction when the field collapses. The polarity of the voltage changes but the direction of current flow stays the same. An inverse diode across the FET doesn't cope with that, however the internal body diode behaves similar to a zener and _may_ be able to handle the current.

@tacka73 Жыл бұрын

Electrons flow from the negative to the positive round a DC circuit

@jamesslick4790 Жыл бұрын

Absolutely true, but to this day, diagrams are STILL made using "conventional flow"🤔. I don't know why this tradition persists. 🤷‍♂️

@Toxxxic_ Жыл бұрын

@@jamesslick4790 too much literture too change so easier and less confusing to keep using conventional

@Dorfapoligetik Жыл бұрын

They don't change it because they will not that to many people think about it. when you think deeper about the true direction of the flow, that will show that everything they teach about electron movement is false and in reality they know nothing about they have only theories! about how electricity works.

@Drozerix Жыл бұрын

@@Toxxxic_ Just have a program change the literature. Going forward it doesn't make sense -- to me -- to keep the traditional concept of current flow when electron flow makes more sense.

@willbohland3698 Жыл бұрын

You can find the whole acronym MOSFET in the mosfet symbol. That's crazy.

@coffeeisgood102 Жыл бұрын

Nice video but I am wondering why you didn’t use a diode to protect the circuit instead of the resistor.

@eeapplications Жыл бұрын

Thank you so much ☺️🙏 Unfortunately, when I was preparing the script of the video, I didn't think of it 😔

@oloruntobaoluwadarewasiu8045 10 ай бұрын

Long life and prosperity

@JoseLopez-xu8ue 8 ай бұрын

Power green wire use poline and pour oil and pound blue silver to light medal that heals near over and wait about three weeks

@12Jerbs Жыл бұрын

As someone with a VERY basic knowledge of electronics, why is the MOSFET needed for the fan circuit? If the POT is used to change the voltage to the fan, won't it change the speed of the fan without the MOSFET anyway?

@audunskilbrei8279 Жыл бұрын

Without the MOSFET all the current would run through the POT which would probably burn it up. At leat that is how I understand it but my knowledge is also pretty basic.

@Alacritous Жыл бұрын

@@audunskilbrei8279 This is true for most higher power circuits. POTs aren't meant to switch much current. The one shown here could probably handle the current for that motor but the purpose was to show the usage as a speed controller input to the MOSFET.