Introduction To MOSFETs For Beginners: IRFZ44N & IRLZ34N
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- Опубліковано 27 чер 2024
- In this video we’ll be covering MOSFETs, which are a class of transistors. We all know the standard bipolar transistors or BJTs, MOSFETs are field effect transistors, a different type. MOSFETs control the electrical current flowing through two of their pins, which is done by applying voltage to its centre pin.
IRFZ44N: amzn.to/32E8DuG
IRLZ34N: amzn.to/3mR49HR
Aluminum Heatsink: amzn.to/32Y4Bgs
Timestamps
0:00 Intro
1:40 What Are MOSFETs?
3:29 Gate Voltage & Drain-Source Resistance
5:25 Types Of MOSFETs
9:52 Capacitance
11:11 Example MOSFETs
15:39 Circuit 1: LED
22:16 Circuit 2: Arduino + Motor
28:51 Up Next
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Hi, I'm Hamed, an Electrical & Electronics Engineering Student in Leeds, UK. At the time of recording this video I am half way through my third and final year at university.
Visit my website at www.hamed.engineer
If you have any questions you can email me at hamed@hamed.engineer or just comment below.
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Hello. I think at 17:10 the explanation for how a potentiometer work is a bit off. The potentiometer has 3 pins vcc gnd and output. The resistance between vcc and gnd should be consistent regardless of the value set on the potentiometer. it can be seen as R1 between vcc and output and R2 between output and gnd. R1+R2 is a constant depending on the potentiometer you use. By setting a potentiometer to 0%, R2 is minimized and R1 resistant is maximized. But R1+R2 will not change so you are not shorting the battery out.
Hey thanks for the comment. I always welcome corrections since I'm a total noob lol I've shorted out a lot of components when using potentiometers but I think you're right on this one, by adjusting the pot I'm only changing the resistance at the gate of the MOSFET. Can you check out my explanation on this video at 10:25 please: ua-cam.com/video/Pp2C2iq_ZZY/v-deo.html I'm pretty sure I got it right there. Ty again
lol o god owch, I read this comment before watching the video so knew it was coming up, but man when it happened I nearly flinched! just to note Hamed, you are not changing the resistance at the gate but the voltage, full range between full and none, guessing you have learned a pile over the last year, however I came here to learn how to use the IRLZ34N and you actually reference the same data sheet I'l looking at - so thanks for that :)
You are so good at explaining things. Love your channel.
Salutations. If you haven’t heard it in a while, This is the most amazing and thorough explanation of EXACTLY what I needed to hear. I have been scouring to learn about this for a passion project for some time… and you nailed it. You were not at all boring. I really enjoyed the tree saving stat in the middle. As soon as you mentioned it, I wanted to know. Then you showed it! As an Autistic Adult with learning differences, I have to be able to read, hear, and see concepts and theories for them to sink in entirely and you executed it flawlessly. I cannot Thank/Praise you enough.
thanks bro its very helpful to understanding mosfet works
Another great video Hamed, I'm getting more from your videos than my course, due to your excellent teaching technnique!
Thanks Lucy, making these really helps me as well. I literally just learn about them and then make a video lol
Great and detailed and well-illustrated explanation. Thanks.
Thanks a lot. You really solved one of issues today. Got a subscriber.
thank you for video
This was a really awesome tutorial. I'm looking at building an h bridge circuit since we don't always have motor driver boards and this was super helpful.
Thanks Paul for the nice comment! Glad I could help
great explanation!!
Thanks Hamed, very useful and helpful as always.
Thanks Nigel, much appreciated!
Can I use two MOSFETs to control the direction of mortor
Really nice video: like+subscription. Thank You! 👍🏻
Hello, At 23:13 you show the oscilloscope of the PWM signal, which is a square wave yet later you describe the switching as voltage ramping up then down. What gives?
In a low frequency switching application where you are either in saturation or off, will the irfz44 replace thr irfz34?
I have IRLZ34N MOSFET, and Im trying to get 6Amps from drain of the mosfet.However max current I was able to get was 3.3Amps . Is this the limit of it ? Cause I know battery draws way more then that.
So would a amp made from 1 irfz46 mosfet be louder then something like 1 2sc5200 bjt?
please can you give details of the writing tablet, pen and software you are using? I'm using a magicbook but am looking for a digital solution.
Sure it's the iPad 2018 with the notability app
I don’t see the data sheet showing 1 2 or 5 volt turn the irfz44n on only 20 volt I am loofor a logic mosfet that can turn with 5 volt I can’t fine any
Search on eBay and Amazon for IRLZ Mosfet
Low and behold. After all that, both of the Mosfets the N and P were shorted out.
🤣 it's so hard to know if the problem is due to a lack of understanding or an issue with the wiring/schematic.
@@HamedAdefuwa Brand new bad mosfets. And it doesn't help when I don't trust what I read . My knowledge comes from what I get on the internet.
Yeah I've heard these MOSFETs are basically fake a lot of the time.
At 6:30 you are saying. No volt to the gate, no conduction in the mosfet. Meaning no current flow from drain to source. The mosfet is off.
Right now I have hooked up a 380 ohm resistor to the source of IRFZ44n and then to an LED with its anode to resistor side and carthod to negative rail..
I can not get a straight answer if this mosfet is depletion or enhancement or both.
The base is not hooked up, meaning 0 volts to the base. The voltage applied is 2.7 Volts. THE MOSFET IS ON. It is conducting current. The opposite of what you are saying. I will make a video.
To turn it off I have to ground the base, that is suppluy negative voltage. in other words hook up the base with a resistor to the negative rail. To the positive rail or leave it unhooked does nothing.
Now when I hook up the led on the drain side. either in series or parallel, the led is ON no matter what I do with gate, leave it open, hook up it to positive or negative rail.
One issue I had was leaving pins floating. Then merely waving my hand over the MOSFET was enough to turn it on. Make sure you use a switch/wires as I think they're very sensitive
@@HamedAdefuwa I know all about that. In fact you can turn an led on just waving your hand or hook it up to some coil of wire and sit the wire on the table and merely hookup the cathod on the led to power negative. Touch one end of the coil the light comes on with certain brilliance, touch the other end of the coil it is a little brighter and so on.
I have made many videos and am making more as I check out every aspect of this.
What I find most.... I don't know what to call it... There are no straight answers anywhere. In fact even the terms are used every which way to sun down.
One can never know if enhancement and depletion refers to different 'types" or two different "modes". Types and modes are two totally different terms. To exchange them is apalling to say the least.
One site describes irfz44n as having different behavior depeding on which mode it is operating. You see? In other words one single mosfet having different modes. While at the time it describes mosfets as being tow different types and the vast majority of them are enhancement type and it is rare to find depletion type.
The same goes readig wikipedia. except wikipedia is even more confused. Just google it and see what I mean.
The behavior of irfz44n is way confusing to say the least. LED behaves differently on the drain side than on the source side. On the drain side in series with a 380 ohm resister it does not turn odd regardless what I do with the base.
On the source side the led comes on with or without that resistor and the only effect the base has on it is when I ground ot and turns off.
It also responds to the hall sensor off and on. The drain although draws voltage from the hall output, it has no effect on the LED, it simply stays on.
I have a dozen of these mosfets brand new.
I myself instead of describing what is going on or what to call anything. I just do it and say look what it does. I just play every version and let whoever watch it sort it out for themselves.
Most and I mean almost all. Just show one thing only. or talk theoratically. So one never knows just what is up.
Hall sensor is not how it is described at all. Not when you look really close.
They describe it and showing current flowing and then show the magnet creating voltage across.
in reality, you supply coltage to two power pins and measure the voltage. You can not check voltage on a wire with current flowing through it.
Then the output has little voltage good for nothing and is measured without no magnet passing by it.
The magnet turns the out put to ground negative level. so much for the effect of magnet. So with A3144 the magnet removes the so called ouput. And it is the popular one. You can find if you look hard for the kind that does what it supposed to do. It is expensive aside from it being rare.