This IC is Multifunctional - TL431 Circuits
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- Опубликовано: 31 май 2024
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🔥The TL431 can be used for so many applications. Here are a few examples of circuits you could make with this IC. Constant or variable voltage, current limiter, undervoltage or overvoltage protection, battery charger or delay timer. See all the links below.
🔀LINKS
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Constant Voltage Circuit: electronoobs.com/eng_circuito...
Current Limiter Circuit: electronoobs.com/eng_circuito...
Undervoltage Protection Circuit: electronoobs.com/eng_circuito...
Delay Timer Circuit: electronoobs.com/eng_circuito...
Battery Charger Video: • Homemade BMS - Balance...
Occupy Mars T-Shirt: teespring.com/es/occupy-mars-...
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00:00 Intro
01:47 The Zener Diode
02:30 The TL431
04:03 Any Voltage Output
05:10 Variable Voltage output
06:11 Constant Current Limiter
08:46 Undervoltage Protection
10:22 Delay Timer Circuit
12:11 Thank You
Like share and subscribe to motivate me. Thank you
#TL431
#electronics
#components 
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this channel deserves more attention.. nice topic
Thank you and let's hope more people will engage with this kind of content :)
Ditto that. I'd never heard of the the TL431 and now I'm adding it to my current project as a (no pun intended) high-accuracy constant current source (sorry *sink*, even). Fantastic!
I totally agree,
A lot can be learned in this channel
This is the first video I have seen from this channel. I am absolutely going to be using the power cutout circuit for my battery backup that I am installing in my car for my cameras.
This channel deserves a lot of attention.
I like your bench. Makes for a nice background when you're explaining things. Great video and packed with so much educational content. I always enjoy watching videos on basic components even if I don't have a project to use them.
9:30 didn't analyze it yet, but that circuit doesn't appear to implement any hysteresis. As you approach the cutoff voltage slowly (like with a discharging battery) the MOSFET gate source voltage will drop linearly and your MOSFET will enter a region where itends up biased in a linear region. It might also start oscillating with the ESR of the battery and load current draw and stuff. For UVP, you need to add some hysteresis or positive feedback so that it cuts power off decisively, and only cut power on again once supply voltage goes above some slightly higher voltage threshold. (for the record, this can also oscillate as a relaxation oscillator as the voltage on a battery could rise up with no load)
It relies on the very sharp transition of the TL431 from on to off as the voltage applied to its Ref pin passes below its internal reference, as it is effectively an amplifier with a large open-loop gain. Nevertheless, I would share your concern about the possibility of oscillations given the stray capacitances inherent in this sort of design. Adding a resistor of about 27K from the drain of the MOSFET to the Ref pin of the TL431 would add about 100mV of hysteresis, but of course could still provoke oscillations if too much capacitance were present at the Ref pin.
@@RexxSchneider I would fully agree!
@electronoobs, you must pls reply with scientific data
@electronoobs, you must pls reply with scientific data
I tried to put it together for a project, and it didn’t work at all. 😢
This channel deserves a lot of attention. Simple and direct, he explained much more than several Electronics classes. ❤❤❤❤ Thanks ! ❤❤❤❤
( From Brasil ! 🇧🇷🌻🇧🇷🌻)
You are always the best at explaining things to the depth, i really appreciate your videos and recommend it not only for enthusiasts like me but for all age groups to learn something more, b'caus science and electronics has no limit.
Thank you so much, @ELECTRONOOBS. Your explanations are so clear, concise, and useful!
Thanks for the suggestions to make the TL431 accommodate its usefulness in such a variety of applications. Reminds me of how much I liked the IC555's usefulness. Very well done video presentation. 👍
Thank you for this wonderful video! I enjoy learning something new from your videos every time I watch!
Nice TL431 circuit compilation. 👍
Of course not all designs was mentioned - I know few others, but I never thought about using TL431 as delay timer - that makes sense. 😉
I think I tried making an under- voltage protection circuit with this a while ago. I couldn't get it working right, now I might try again, thanks!
This is great. I have a bag of them here since years but never thought about how to use them.
This week I made a 4 cell battery balance shunt. It turned out to be virtually identical to the circuit you presented. Good to know my brain is still functioning since I designed my circuit based on the datasheet.
Incidentally, my battery is 2 modules from a Nissan LEAF running into a 1kW inverter, as a backup in case of power failure. The battery is maintained by a 5 Watt solar panel sitting in the window and only supplies 300mA at best. Incase of actually being used and needing to be recharged I'll use a bench power supply when the power is back on.
Brackets can be helpful. eg Ik = (12v-2.5v)/330 also at 9:17 Vcut is the battery voltage so voltage divider step Vr2 = Vref = Vcut(R2/(R2 + R1)) rearange for Vcut including brackets
Vcut = Vref (R1/R2 + 1).That might be easier to follow for some people. Plus R3 in undervoltage circuit was not explained. Also it would be better to include feedback for hysteresis. But great video.
Crystal clear explanation. Awesome video. Thank you very much for your hard work putting this together.
Such a nice tutorial, we need such excellent and dedicated teacher for next level learning!
Actually, I've never heard of the TL431! I've used all kinds of Zener diodes over the years and didn't know about this IC. Thank you.
THANK YOU
12 minutes well spent 😇
One of the best electronics teacher ever
Another great video Andrei. You're right...that is a very useful circuit. Thank you for sharing it with us.
The time delay circuit can be further improved to actually continue switching states, in other words a TL431 can actually be an oscillator, a peak detect or rc timing circuit can be connected the output where the LED is connected which turns on transistor (preferably a fet) that will actually be able to essentially replace the switch, for instant reset no rc or peak detector is used. For a time delay between the time the output goes high can be achieved by using an rc comparable (possibly another TL431 which will actually make it stay on for a predetermined time and stay off for a predetermined time, potentiometers can be used in both places to change both of those timing intervals independently!
I found out about these by looking up some stuff I found in an old dvd player on guitar forums, I found a few threads where people were suggesting basically using it in place of a transitor, but what I think is more interesting is its variable diode ability. Since diodes clip signals at different voltages you probably could control how much it clips with a potentiometer, or put a regular diode one way and one of these the other way and control the symmetry of clipping with a pot. Nuts
what a co-incident! Greatscott also made a video on the same IC this week
Thank you, that's an informative video, and now I kinda want to go get some of those for my projects 👍
You can also use two of them on a high current shunt for a current relay and detect only a couple of mv before it switches a relay. One provides a 2.5V reference at one end of the shunt. The other end of shunt looks for that 2.5V + shunt voltage. Only a few parts and accurate. 431's are great small relay drivers.
As always, very interesting content! Muy bueno, gracias por los videos tan interesantes!
Merci pour cette belle explication très détaillée et utile
Beautiful presentation my man
I did learn something new. Thank you. 😀
Hii
Electronoobs is my best electronics teacher, I am your best supporter and also a student, it was such a great content of constant current and more i learned in this video
Really thanks to you🙏😅🙂
Wow you are my best always🤤
Perfect that's all I need...... Good job bro...
I loved your digital voltmeter.
This is most underrated chanel in youtube
Thanks a lot four your great video .It's really educational .
Excellent. Very informative.
I like this video ..it's very important for my project
I remember a TL431 contest a very long time ago, the winning project was an audio amplifier for a crystal radio.
I suppose with enough of them, you could build a computer.
Simple explanation and graphics.
Excellent sir, I have subscribed to your wonderful channel.
I love it good
Keep uploading videos like this
Excellent presentation! Thanks
finally, there is someone explain me how this component works
“Hello friend, welcome back “ :)
Please can you create a video tutorial on how to design a circuit in EasyEda or eggle, because there so many things I don’t understand I end up using veroboards.
A good example circuit will be a high frequency inverter (oscillator part and power part, ) from drawing to converting into pcb.
That way, many we’ll manage to order those pcb using your links as a way to support the channel too.
Greetings from Tanzania 🇹🇿
Very informative video! Thanks!
Cool..Love The Litte Paper Diagrams...
Amazing video! Thanks!
Wow.. finally i able to know.. pls make understand of other ic like TL431
Love this channel a lot....
Very educative demo.
Perfect explanation thank you. Can you please make a video on using the TL431 as a cutoff device for battery protection. There are some videos but they do not work exactly as mentioned.
👍🏼 Bro u ar more than a teacher....
You say zener, I devote my full attention. One of my favorite components.
Ever use a LED as a zener? This is a handy way to get an offset voltage and an indicator at the same time.
@@opera5714 honestly that never occurred to me. That is very clever and something I'm going to remember whenever I see an led now haha
Electronoobs , siempre salvandome el pellejo
Good information
TL431
Thanks
Good video bro I am from Kerala India 🙏❤️👍
Great explanation
You could add hysteresis to the voltage protection circuit. I needed one a few months ago and it was hard to get.
Could you use 2 delay timers of this type to generate a square wave? Or just an on-off that's repeating?
Nice topic, respect from indonesia
love your videos. thanks
Cool little IC ..
Thank you for your good job done. Please how can i use the TL431 to bring down any voltage from 35 or 40 volts to 4.5 or 10 volts with variable resistor ????
great production quality. Keep it up. But, please, start adding nodes to the schematics printouts.
Great explanation thank you
This one is awesome👍👍😊
The TL431 is commonly used on the secondary of switch-mode power supplies to tell the primary current to turn off when the output voltage is too high, and vice versa.
great video, too much useful info here, but better splitted on 5 or more parts . Thanks excelent premium job !! ⭐⭐⭐⭐⭐
Very good👍
The FET would need pulsed signal to gate - class D amp.
I have first seen tl431 in 12v adapter as part of feedback circuit. Then i started notice it in almost all smps feedback circuits.
I have a function on an esp32 that's actuated by connecting a pin to ground. I'm doing this with a button right now. How can we replace the button with the 3.3V ouput of a voice recog module?
You and Great Scott coincided on this topic.
I’ve seen GreatScott!!’s video about this, next recommendation was this. Interesting.
Thanks. Good work.
Very nice video, thank you :)
Thank you sir. very useful
Thank you so much master.My question is how can i modify an existing power supply of 40Volts down to 2.5 or 5Volts ?????
The best in internet🌹
elegant precision delay circuit !//
Excellent job.man
Great video. Thanks
What is the advantage of using this over a LM317 variable IC VR that can handle 1.5 amps to the load?
amazing, thank you
بسیار خوب و اموزنده
Great video bro .
quite informative !
Helpful information
thanks. good information
Omg I need to brush up on components Neva knew That existed I need some lol
I will try them all :)
Dear Master, thank you for your good work. Please can this be used to modify a circuit of 5 to 10 Amp power supply ??? if then how?????
Do you know a 40 V (bike battery) voltage method at 4.5 V (phone battery) at a stream of 1.5 A ?
Nice topic bro... 😮
good stuff 👍🏽
Thanks a lot.!!
I wonder if you can also use it for following-
-having a capacitor bank charge up from solar and trigger a circuit when it reaches a certain voltage, like solar toy. ( I imagine using a transistor and an SRC)
-"reverse delay", like for electro-optic gun sight...vibration sensor senses user moving the gun, turns the sights on for a short time. (by altering the delay circuit)
@Hrishikesh Malviy lol. I'm home schooled
@Hrishikesh Malviy nope. PDFs and physical books (sometimes even pirated :p)
May I ask, what is the advantage of this IC over an LM317?
GreatScott! likes this video. :D
Thanks
Awesome 🙏
Sick chip