{319} TL494 PWM IC, Datasheet, Function Explained
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- เผยแพร่เมื่อ 3 ก.พ. 2021
- TL494 PWM IC, Datasheet & Function Explained. it is pulse width modulation controller ic used to drive push-pull, half bridge and buck regulator topologies.
TL494 device incorporates all functions required in construction of a pulse-width modulation (PWM) control circuit on a single chip. TL494 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC), a pulse-steering control flip-flop, a 5 V, 5%-precision regulator, and output-control circuits. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies. output transistors provide either common-emitter or emitter-follower output capability. The TL494 device provides for push-pull or single ended output operation, which can be selected through the output-control function.
TL494 PWM IC Datasheet Function / working principle Explained
tl494 is used in switch mode power supplies / atx power supply / inverter circuit / pulse width modulation motor control circuits / dc to dc converter circuit / pwm module / inverter circuit with feedback / adjustable power supply / class d audio amplifier circuit / half bridge driver / solar inverter circuit /
i explained tl494 deadtime control / frequency calculation / circuit examples / circuit diagram
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Mr Haseeb. This is a wonderful and indepth explaination of the TL494. I am sure that there is no college in the land that could match the information and the delivery you give us in these amazing lectures. Thank you so so much for all the time you spend on these videos. Good health and prosperity to you my dear Sir!!!!!!
best regards
please check video number 449, 450 & 453 for practical application of TL494. another part of this IC is coming soon to program its error amplifiers
Awesome! Thank you so much for this clear explanation.
28:35 current limiting
29:33 master/slave
I have studied in IISc, one of the best colleges in India. I want to assure that there are professors here who only talks about datasheet reading and if someday they open up any datasheet then in a one hour class, they explain so bad and boring you will hate everything . May God bless you❤, you are 100x better than them.
جزاك الله خير اروع واوضح شرح
لله الحمد و الشكر
English version greatly appreciated. Many thanks -excellent content.
best regards and special thanks 💗
Thank you very much, it is a very useful explanation.
Best explanation ever i watched on TL 494 ic . Thanks for sharing
thanks a lot
I believe that you are one of the best u tubers in this field ..
best regards
please check my latest video number 449. that is practical circuit for TL494
Great Video all due to your hardwork!!
Jazaak Allah khair
Teşekkürler efendim. Hayırlı günler dilerim.
Hi excellent video good presentation and comprehensive information thank you
thanks a lot
please accept my best regards for your valuable feedback
Today I am frustrated with a TL494 circuit and I got some ideas to resolve thanks for video, keep going
yes dear. sometimes TL494 makes a big headache, specially in feedback loops and compensation
Mashallaha very nice and useful tutorial. 🌻 🌻 🌻.
Many many thanks
ما شاء الله ♥️ ربنا يزيدك يارب العالمين 🙏 احلى 👍 استمر اخى الغالى
thanks a lot. best regards
Informative and very useful upload. Keep sharing your valuable work brother
Many many thanks dear sister
remember me in your prayers
Another helpful n useful presentation. Big Like 👍
Many many thanks
Very good and interesting lesson
I hope to make a practical video about this ic
I mean with oscilloscope and transistors
Thank you very much
You are welcome
sure i will make a complete tutorial to make a best understandable practical tutorial
Great video , thank you for sharing and have a good day
thanks a lot.
@@HaseebElectronics welcome
Hi friend thanks for another informative video, I just want to know if there are no square waves on pins 8&9 and 10&11, can I assume the ic is faulty? Thanks in advance for your help
Ek aur bahut knowledgeable vdo
Nice upload
Sabhi electronics fields ke logo ko dekhna chahiye
best regards and special thanks dear
Really doing great job
Thanks a lot
Another wonderful sharing my friend, Big thumbs dear.👍🏻 Stay safe Fully watched ✅ Stay in touch!
You are perfect in your work.
thanks a lot. best regards
Great and superb video like always, a great detailed explanation. Keep it up brother...
So nice of you
Very useful information Sir Thanks
So nice of you
Another nice job 👍
Stay blessed
Thanks, you too!
Very informative and interesting, stay safe and blessed
thanks a lot. best regards
Great share
Always beautiful sharing hardworking 👍👍
Jazaaak Allah khair
Thank you sir! 🙌 I know have a MUCH better understanding this IC. Could you do a similar video on an L5991? I'm working a power supply from a PS2. It's really only a training aid for me as a new board is only about $15 US.
Thanks a lot.
great very informative .. keep sharing
thanks a lot. best regards
Helpful video 👍
Thanks a lot. best regards
Wonderful video dear friend!!!
Many thanks
excellent work as usual
thanks a lot. best regards
Awesome upload as always dear brother. Keep sharing
Thanks for the visit
best regards
Hallo, vielen dank für die super erklärung! ein ähnliches ic ist der SG3525......er hat allerdings nur einen fehlerverstärker. viel erfolg und leiben sie gesund!
ja SG-3525 ist das gleiche ic, das von 100Hz bis 400KHz arbeitet,
Dieser TL494 arbeitet jedoch von 1 kHz bis 300 kHz (und seine Schaltfrequenz ist halb so hoch, wenn wir Pin 13 mit VRef verbinden).
Es gibt einen weiteren Unterschied, dass TL494 einen Open-Collector- und Open-Emitter-Ausgang haben
SG-3525 hat jedoch einen Totempfahlausgang
(Es wird mit Google Übersetzer übersetzt, möglicherweise ist es ein Fehler bei der Übersetzung in die deutsche Sprache.)
yes SG-3525 is same ic that works from 100Hz to 400KHz,
but this TL494 works from 1KHz to 300 KHz (and its switching frequency is half when we connect pin 13 to VRef)
there is another difference that TL494 have open collector, open emitter output
but SG-3525 have totem-pole output
(it is translated using google translator, might be sime error in tranlating to German language)
Thank you so much
best regards 💕
Excellent Thanks you sir.
You are most welcome
super Laik 134 bon courage
thanks a lot. best regards
mashallah so beautiful video big like 👏👏👏🌷🌷🌷🌷🌷
excelent analysis thenks
Thanks and welcome
Very great work brother
Thank you so much 😀
Thanks for sharing good knowledge my brother
My pleasure
15lk
Very nice upload
Thank you so much
Thanks for sharing keep on vloging God bless new suporters here
Thanks for coming
best regards
Thanks!
best regards
Welldon great job
thanks a lot. best regards
Walkum aslam mashaAllah excellent work bhai
thanks a lot. best regards dear sister
Good tiching karte hai 👌👍👍👍👌👌👌
thanks a lot
Your information is very comprehensive and complete. Thank you very much for the videos you posted. I had a few questions about how to get in touch with you.
You are welcome!
my gmail id is
ashraf4ta4
whatsapp 00962791161084 (Muhammad Ashraf)
Beautiful video thanks for the sharing you doing great job brother mashallah thanks for the sharing god bless you and take care 🇺🇲🥰👍salam brother
thanks dear sister
always excellent
thanks a lot. best regards
بالتوفيق يارب احلى لايك
عندى جديد ↩
thanks a lot. best regards
Thanks a lot sir plz also make a vidio on 4558 ic
اخي الكريم عندي سؤال لو اردنا ان نصنع سخان مغناطيسي يعني طباخ ليزر باستخدام هاذه القطعة ومسفت ٢٠٠v خمسين امبير هل تعمل على ١٢ v بشكل جيد وشكرا
Am trying to understand the load sensor control is it a load monitor sensor to automatically adjust the duty cycle for load to keep the current output of any power supply is that’s your explanation or not
Suscribed ,amazing channel you have my friend
Thanks and welcome
for 494 practical
please check video series video number 449, 450, 452 & 455 to see the practical work of TL494
Very usefull information
best regards and special thanks
Mashaallah brother, This video helps me so much, thanks for the explaination, But can i ask a question?
How does the the comparator work between 2 input : Error amplifier (1,2 and 15,16) and oscillator? what's the action of the IC to control the duty cycle? how can it drives a driver (ex : TLP250) to increasing or decreasing the duty cycle, so the output of the buck converter maintain a stable set point? I hope you can explain it with the video explaination. Barakallah
What is the range of duty cycle ? Can it change voltage how much ? 230 to 110v ? 300 to 50v ? I bought a grid tie inverter for usa and it came with higher European volrage. All it had to go between usa and European was a jumper and a 10k resistor that wasn't soldered fully to the board. They told me where it was and it works fine now.
Lk 52 👍👍
thanks a lot.
Sir. Is it possible to explain UC3843, especially when used in flyback boost converter. I have difficulty to understand the loop compensation between comp and FB.
Thanks Mrs Haseeb, I want to know, if we can replace tl494 by sg3525.
John from Togo.
جميل جدا 🌹🔔
best regards and special thanks
Thanks for your help. I want to request you how to use dummy load & precautions to use on smps
best regards
i will try to explain it soon
ماشاءاللہ ماشاءاللہ بھائی
❤️❤️❤️❤️
best regards
Good Afternoon My Brother
Salaam bhai saahab
Sir good job, i subscribed since your have higher understandable demostration, but there some begin who follow your video so can you prepare special videos for them please?
welcome and special thanks
yes i try to address the questions of my viewers
Superb 👍
thanks a lot. best regards
English MN zaida samji NAI aa raa par ap ne eis par kob ahaa sa work kia hei MasaAllah
special thanks dear sister
*Nice*
Thanks a lot
I get a real good question can the Ic automatic adjust its duty cycle when load is connected to like say a inverter to keep the ac volt at a stable output can the Ic do that ????
exactly yes. ic must have to adjust duty cycle in 2 conditions
1. if load changes
2. if input voltage change
in both cases, ic will adjust duty cycle to provide regulation
I wish there was an Awsome icon! Thanks.
thanks dear. best regards
Hello can help? , I have IC transceiver PAN2416AV for receiver, have 2 output (1. Input, Input with Pull-up resistor, Push-pull
output, PWM output "for forward") (2.Input, Input with Pull-up resistor, Push-pull
outputoutput, PWM output "for reverse/backward"),
how to connect to ESC with 3 cables S+- ( esc only have 1 signal input, ic receiver have 2 signal output)
In a SMPS the IC number is erased, how to identify it is TL494 or KA7500 or if other 16 pin IC?
I noticed you avoid the feedback voltage I really would like you to explain the feedback voltage and how it work and where the feedback voltage should come from
Hello, dear brother, I have a 12V 30A power supply whose power transistors are 2sc2625. It was broken, and because I couldn't find that model, I used the large package transistor l13009. Currently, the highest output current of the source is 16A. Can I increase the current to 25 amps by manipulating the tl494 pins? I hope you can guide me
sir. how we could do to minimize overshoot, undershoot or ringing problems on tl494 amplifierrs?
Is it possible to make a spwm output with this ci?
Ihave this problme but idont have any lm 358 or any comrator
I grounded pin4 but it's not work
What can i do for this problem
Thanks
Sir excellent information please help me sir can I use to 494 instead of tl594
Nice physics and lectronics
most welcome
Watch for 12 min 🌻🌻🌻
best regards and special thanks
Esselamu alejkum brother. Can you explain how do we calculate feedback compensation loop and what does it mean? Thanks!
sure. it is basically the gain adjustment of feedback error amplifier. so we select a resistor which will suitable to create a relation between the output voltage and switching of the controller
TL494 is a voltage mode control, therfore the open loop gain will observe a -40dB slope which make it difficult to compensate. At least a feedback compensator type 2 or best would be type 3 to keep the loop stable. Great work for tutoring others.
Thank you sir,
I have inverter( 12v dc to 220v ac ) using this ic, but the output hertz reaches 100Hz not 50 hertz but volt output is correct (220v), how can I solve this problem???
Thanks,
please check its RT/CT values. may be these components at pin 5 & 6
and check 5 volt reference at pin number 14. if more than 5v, replace IC.
or calculate and adjust RT & CT values for push pull 50 Hz operation
@@HaseebElectronics
Thanks alot , appreciated your response.
Hi
I will ask differently from this topic
I have a Mega328 lcr-t4 transistor tester and it's defective
measurements of components are always like mosfet
do you have any idea about repair
thank you
this mega328 is digital, so i never tried or used it so far
@@HaseebElectronics 😊
Hello , I'm from SothAmerica , can u make more videos about inverters welder machine? I kind of understand that it is a current mode smps
welcome dear
there is a complete series of inverter welding machine, theory, circuit and practical
check video number 289, 291, 292, 293 299
🎉
oh my! hahahah! the reason why I majored English in college and became an English because of this crazy numbers ahahah!
thanks a lot. best regards
Aslm brother how can I change an smd transistor with bipolar
How can I increase 12 volt 40 amps to 30 volts?
Transistor ki base emitter voltage, base collector voltage, collector emitter voltage kya hoti hai ? Sir please is topic ko detail me batayiye & kisi circuit me lage transistor ki base emitter etc voltages ka kese pata kare k working circuit me wo transistor kis voltage pe kam kar rha hai? Kyi baar kya hota hai k SMD pacakage me equavalent nhi milta to problem hoti hai. Mere paas car ki LCD Display hai usme AB2 transistor laga hai jo k khraab ho gya. AB2 transistor (SOT-89) Pacakage me hai jo k 60V, 2W & 5A ka hai. Ab problem yeh hai k SOT-89 Pacakage me 5A ka transistor nhi mil rha agar koi milta to uski base emitter voltage kam hoti AB2 k compare me. Please is topic pe video bnaye... thanks
Assalamu alaikum, Bhai, ak ic ha jiska number mps2229 , jo 60V250AH E-baike Charger pa dia Huwa ha eski equivalent mil nahira ha, datasheet vi properly nai Mila, ap eski barama TH-cam pa Kuch bataiya to bari meharbani Hoga. Allah Hafaj.
🤝🤝👏👏👏💐👍👍
thanks a lot. best regards
L6599ad ic testing kaisa Kara
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most welcome
how remove protection tl494
Assalam walekum
L6599 ic tasting kaisa kare