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352 Feedback SMPS Switch Mode Power Supply, Optocoupler u0026 Programmable Voltage Reference

Frames 352 Feedback SMPS Switch Mode Power Supply, Optocoupler u0026 Programmable Voltage Reference

Description 352 Feedback SMPS Switch Mode Power Supply, Optocoupler u0026 Programmable Voltage Reference

Comments 352 Feedback SMPS Switch Mode Power Supply, Optocoupler u0026 Programmable Voltage Reference

Wcs bro thanks for sharing as always 🙏 Comment from : Qalbi Nuura Channel

SA My PS is 12 V 20 A output (S-240W-12) it has no optocoupler and TL431 but driver ic is TL494 and there are couple J13009-2 and triple C1815 instead They the transistors all in good condition but TL494 voltage pins value shows 023 while probes between the legs pin7 (gnd) and pin12 (Vcc) at continuity mode and when 220 applied I hear some noisy voice like parasite at the beginning and at the equipment plug out/turn-off for a while (I think while charging the capacitor and discharging) and low voltage (about 5 volts) at the output Possible to say some about that-Thanks Comment from : Suat Kaleli

Why we use R baise resistor What is its use Comment from : Jitendra Singh

Waalaikum salambrthank you masterbrHealthy always for youbrSalam from NUSANTARA Comment from : SAM ROGER

Very useful video Comment from : aldo tambozzo

How to send you a pic and question sir? Do you have a website? Comment from : David Ujcic

is there written blog for this explanation by you? Comment from : Mousa Alakesh

I liked the fixed option that you showed in the end of the video For a 12V output, what Zener voltage should I use? Thank you very much Comment from : Anderson Lima

Hello Can you explain what the resistor parallel to led is used for? Thank you Comment from : Ministerio Mundial Liberando Naciones

Thank you so much brother Comment from : I-7-7

Sir i repaired a smps it works the output voltage is good but when i put a load on output side amps will be not increasing actual charger ampere is 3A but what i get is 07A only where is the mistakebrPrimary section is complete good Comment from : ADEPU NAVEEN

Fantastic explination Finally very clear about how the feedback loop works Comment from : TYGAMatt

Really informative Comment from : Haseeb Abdul

Türkçe altyazi eklermisiniz Comment from : Lokman Goksal

Sir i have great respect for you because your explanation is different from others by many and you use your full of energy doing so Thanks so much may almighty Allah be with you!!!!! Comment from : abrish 105

Very informative information Thanks Comment from : Muhammad Kamal

Greetings, Mr Haseeb hereby I would like to express my gratitude for your sincere efforts to enhace our knowledge of electronics I watched this video many times and it was incredibly helpful for me Thank you for making these educational videos You teach so nicely Hats off to you Comment from : Mahdi Elikaee

Hi sir, what will happen if voltage at vref increases threshold of 25 voltage Will tl431 conduct or what? Comment from : Little genius play school

Sir what is the resistor value (R1, R2) for 50v Comment from : idushan dilitha

Magnifique ce court! Merci Comment from : iTech Fone

please explain about top 250 12v 210w with universal voltage & transformer details Comment from : RAMASWAMY RANGANATHAN

Al salam alekombrI have sat Power supply without load read correct value but with load voltage drop to zero Comment from : taha nas 1957

I want to clone my ic tms320f2812 into another new one ic pls help me How can i do this??? Using ccsv5 and xds100v2 Comment from : Syed Majidali

Thank you bro It was wonderful teaching I wish all of the best for youi have learn so much about electronic from you Comment from : peyman amiri

You have a wonderful way of explaining and making things that are often quite complicated appear easy to understand Thank you for taking the time to make these videos using your gift for teaching as they are very gratefully received Comment from : Clip7heApex

Thank you very much, is the best content i see !!! 👍 Comment from : TopWater

Teacher thanks , i am going to enter In power electronics And i am likely bigner of age 58 year old i think i have learnt a lot from you Comment from : Rashid Qasmi

Does the opto coupler control the duty cycle of the PWM or only enable/disable the PWM IC Optocouplers are quite non linear devices, i think TIA Comment from : Mumbai Verve

Sir ,why a smps battery charger have no output when it is not connected to a battery Comment from : faiq jan

So clear, many thanks Comment from : Simon Inga

Good thanks Comment from : Tharanga Dayananda

As usual, very elaborate & informative Keep it up Allah bless you Ameen Comment from : Hassan TJ

The inductor current has nowhere to go when the main diode turns off This is nasty Comment from : JOHN

I think you are missing a diode ? Comment from : JOHN

Good experience and expertise explanation, sir I request you to make video on how to use short circuit killer for fault idenfication in smps PCB Comment from : Venugopal Kante

Assalam alekum sir is Mai Amp ko kese control karte Hain please help me sir 12 volt 10 amp ka charger hai SMPS battery jab 135 pe hoti hai tu amp 6 hote Hain lekin jab battery 142 pe hoti hai tu amp 02 pe hoti hai jis ki waja se battery full ki light nahi ati or fan bhee off nahi hota lm358 se LED light or fan control Kya hai pwm ic UC 3843 hai please help me sir battery jab 142 pe ho TU amp 2 Hoon phir battery full ki light bhee on ho gi or Fan bhee off ho ga Comment from : Asif Ahmed

Ty Very well explained Comment from : Mel Plishka

I highly appreciate the you teach haseeb keep it up it helps me a lot in my research about SMPS circuitry more power god bless you Comment from : SAGUITAR CHANNEL

I thank you for this good video You explain very well! Looking forward to your new videos! Comment from : Ник Иванов

brother Haseeb thank you for your tuto i just request you about MPPT solor charger and ups Comment from : Fazlur Rahman

Hi and asalam bro Thank you it is great but i could not understand the direction of current ia it from 12v rial supply through Resistor and opto coupler or from zenor upwards Regards jamal Comment from : jimmy college

Sir also make on PWM ic pin funtion and how much voltage on every pin like feedback pin /RT,CTpin /comp pin/sensing pin / Vi pin /OB pin/IS /pinbrbrAnd whats is deference between THX203H PWM ic and SW2604 explanation both functionpin differences and how i can exchange THX203H ic with others ic Regards Aamir Comment from : Ideal solution

Brilliant sir so so so informative Video Sir Comment from : Ideal solution

Thanks for sharing It is quite clear And sometimes I see there is an RC parallel to the 1 and 3 legs, what is this used for? Comment from : songzheng chen

Best explanationexactly what i was looking 4 Comment from : Mohit Gupta

Hy there I want to design 50v smps and I am confused in feedback circuitbrSo how can I design 50v feedback circuit Plz reply Comment from : Nayan Patel

Hi there, I am repairing PFC power supply Bn44-00636b, 53v stb ok, 12v not presented, supply keep clicking on offalso this reference ic I am getting 2488vI think if I follow your instructions, I need 25v? Comment from : Ajay Kumar Targotra

Superb analysis Comment from : Brij b

Thanks so much for the explanations My question is : how would behave the feedback circuit when the output voltage is higher than 12 volts (réf voltage > 25 volts) Comment from : Rachid AKLI

Best EE channel on SMPS by farbrBTW, I think you meant "role" in the title Comment from : ManualSpellCorrect

I did not understand the function of the R bias resistor?? Comment from : Roland Berendonck

Thanks for detailed informative video Comment from : Sushil Choudhary

As salaamu alaikum Bhai! This is an excellent explanation of the closed loop feedback circuit using the TL431 Keep up the good work Your videos are very educational and informative Comment from : Mohamed Kikia

Thanks, brother well explained Comment from : Nipun Lakshan Daluwatte

good video Comment from : viswanathan c r

good video Comment from : viswanathan c r

good video Comment from : viswanathan c r

Very very thanks sirfrom ur explaination I learn so many think Comment from : Chandan Barik

Haseeb can i ask you a question!brHow to measure output in continuous through ADC of microcontroller and isolated also I think this circuit track only reference output through comparator Please guide me with answer Thanks alot Comment from : Ahmad

Jzak Allah khayr ❤️❤️❤️❤️❤️ so much respect and love from Egypt may allah bless you Comment from : Ahmad

Excellent explaination Thanks Sir Comment from : rajesh nandgave

Hi Sir,Diode RL257 JX damage hone koun si choos Karen,Batayen Comment from : Shailendra Mishra

thank you Comment from : خالد باشميل

Salam alaikum ,i now know clearly how this feedback works,I have bee searching for this explanation for long but I have it now mashallah,I want to know the purpose of R BIAS resistor how it worksome smp design u see a resistor at the cathode of the regulator to the 12v main voltage is it the same as R BIAS resistor or it for a different purposethank Comment from : Alidu Adam

very informative sirkeep on sharing by the way can i replace the opto coupler by a different model sir because the part number is erase Comment from : eegayeyet

👍👍👍 Comment from : Vijayanathan Stephen

I wanna know about this bias resistor Comment from : Emanuel Gonçalves Santos

subbed :] Comment from : wegi

Thanks man! I'm now making money in Electronics Repair because of your tutorials thanks🙏 Comment from : Steve Miller

Nice explanation sir brPls clarify one doubt TNY Switch/PWM switch is the only component failing each time i ON my SMPS Pls tell how can I rectify it Comment from : ᴀʟᴘʜᴀ ᴏᴍᴇɢᴀ

sir, after receive feed back reference voltage from cold side ( secondary) Octo coupler switching ground to pwm controller is it correct? Comment from : Manafsaidu Saidu

thanks haseeb sir for the this informative video Comment from : Manafsaidu Saidu

Sir I wish to thank you for all you do I have watched many of your videos I have learned a lot from you about switching power supplies I never knew your trick of back feeding to test the feedback circuit Very smart cookie you are Thank you for all you have shared with us Comment from : NotReallyME

Good Comment from : I Tec Electronic

Sri 🇱🇰 Comment from : I Tec Electronic

dear sir, now i am working saudi arabia pls help to me found equivalent ic becouse orginal ic i cant found this is orginal ic namber STK 412-030 thanks Comment from : liyanage vasantha Vasantha

Good morning awsome video 😁 be safe big like don full 🙈 see Comment from : CarolineDIY and vlog

Thanks, very clear explanation! Comment from : temyra Verdana

Hi Does the voltage at the reference pin HAVE to be 25V?When the 10k resistor is in place, the voltage would only be 2V, like you saidso not enough? Comment from : DREADNOUGHT

Hello, nice video, how to measure voltage straight out the SMPS transformer ? i set the multimeter to AC but cannot read anything Thanks Comment from : Hicham Tassi

Make video on voltage devider network and pull up push down resistor Comment from : ANKUR CHAKRABORTY

its like a very capable surgeon with scalpel in his hand teaching you anatomy of bodyjazakAllah brother and thumbs down seems from people who's brains are pull down to ground rail 'caz of shot capacitor Comment from : rashid khan

Super sharing 👍 Comment from : Mamta ki Rasoi

Salam M Haseeb, my SMPS transformer is making some switching noise and have only 4v output instead of 12v I did not find any short circuit in the secondary, but found that tl494 is 20Khz and its VCC is only a 10Mf capacitor and has 75V Also when i cut the power, voltage increases to 6V before diying Any idea where to look at ? Thank you and salam aleikum Comment from : Hicham Tassi

بارك الله فيك أخي الكريم حسييب وجعله في ميزان حسناتكم استاذنا المحترم Comment from : Omar Abdelkafy

awesome video 😱😱 Comment from : MSB Badsha

Ma sha allah 🌷🌷brNice sharing 🌷🌷brStay connected🌷brGood luck👌🏻❤🌷🇮🇹 Comment from : Ali baba cooking style

Hello sir, I always like your video Comment from : Atul Nakrani

why use R bias resistor ? Comment from : World on screen [Hitesh prajapati]

Very nice sir Comment from : SUDHEER KUMAR

# 1 teacher 👨‍🏫 brThank you brجازاك الله خيرًا Comment from : Khaled Ibrahim

Wonderful explanation as always,now I want to know what will be the internal resistance of TL431(between pin 3 and 2) when 25 volts applied at pin 1 of TL431?( iewhen it allows 100mA current to flow from pin 3 to pin 2) Comment from : MANHARDAN MAHEDU

Very informative Thank you! Comment from : TheGyimi

Great sharing Comment from : Manila Punjabi Kitchen

اللهم باركbrوفقك الله أخي Comment from : Bricoolino Senyor

السلام عليكم بتوفق دائما 👏👏👍 Comment from : كل ما يهمك سيدتي

yes nice Comment from : Victor Rinz

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