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

[@QalbiNuuraChannel]

Wcs bro thanks for sharing as always 🙏

[@notreallyme7465]

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.

[@HaseebElectronics]

You are most welcome please accept my best regards for your valuable words for my efforts

[@NitishKumar-mt6tf]

u are very clarifying every point nice to understant everything, thanku for this video

[@stevemiller5214]

Thanks man! I'm now making money in Electronics Repair because of your tutorials thanks🙏

[@Clip7heApex]

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.

[@HaseebElectronics]

You're very welcome!

[@TYGAMatt]

Fantastic explination. Finally very clear about how the feedback loop works

[@abrish1053]

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!!!!!

[@alibabacookingstyle495]

Ma sha allah 🌷🌷 Nice sharing 🌷🌷 Stay connected🌷 Good luck👌🏻❤🌷🇮🇹

[@Ahmad-gn1pd]

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

[@HaseebElectronics]

you are welcome dear brother

[@Ahmad-gn1pd]

@@HaseebElectronics 🙏🏼🙏🏼

[@jefftoll604]

Thankyou for that excellent explanation of the TL431 and optocoupler combination.

[@kaupstudio-supportid5956]

MASHA ALLAH beautiful sharing, very technical and informative vlog, a big thumbs up from my side, Imran from KAUP STUDIO

[@HaseebElectronics]

Thank you so much

[@MrJamez32]

Thank you very much for taking the time to make these videos, i have learned so much from you .

[@HaseebElectronics]

You are very welcome

[@peymanamiri7560]

Thank you bro. It was wonderful teaching. I wish all of the best for you.i have learn so much about electronic from you.

[@HaseebElectronics]

You are most welcome

[@LimVuthyVlog]

Hello my friend ..! 🙏Very nice .. Thank you for sharing ..! like ❤️❤️👍❤️💓🥰

[@megomiftah]

U are the great knowledgeable teacher rare to meet, thanks alot

[@khaledibrahim8609]

# 1 teacher 👨‍🏫 Thank you جازاك الله خيرًا

[@HaseebElectronics]

thanks a lot. stay blessed

[@rashidkhan-pd8cf]

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

[@HaseebElectronics]

wow. i am thankful for your valuable words. please accept my best regards

[@MamtakiRasoi]

Super sharing 👍

[@Elikaee]

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

[@samalamad774]

You have explained this better than anywhere else online. Subscribed. Just a side note: at 7:24 I believe it is best to connect the RLED to the stable post filtered Vout rather than pre filter. This will aid the stability of the LED voltage and gain the benefit of filtering. Great video.

[@CahitUlaş-y8h]

Vermiş olduğunuz bilgilerden dolayı teşekkür ederim. ALLAH razı olsun.

[@carolinediyandvlog]

Good morning awsome video 😁 be safe big like don full 🙈 see

[@atulnakrani8502]

Hello sir, I always like your video.

[@HaseebElectronics]

Many many thanks

[@rashidqasmi8173]

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

[@HaseebElectronics]

Best regards dera sir It is my pleasure that my efforts are useful Please accept my best regards

[@Flyonwaterslow]

Thank you very much, is the best content i see !!! 👍

[@HaseebElectronics]

best regards

[@adityamv4631]

Excellent explanation

[@mohamedantri9433]

بارك الله فيك أخي الكريم حسييب وجعله في ميزان حسناتكم استاذنا المحترم.

[@HaseebElectronics]

السلام عليكم و رحمة الله و بركاته شكرا جزيلا كل عام و انتم بخير ان شاءالله

[@Black_Cat-Sa]

You really a good teacher 👏

[@HaseebElectronics]

thanks a lot

[@ARA-HOUSE]

Lk 9 wonderful upload dear brother ❤

[@ahmedmadkour]

Hi beautiful brother 😍 give you super 👍 good luck

[@HaseebElectronics]

Thank you so much 😀

[@owenpalma2982]

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..

[@HaseebElectronics]

best regards and special thanks for your valuable comment

[@user-pq5tz5pn4g]

السلام عليكم بتوفق دائما 👏👏👍

[@HaseebElectronics]

thanks a lot. stay blessed

[@mehranmohamad6924]

actually nice .thank you. تبارک الله🙏🙏🙏🙏

[@HaseebElectronics]

thanks a lot

[@ShinchanShinchan-t6x]

Thanks sir 🙏 sab samagh main agya

[@ritinarrokomari]

I liked the video very much

[@HaseebElectronics]

thanks a lot. best regards

[@muhammadkamal745]

Very informative information. Thanks

[@HaseebElectronics]

it is my pleasure

[@wesameed824]

Very clear explanation Thanx

[@HaseebElectronics]

best regards

[@idealsolution4468]

Brilliant sir so so so informative Video Sir

[@HaseebElectronics]

Many many thanks

[@qaiserqureshi100]

Masha Allah Ashraf bhai. God bless

[@HaseebElectronics]

Jazaak Allah khair Qaisar Bhai

[@haseebabdul7157]

Really informative

[@HaseebElectronics]

thanks a lot dear

[@SAMROGER-jp5np]

Waalaikum salam..... thank you master...... Healthy always for you.. Salam from NUSANTARA

[@mmohamedfaisal4230]

ماشاء الله congratulations ❤❤

[@vijayakumarkumar9190]

Very good and useful information sir thanks

[@HaseebElectronics]

best regards

[@BajisKitchen]

Mashallah beautiful explanation as always thanks for sharing 👍

[@HaseebElectronics]

thanks a lot. stay blessed

[@الفردوس-ن6غ]

Maasha’allaah very useful please don’t forget to share and stay connected shukran

[@HaseebElectronics]

Thanks and sure

[@kanchankondhare]

🙏💓🌾pranam sirji very nice valuable lesson teach sirji 🌾💓🙏

[@HaseebElectronics]

Thanks and welcome

[@desisimplevlogs1]

Masha Allah nice sharing hey brother

[@HaseebElectronics]

Thanks and welcome

[@hassantj5775]

As usual, very elaborate & informative. Keep it up. Allah bless you. Ameen

[@HaseebElectronics]

best regards and special thanks

[@msbbadsha1456]

awesome video 😱😱

[@HaseebElectronics]

Best regards

[@BomJimmy]

Superb analysis

[@HaseebElectronics]

best regards and special thanks

[@sushilchoudhary5749]

Thanks for detailed informative video

[@HaseebElectronics]

best regards and special thanks

[@sagartrueshayar2517]

w salam bhai very useful video

[@kuchpanktiyajindagiki]

Thanks for sharing such informative upload

[@HaseebElectronics]

thanks a lot. best regards

[@chandanbarik8782]

Very very thanks sir.....from ur explaination I learn so many think

[@HaseebElectronics]

So nice of you

[@ARA-HOUSE]

Wonderfull LUX Layer ad 😊👍👍👍

[@FancyBangles]

ماشاءاللہ ماشاءاللہ بھائی ❤️❤️❤️

[@HaseebElectronics]

best regards bhai

[@meandbabajan76]

Good work

[@HaseebElectronics]

thanks a lot.

[@rajugoud1563]

Super sir your smps god.

[@HaseebElectronics]

best regards and special thanks

[@BricoolinoSenyor]

اللهم بارك وفقك الله أخي

[@HaseebElectronics]

best regards

[@FoodFunAndEnt]

Very informative video

[@HaseebElectronics]

thanks a lot. stay blessed

[@manafsaidusaidu9950]

thanks haseeb sir for the this informative video..

[@HaseebElectronics]

best regards

[@mohamedkikia7338]

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.

[@HaseebElectronics]

It's my pleasure please accept my best regards and special thanks

[@НикИванов-ф2к]

I thank you for this good video. You explain very well! Looking forward to your new videos!

[@HaseebElectronics]

You're very welcome!

[@LousyPainter]

You're the best Thanks!

[@HaseebElectronics]

best regards and special thanks

[@DIYwithBatteries]

I like your brief explanation Sir (even better than other countries) as always :D

[@HaseebElectronics]

thanks a lot. stay blessed

[@sudheerkumar5966]

Very nice sir

[@HaseebElectronics]

best regards

[@MohitGupta-qm6ff]

Best explanation..exactly what i was looking 4

[@HaseebElectronics]

it is my pleasure

[@manilapunjabikitchen8154]

Great sharing

[@HaseebElectronics]

Thank you so much 🙂

[@rajeshnandgave3105]

Excellent explaination Thanks Sir

[@TheGyimi]

Very informative. Thank you!

[@HaseebElectronics]

best regards

[@venugopalkante4111]

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

[@itechfone135]

Magnifique ce court! Merci

[@vuthycooking2]

Hello, hello friend, I am a new friend, thank you for sharing a good video, I like our friend, we are always good friends, I wish you good health🙏💓👋🤝🤝💓💓🙏👍

[@manualspellcorrect9073]

Best EE channel on SMPS by far. BTW, I think you meant "role" in the title.

[@HaseebElectronics]

best regards HAHAHAHAHAHAHA ROLE not ROLL loevy thanks for your valuable point

[@tesfayebelay4860]

god blessed you

[@IS-77]

Thank you so much brother

[@HaseebElectronics]

best regards

[@anlpereira]

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.

[@HaseebElectronics]

best regards normally for 12 volt output 12 volt or 11 volt can be used

[@nipunlakshandaluwatte9168]

Thanks, brother.. well explained.

[@melplishka5978]

Ty. Very well explained.

[@HaseebElectronics]

You're welcome!

[@aldotambozzo9578]

Very useful video

[@HaseebElectronics]

thanks a lot

[@temyraverdana6421]

Thanks, very clear explanation!

[@HaseebElectronics]

best regards and special thanks

[@ezeoluchukwu5104]

This a nice tutorial and educative. Please can u make tutorial on how to wind smps transformer or if the tutorial is here please the link

[@fakhrealam2008]

Very good.

[@HaseebElectronics]

Thank you for your kind words. 😊

[@vijayanathanstephen9308]

👍👍👍

[@HaseebElectronics]

it is my pleasure

[@songzhengchen451]

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?

[@HaseebElectronics]

resistor connected across pin 1 & 2 is called bias resistor, it works as protection resistor to the LED, capacitor is used as bypass capacitor for protection from false switching as it is isolating device so there is must not be any connection between pin 1 & 3. if you experienced in some un-isolated circuit, i don't know about it. as i never observed it.

[@songzhengchen451]

@@HaseebElectronics Thanks for the reply. After googling, I find the parallel RC network I mean is the application of a Type two compensator.

[@Fazlubd]

brother Haseeb thank you for your tuto i just request you about MPPT solor charger and ups

[@HaseebElectronics]

thanks a lot i will try my best to arrange for mppt

[@hkbtharanga1]

Good thanks

[@HaseebElectronics]

thanks a lot

[@samueldavies646]

amazing tutorials thank you! how do I determine the value of the components like Rled, and the capacitor across pin 3 and 1 of tl431?

[@ankur0077nca]

Make video on voltage devider network and pull up push down resistor

[@HaseebElectronics]

sure i will make a detailed video on pull up and pull down resistor

[@rachidakli3555]

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 > 2.5 volts).

[@HaseebElectronics]

yes it is controlled by voltage divider network. in voltage divider network we have two resistors. when 2.5 volt will arrive at pin 1 of TL431 (reference pin) at that time the TL431 will conduct only. so the voltage divider network is connected between the output pins, it will sense the 12v out. if less it will decrease the reference pin. if the voltage will go above than 12 volts, it will provide more conduction to provide more light in input LED and optocoupler output tranasistor will saturate and it will inform PWM controller if output voltage are un-controlled , in the that case the auxiliary winding will provide OLP over load protection (please check video number 525 for aux winding role)

[@Elikaee]

Greetings, a few days ago I exactly faced this question and surfed everywhere on the Internet to find the answer; thank God, through this reply I could get the picture of feedback's reaction to the exceeding output voltage. So thank you both.

[@aliduadam2761]

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 work.some 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 purpose.thank

[@خالدباشميل-ب9و]

thank you

[@HaseebElectronics]

You're welcome

[@familydonmiguel2688]

🤗👍🏻

[@HaseebElectronics]

best regards and special thanks

[@jimmycollege3851]

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

[@mumbaiverve2307]

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.

[@md.kayesuddin5137]

many many tnx......

[@electroniquepassion]

👍🌹

[@HaseebElectronics]

Best regards

[@eegayeyet]

very informative sir..keep on sharing by the way can i replace the opto coupler by a different model sir because the part number is erase

[@HaseebElectronics]

Yes you can sometime it becomes difficult due to mismatching of CTR (output current vs input current) so it causes to some trouble in output regulation

[@drameriemmanuel1187]

Could you please do us video about ups inverter charging section

[@husainkarta8148]

Thanks my friend for your support pleas lneed help output of smps 7 and 14 and 26 and l measured the voltage between refernce and anod to tl431 is 2.3