Hello once again brother Haseeb! Another Excellent amazing video. Very well presented and you covered every detail and answered the few questions I did have about “Flyback switching power supplies”. You are truly a gift to the world of electrical and electronics to those who have a sincere desire to excel in this field weather it be as a technician or on the level of engineering. I can appreciate this particular video because it was the “Flyback switching power supply” that gave me my introduction to switching power supplies 12 years ago when I attempted to repair my 21 inch CRT JVC color receiver. JVC on it’s web page had a very detailed description of the theory, physics and workings of it’s “Flyback power supply “. It took many re-reads but I grasped the concept. The actual control of the amount of energy needed stored in the magnetic field being switched by a mosfet power transistor through pulse width modulation at the command of the amount of feedback via TL431 and opto coupler. With the help you have provided by going into deeper detail as to how the TL431 is more of a programmable voltage regulator, the snubber network and power factor correction and all the detail calculations have truly made me better and more confident. Thank you brother!
Namaste Haseeb bhai . Me India se hu . Mera naam Vipul jani he . Me aapke sabhi videos bade gour dekhta hu aur aapse kafi kuchh shikhta bhi hu . Mera khud ka electronics items ka repair workshop he . Pr aapse ek gujarish he ki aap hindi ya urdu Me bhi videos bnaye to mere jaise kai sare Indians ko bhi aapse jankari malum ho . Aapke videos bahot details Me hote he . Aur aap ko videos Me bahot like krta hu . Bhagvan aapko aur aapki family ko khush aur salamat rakhe ye meri ishwar se dua he . Thank you Haseeb bhai .
नमस्ते, भाई, मैं आपके प्यारे संदेश के लिए सलाम करता हूँ। यह मेरा अंग्रेजी चैनल है, मेरे भारतीय और पाकिस्तानी भाइयों के लिए, मैं अपने वीडियो अपने उर्दू चैनल ("हसीब इलेक्ट्रॉनिक्स उर्दू haseeb electronics urdu") पर साझा करता हूं, आप उस चैनल की जांच कर सकते हैं, उस चैनल पर मेरे सभी वीडियो उर्दू भाषा में हैं। विशेष धन्यवाद और शुभकामनाएं
Thank you , I learn more with each video of yours that I watch. I was wondering why the transformer has extra secondary windings, now I have one reason, thankyou
Dear , I love your way of explaining . Kindly clear the design aspect of aux winding also. The cap , once started chip , voltage will also appear on aux winding and it will hold the current to chip. Cap will start discharging only when aux winding is unable to provide enough current . So what is design aspect of aux winding. Thx.
Very usefull technical information, seen a lot of search about smps, kindly more detail related to bias winding. How to generate voltage as i know is dedicated winding only. No connection to primer and secondary at transformer, thak for replay or next video
Yes sir I know that question and I have to discuss that. If you trust, I have more than thousand questions to be answered, and the every day I receive a lot of numbers of questions I have a very busy time in my office as I have a big project to manage. I will try my best to discuss your question. I apologize for a very late
JZAK ALLAH JNAH ALFIRDOOS MR HASEEB. My wondering is that ok when IC take voltage from startup resistor first then when IC work so it take voltage from axillary winding, where the voltage coming from startup resistor goes into the resistor so voltage drop so heat dissipated in my head its like to voltage head to head i need to understand and i hope you understand me because i have project to do in my university
Thank you very much again!!! But can I ask shouldn't be R= Vin-Vcc/Icc, being Vcc the voltage consummed by the IC, like when we calculate the R for a Led? And, when it comes about the UC3842, how can 16 volt turn it on, since you've told that it has a 34 volt internal zener diode, shouldn't the Vcc voltage be greater than the zener voltage? I ask you this because I've been studing the UC38xx data sheet and noticed this. Thanks a lot; this channel is answering me a lot of questions. I really appreciate you tutorials. I'm always looking forward your videos.
you are welcome. all these points I have to discuss in upcoming video to discuss internal zener and external zener circuits (that is the 2nd part of this video) amps controller have to working regions 1. startup 2. normal working 1. in startup the current will use to charge the hold up capacitor. in tht case we have to use R=Vin min / Istartup. because I'm startup the vcc pin will start from zero volt upon reaching at 15 to 16 volt at UVLO-on threshold, ic will start switching. then it's uvlo circuit will enter in operation mode, I WILL EXPLAIN IN UPCOMING VIDEO the internal zener is 34 volt. that is used as a voltage clamp for protection. to protect this ic to reach at extreme limit (34 volt) an external zener for range 18 to 28v is used at vcc pin. that will protect ic from damage. we will discuss in upcoming session
@@HaseebElectronics My sincerest thankful; You answer very fast. My respect for taking your time to share knowledge that cost you hard working and many time.
Sir you create videos that we dont find anywhere on youtube. Haseeb sir you have covered major calculations on every components. I have a situation. I have an smps where the output capacitor is blown completely. It is 12v 4amp smps. How will i know how to calculate the capactior Volt and Micro farad for this smps? I hope you understood my question. Haseeb sir mein yeh jaanna chahta hu ke kaise hum capacitor volt or microfarad decide kare circuit mein. Many times same volt capacitor we get but different micro farads. Can you throw light on this topic?
I used this method for start up resistor calculation and the IC didn't start up because all the voltage dropped in the resistor just few millivolt passing hence using the formula R = V/I simply means the voltage drop accross the resistor must be equal to the product of current flowing through the resistor and the resistance of the resistor. It should be: R = [(Vin min - Vic)/I] I is the startup current
Excellent video as they all are. Question...with regards to power, and dissipation of the startup resistor, aren't we only talking about a period of milliseconds, where current flows only from the startup circuit? I mean, once the controller starts, the aux winding creates a similar voltage, and the bias across that startup resistor goes o near zero, dissipating almost nothing, correct? Pardon me if I missed it, or misunderstand the issue. Also, I noticed many designers like to stick with 1/4 watt resistors, so they series connect 2 or 3 or 4 to spread out that startup dissipation, I guess it's cheaper.
Hello, very interesting with good calculations. My question is: how many volts will be at the VCC capacitor and how to calculate the voltage drop from 320VDC to VCC since i see only one resistor and no voltage divider ? thanks.
blank numbers ka problem hota he check video number 372 pcb per ic ki pin ko dekh ke is ic ka number maloom kar saktey hein us site per jaa kr data enter karein aap ko is ke equivalent number mil jaaein ge
Hello haseeb sir, I m a big fan. I m stuck with a circuit of prestige induction heater in which ap 8012 sw is supplied with 320 v DC and 1,2 pins are connected to transformer primary winding. Please check this out
![[396] 400V to 24V SMPS Circuit Reference Design](http://i.ytimg.com/vi/K9v1PzaBA5I/mqdefault.jpg)
![[396] 400V to 24V SMPS Circuit Reference Design](/img/tr.png)
Hello once again brother Haseeb! Another Excellent amazing video. Very well presented and you covered every detail and answered the few questions I did have about “Flyback switching power supplies”. You are truly a gift to the world of electrical and electronics to those who have a sincere desire to excel in this field weather it be as a technician or on the level of engineering. I can appreciate this particular video because it was the “Flyback switching power supply” that gave me my introduction to switching power supplies 12 years ago when I attempted to repair my 21 inch CRT JVC color receiver. JVC on it’s web page had a very detailed description of the theory, physics and workings of it’s “Flyback power supply “. It took many re-reads but I grasped the concept. The actual control of the amount of energy needed stored in the magnetic field being switched by a mosfet power transistor through pulse width modulation at the command of the amount of feedback via TL431 and opto coupler. With the help you have provided by going into deeper detail as to how the TL431 is more of a programmable voltage regulator, the snubber network and power factor correction and all the detail calculations have truly made me better and more confident. Thank you brother!
Best regards and i am thankful for your valuable appreciation. your words are a valuable asset for me. stay blessed
please accept my best regards
Namaste Haseeb bhai . Me India se hu . Mera naam Vipul jani he . Me aapke sabhi videos bade gour dekhta hu aur aapse kafi kuchh shikhta bhi hu . Mera khud ka electronics items ka repair workshop he . Pr aapse ek gujarish he ki aap hindi ya urdu Me bhi videos bnaye to mere jaise kai sare Indians ko bhi aapse jankari malum ho . Aapke videos bahot details Me hote he . Aur aap ko videos Me bahot like krta hu . Bhagvan aapko aur aapki family ko khush aur salamat rakhe ye meri ishwar se dua he . Thank you Haseeb bhai .
नमस्ते, भाई, मैं आपके प्यारे संदेश के लिए सलाम करता हूँ। यह मेरा अंग्रेजी चैनल है, मेरे भारतीय और पाकिस्तानी भाइयों के लिए, मैं अपने वीडियो अपने उर्दू चैनल ("हसीब इलेक्ट्रॉनिक्स उर्दू haseeb electronics urdu") पर साझा करता हूं, आप उस चैनल की जांच कर सकते हैं, उस चैनल पर मेरे सभी वीडियो उर्दू भाषा में हैं। विशेष धन्यवाद और शुभकामनाएं
@@HaseebElectronics thanks Haseeb bhai . Khuda tumhe salamat rakhe .
Aameen
Thanks Bhai ji
Very useful information Sir Thanks for sharing this knowledge to us
thanks a lot. best regards
Thank you , I learn more with each video of yours that I watch. I was wondering why the transformer has extra secondary windings, now I have one reason, thankyou
it is my pleasure. it will become more clear in upcoming videos, because i share the lecture step wise. stay blessed
I will always see all video and video also very important for me and all my friends.
it is my pleasure
Dear , I love your way of explaining . Kindly clear the design aspect of aux winding also. The cap , once started chip , voltage will also appear on aux winding and it will hold the current to chip. Cap will start discharging only when aux winding is unable to provide enough current . So what is design aspect of aux winding. Thx.
Beautiful information.
thanks a lot
very informative share haseeb bhai
Really amazing to learn real basic. In books, details is scant .
it is my pleasure
Mashallah very informative vedio superb work well done good morning 🌄
Great sharing have a nice day love yours performance
Thanks so much
Very Good Information Brother. Keep it up.
🙏good teaching 🙏
ماشاءاللهBeautiful video
thanks dear
Mashallah tabark Allah thank you bro. About this great information now I understand this component's work
You are welcome
best regards
Very interesting. Thanks Haseeb.
best regards and special thanks
Very usefull technical information, seen a lot of search about smps, kindly more detail related to bias winding. How to generate voltage as i know is dedicated winding only. No connection to primer and secondary at transformer, thak for replay or next video
ماشاء الله
اللهم بارك بالتوفيق
Jazaak Allah khair
Awesome.
Great teaching
best regards
@@HaseebElectronics do tutorial on EMI filter
Sure I started on smps and we will complete it
@@HaseebElectronics okay thanks
thank you very much for explaining in detail.
You are welcome!
Very informative
best regards
nice job dear bro, big like
stay blessed
Many many thanks
So nice explanation
Thanks and welcome
Excellent information about vcc resistance
Very detailed.....thanks sir ji....
Very very thanks for informative video.
Most welcome
Thanks for your convenience
اسلام اعلیکم اللہ آپ کو سحی سلامت رکے کوچ دینو سی آپ کے اوردو ویڈیو نہے اتی
و علیکم السلام و رحمۃ اللہ و برکاتہ
آج 9 بجے ویڈیو آئے گی۔ ان شاءاللہ۔
کچھ مصروفیات کی وجہ سے ویڈیو بنانے میں مشکلات تھیں
Thanks, incredibly useful lesson
You're very welcome!
Informative share thumbsup dear
Best regards
Another amazing presentation 💌
Big Like 👍
thanks bhai
mashaAllah , good work , i like , nice share
Jazaak Allah khair
Many many thanks sir
Most welcome
thanks very much 🙏🙏🙏
Always u r impressive
it is my pleasure, best regards
Good day. Great informative upload
thanks a lot dear sister
Helpful video lk👌
excelent analysis.thenks professor.
Special thanks ❤️
@@HaseebElectronics
Giorgos your professor hasn't answered my question yet past one year
Yes sir I know that question and I have to discuss that.
If you trust, I have more than thousand questions to be answered, and the every day I receive a lot of numbers of questions
I have a very busy time in my office as I have a big project to manage. I will try my best to discuss your question. I apologize for a very late
@@shafi.j ask the same question to your professor
@@HaseebElectronics
Thanks
just perfect and informative
Special thanks ❤️
Great video as usual my friend!
special thanks
Thank you so much
You're most welcome
Thanku sir🙏
Good job, my friend
Great tutorial with great exlpanation my friend.
Good job 👍👍👍
Semangat kak sukses selalu ya kak 🙏🙏
Lk 234 good job. 👌👌👌
Jazaak Allah khair
Jazaak Allah khair
👏👏👏
Thank You Sir
best regards
MashAllah bhai
best regards
Good sharing, big thumbs up 👍👍💯 see you around, have a wonderful day 😊
JZAK ALLAH JNAH ALFIRDOOS MR HASEEB.
My wondering is that ok when IC take voltage from startup resistor first then when IC work so it take voltage from axillary winding, where the voltage coming from startup resistor goes into the resistor so voltage drop so heat dissipated in my head its like to voltage head to head i need to understand and i hope you understand me because i have project to do in my university
Good evening
please check video number 954 and if you have any question, you are welcomed
Imagine how good this person did in his finals
best regards
Great informative video shared brother, like always, keep it up...
Jazaak Allah khair
Masha Allah 👍👌🌹
Very nice analysis Thanks brother...
So nice of you
Good discussion video thanks for sharing! 😍👍
Watching for the second time your so good in math sir i hate math
special thanks for your valuable comment
never hate math, it is in our life like " *blood in the body"*
Very nice video
Very good video. Very useful. Thank you very much.
You are welcome!
Thanks.
it is my pleasure
BIGG LKKKKK#103
very informative video
KEEP IT UP
Good sir
best regards
Thank you very much again!!! But can I ask shouldn't be R= Vin-Vcc/Icc, being Vcc the voltage consummed by the IC, like when we calculate the R for a Led? And, when it comes about the UC3842, how can 16 volt turn it on, since you've told that it has a 34 volt internal zener diode, shouldn't the Vcc voltage be greater than the zener voltage? I ask you this because I've been studing the UC38xx data sheet and noticed this. Thanks a lot; this channel is answering me a lot of questions. I really appreciate you tutorials. I'm always looking forward your videos.
you are welcome. all these points I have to discuss in upcoming video to discuss internal zener and external zener circuits (that is the 2nd part of this video)
amps controller have to working regions
1. startup
2. normal working
1. in startup the current will use to charge the hold up capacitor. in tht case we have to use R=Vin min / Istartup. because I'm startup the vcc pin will start from zero volt
upon reaching at 15 to 16 volt at UVLO-on threshold, ic will start switching. then it's uvlo circuit will enter in operation mode,
I WILL EXPLAIN IN UPCOMING VIDEO
the internal zener is 34 volt. that is used as a voltage clamp for protection. to protect this ic to reach at extreme limit (34 volt) an external zener for range 18 to 28v is used at vcc pin. that will protect ic from damage.
we will discuss in upcoming session
@@HaseebElectronics My sincerest thankful; You answer very fast. My respect for taking your time to share knowledge that cost you hard working and many time.
Always welcome dear friend
Kindly do a thorough explanation or tutorial on areas to focus on any component datasheet I always confuse on the area of focus on any datasheet
Great Video!! Stay connected.
well explanation
special thanks
Very informative video
Good morning 🌅🌄
Sir you create videos that we dont find anywhere on youtube. Haseeb sir you have covered major calculations on every components. I have a situation. I have an smps where the output capacitor is blown completely. It is 12v 4amp smps. How will i know how to calculate the capactior Volt and Micro farad for this smps? I hope you understood my question.
Haseeb sir mein yeh jaanna chahta hu ke kaise hum capacitor volt or microfarad decide kare circuit mein.
Many times same volt capacitor we get but different micro farads. Can you throw light on this topic?
جميل جدا مساء الجمال
thanks a lot. best regards
Good Video Mr Haseeb. Can you please tell us how to shutdown system in case overvoltage comes from input, like continuous 275V AC?
Great Video as Always Thanks Friend !!!
I used this method for start up resistor calculation and the IC didn't start up because all the voltage dropped in the resistor just few millivolt passing hence using the formula R = V/I simply means the voltage drop accross the resistor must be equal to the product of current flowing through the resistor and the resistance of the resistor.
It should be:
R = [(Vin min - Vic)/I]
I is the startup current
Excellent video as they all are. Question...with regards to power, and dissipation of the startup resistor, aren't we only talking about a period of milliseconds, where current flows only from the startup circuit? I mean, once the controller starts, the aux winding creates a similar voltage, and the bias across that startup resistor goes o near zero, dissipating almost nothing, correct? Pardon me if I missed it, or misunderstand the issue. Also, I noticed many designers like to stick with 1/4 watt resistors, so they series connect 2 or 3 or 4 to spread out that startup dissipation, I guess it's cheaper.
Sir ji👌👍👍
best regards and special thanks
Wsalam 👍 wow very nice 👌😘
Sir very good
best regards and special thanks
Sir please explainTransistor based oscillator and drive circuit in smps how it works. Thankyou
Yes please, I'd like this too
@@pcb1962 I am also waiting.
Hello, very interesting with good calculations. My question is: how many volts will be at the VCC capacitor and how to calculate the voltage drop from 320VDC to VCC since i see only one resistor and no voltage divider ? thanks.
best regards. yours question will answered in upcoming session of startup resistor
Very nice
Thanks for the detailed explaination. Can you please share the link of the next part. I could not find.
Very nice .. helpful information
So nice
Thanks for sharing good knowledge my friend thanks welcome please
thanks a lot
Sir the start up resisistor is separte from the snubber circuit sir?
yes dear
it is a separate resistor, it is connected between +ve dc rail and vcc pin of the smps controller
Goodtiching karte hai 👌👍👍👍👌👌👌👍👍
thanks
Nice sharing. Stay Connected #TeenyTots.
👍
thanks a lot dear friend
Is same formula used for Constant current power supply ?
Sirji,new aspee machine adapter mein Jo input section mein 8 leg ic hai,uski number kya hoga.number blank hai
blank numbers ka problem hota he
check video number 372
pcb per ic ki pin ko dekh ke is ic ka number maloom kar saktey hein
us site per jaa kr data enter karein
aap ko is ke equivalent number mil jaaein ge
Sir can u explain how to organise components placement in pcb design for proper functioning of SMPS.
In most of the circuits, its value is between 150k to 200k 2W
Hi friend how are you. I hear a noise (like ratel snack) from hover board charger. 42 volt output. And no charge even the lead is green
👌👌
👍👍👍👍
thanks a lot
👌👌👍
it is my pleasure
Hello haseeb sir, I m a big fan. I m stuck with a circuit of prestige induction heater in which ap 8012 sw is supplied with 320 v DC and 1,2 pins are connected to transformer primary winding. Please check this out
Sir my samsung charger three 22 mega ohm resistor in series for startup....why pse...