{829} What Is Flyback Converter Topology
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- เผยแพร่เมื่อ 1 มิ.ย. 2024
- in this video {829} what is flyback converter topology in switch mode power supply smps, i explained what is isolated flyback converter and how it works. in Flyback Converter topology (FBT), it is a transformer isolated converter based on the basic concept of buck boost topology. In a flyback converter, a semiconductor switch is connected in series with the transformer primary winding. The transformer is used to store the energy during the ON period of the switch, and also provides isolation between primary and secondary side. in normal operation, when the switch is ON for a period of TON, current flows in primary winding and creates magnetic field, but due to reverse direction of secondary winding, the output diode becomes reverse-biased and the transformer behaves as an inductor. The value of this inductor is equal to the transformer primary magnetizing inductance LM, and the stored magnetizing energy from the input voltage source VIN. Therefore, the current in the primary transformer (magnetizing current IM) rises linearly from its initial value to peak primary current. As the output diode becomes reverse-biased, the load current is supplied from the output capacitor. The output capacitor value should be large enough to supply the load current for the time period TON, with the maximum specified drop in the output voltage. At the end of the TON period, when the switch is turned OFF, the transformer magnetizing current continues to flow in the same direction. The magnetizing current induces negative voltage in the dot end of the transformer winding with respect to non-dot end. The diode D1 becomes forward-biased and clamps the transformer secondary voltage equal to the output voltage. The energy stored in the primary of the flyback transformer transfers to secondary through the flyback action. This stored energy provides energy to the load, and charges the output capacitor. Since the magnetizing current in the transformer cannot change instantaneously at the instant the switch is turned OFF, the primary current transfers to the secondary, and the amplitude of the secondary current will be the product of the primary current and the transformer turns ratio,
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00:00 what is flyback topology, and how flyback converter works
00:53 flyback converter topology block circuit diagram
01:38 flyback circuit explained - วิทยาศาสตร์และเทคโนโลยี
Sir, you have gifted me a 100% understanding of the snubber circuit purpose. Thank you!
it is my pleasure
you can also check video number 510 & 284 for more detailed discussion on RCD snubber
@@HaseebElectronics Sir, I certainly will view 510 & 284. Thank you
like mashallah so great flyback converter topology informative video thanks for sharing
Thanks and welcome
@@HaseebElectronics Mr Haseeb if you can do a DC to AC inverter with IGBT [ H Bridge] it will be great, hope to see it soon.
Thanks so much for taking the time to make this video! It really helped to clear up some misconceptions I had about how a fly back converter works. I love all the videos you have devoted to talking about SMPS, as it has greatly increased my understanding of how they work and how to troubleshoot. All the best to you and take care!
well explained thank you and ma sha allah wish you a good luck
Thanks and welcome
The transfer of voltage or more simply the transfer of energy by the methods you mentioned is quite interesting.
Multiple ways of looking at the actions of flyback converter and similar switching methods. Again enjoyed your presentation.
TH-cam hasn't suggested your videos to me in a while. Great video.
best regards and special thanks
Thank you very much brother such a great and simple to understand flyback topology please continue few more videos on same topic related to other topologies if possible
Once again thank you very much and best regards from Philippines 🇵🇭
The video is very informative, thank you very much sir
Amazing video dear friend, have a blessed Sunday 😊
Thank you very much
Very good and useful information sir thanks for sharing this knowledge to us
best regards
Again the way how you explained is amazing. Thank you very much.
it is my pleasure
Teşekkürler efendim. Çok güzel bir video olmuş. Hayırlı günler dilerim.
I've had the same question but was afraid to ask. Have a great weekend sir!
Thank you for the explanation, it was easy to understand the flyback concept. I appreciate it very much.
You are welcome!
Sir, nice explanation pricis clear to understand!!!
it is my pleasure
Thank you for the video, a very good explanation! Peace and good to You!
best regards and special thanks for your valuable words
Always great to see your videos
best regards
Hello from Belgium.
thank you for your videos which help me a lot as an amateur electronics engineer.. See you in the next video👍🏼👋
Excellent thanks for sharing this informative video
So nice of you
Informative vedeo, detailed vedeo. Thank u so much God bless you
Thanks and welcome
Always brilliant always master you are wonderful thank you
Great knowledge sir. Very very thanks for this informative video
it is my pleasure
Happy Sunday Friend Like So Much This Video
best regards
I want to thank you for your dedication thank you for teaching electronics
It's my pleasure
You deserved my subscribe and like thank you
Very well understood. 👏
Thankyou.
You're most welcome
mashallah Sir your video is very informative we get to learn a lot God bless you
thank you very much
🙏
You're most welcome
Great job ......thanks👍👍👍👍👍
best regards
Brilliant. How about the alternative topologies, their strenths and weakness' for another video?
very well said.
beste Mann .. vielen Danke bro
Thank you very much!
best regards 💕
Good video sir g
best regards
وعليكم السلام ورحمة الله وبركاته بوركت يا أخي
الله يسلمك و يسعدك و يبارك في عمرك يا اخي الكريم
Thanks prof mashallah good TH-cam channel 👍 👍
best regards
Sehr gut erklärt danke
herzlich willkommen, lieber Bruder
Very impressive......
Thank you so much 😀
ESallam Allikoum !Explication magnifique !la traduction automatique laisse à désirer mais cela ne m' a pas empécher de suivre .MERCI ! ALGERIE
Love the videos and I am glad you did this one. I have been working on that ate my lunch. It is a dual voltage psu using both a top254 on one transformer, and a ucc28700 to run a fet on the other. Both chips fluctuate voltage at their vcc caps but it seems both opto are working. Ideas please?
Thank you very much
You are welcome
Thank you very much 100%
You're welcome!
Excellent. So, I can understand why one might use a flyback, when the supply source is already DC (portable battery device) and the circuit requires AC. What are the circumstances where an AC supply is rectified to DC and a flyback is used to change it back to AC, as in your example? What are the advantages of doing so? Please and thank you.
Salaam. I have a question. Can you continue this circuit by adding a 555 timer to drive the transistor/mosfet and demonstrate it to us ? Just to improve our knowledge .
جزاکم اللہ خیراً کثیرا
best regards
Very good
best regards and special thanks
Alaikumselam ve rahmetullah ve berekat.
Ecellent explanation
Thans a lot bro
Thanks very much for the video! I never realised the coil/transformer has opposite phase. Will you cover other topologies as well?
best regards and special thanks for your support and appreciating words
sure i am planning to cover other topologies in detail
I always work on flyback smps especially ringing choke but my problem is how to calculate the frequency. How do I calculate the frequency to enable me determine the turns of the coil both at primary, secondary and axillary windings. I can't download ExcellentIT in English. Where can I find the entire ExcellentIT in English ?
Very nice information sharing. Thank you sir. Please sir explain ne 555 ic function.
good video as always teacher can explain how the UC3854N circuit works
Thanks sir
most welcome bhai
Great! Can you explain half bridge the same way?
Nice video Sir
Please explain tny 288pg ic full circuit specially the zenner diode which is used 1st pin to source (what voltage of that zenner diode is)
Hello Mr Haseeb, thanks for the good explanations to all about electronic boards, but i am borrowing if you can explain or show me how to fix the dvd home theater DAV-DZ520K, it doesnt have 31v output and it uses str-f6168!. Thank you Sir.
I wound a transformer for my 12V to 300V flyback but I wound the primary and secondary in the same direction.
The start of the primary winding is connected to the 12V input. On the secondary side the start of winding is connected to ground.
It seems to work fine but is this wrong?
yes it is also good. actually it needs keep secondary, during conduction of the switching device.
so your method is also perfect. in this way it will work normally
God Bless
Thanks
Always welcome
God bless you and your family ❤️
thanks for the video, can you make one, how to properly calculate snubber circuit values, i.e. capacitor and resistor values ?
I believe "topology" should only be used when referring to multi-layered PCB circuitry while "circuitry" is applicable in standard schematics.
Sir how a computer ups works? .
Please make a video about that.
With repairing tips.its system ic
Is programmable?
I can't find your video tutorial on half bridge and full bridge converter kindly make it available
I have designed 12W constant current flyback converter, with 12.5V/ 850mA output. (PWM IC with Fixed frequency 65kHz.)
Issue is, schottky diode UF5408 is getting heated upto 85°C & checked on oscilloscope the actual frequency is 39kHz (at MOSFET gate, +duty is 15% & -duty is 85%, where as at transformr output +duty is 60% & -duty is 40% )
What must be the problem.??
Hello mister Haseeb. Can you make a video teaching us how to read the code from varistors, NTC, PTC and VDR. Thanks in advance. Andy (Belgium)
friend can u show a link on ur tutorial on how to make smps winding . takes for the good work u are doing here
السلام عليك أخي بارك الله فيك.....عندي شاحينة بطارية....r.c.d أحترق كيف أعرف قيمتها?
Sir why laminate steel isn't used in flyback transformer, what will happen if in AC transformer we replace iron core with ferrite core.
Hypothetical question.
I couldn't understand the purpose of storing energy and then transfer it . Why can't it be transferred like in forward converter. Ultemately what is the benefit ? Kindly explain.
Kindly explain more on unidirection and bidirection
Sir please discuss flyback transformer calculations
What is the function of feed back? Why it is installed in power suply section? Please explain.
Explain please.
th-cam.com/video/fOtdnf75IyY/w-d-xo.html
Hello sir,l would like to ask on how to identify dry joints in smps
Can u please explain LLC topology with same deep information?
sir can u clarify how to calculate RSD value of a circuit
👌👌👌👍
best regards
Why we don't use snubber circuit like we learn( RC) parallel with the something we want to protect i mean here mosfet instead of snubbers or clamb circuit that parallel with inductor.
Imean dispense with RCD
12:03 - What information is needed and how to calculate the values of the RCD components?
kindly check video number 284
❤
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best regards
Mashallah
best regards
why it's only for low energy converting? Why not to just make transformer bigger (unidirectional magnetic field, flyback) and power will increase to 1kW, for instance?
have a anice day good evening
best regards
is iron transformer same as flyback?
iron core transformer (which is being operated at sine wave) that can be used in any configuration.
but when a phase shift is necessary then the dot function (180 degree rotation is incorporated between primary and secondary winding direction)
selâm sevgili kardeşim
bir fikrimi belirtmek isterim...
herşey gibi enerjide (sinyal) üç boyutlu ortamda gerçekleşmektedir! bu yüzden anlatım da üç boyuta uygun bir şekilde yapılmalıdır. yani insan, beyninde üç boyutlu hayal edebilirse veya hayal kurabilirse "öğrenme ve anlama" o zaman gerçekleşebilir !!! birbirimize anlatmak veya öğretmek istediğimizde, kalemle çizerek anlatım yolunu seçersek, üç boyutlu olarak gerçekleşen bir şeyi iki boyutlu olarak anlatmış oluruz ki bu da, ya anlaşılmaz yada ezberlenmiş olur. yani öğrenme tam olarak gerçekleşmez. veya öğrenme yanlış olur!
saygılarımla
👍👍👍👍👍
best regards
👌💐💯😊
it is my pleasure
Sir unidirectional mean ? just explain in few words....
👍👏👏👋👋
most welcome
I make liké without discuss Big thanks
please accept my best regards and special thanks
LED LCD power supply Hindi mein samjhao sari power supply in Hindi mein batao
What happen when there's a leak on transistor?
the transistor leakage causes to dissipate more heat
@@HaseebElectronics could there be a stable output if there's a leak?
If BC ( Base Collector)value is more than BE using diode test, will that be considered a leak?
@@jacksonv1ll836 if BC reading is higher, then the transistor is considered as bad transistor
for more surety we can test it with transistor tester for testing the gain
if the gain is lowered than it must be replaced
ideally if BC resistance is higher
then the collector current will decrease. thus it's gain will low
plz make a repair atx
okay brother
i will arrange it
AOA. why do u have not atx?, used old scrap from market, why do u not visit scrap market atx? dear.
no problem dear brother. i will arrange it soon
Why FLY BACK? What flies? And what goes back? Surely a better name would be UseCollapsingField UCF SMPS.
haha
awesome
but it is named from someone else
actually it transfers energy when the magnetic flux flies back during off period
You know how a swing flies back at you after you push it and it reverse it motion back to you?
Thanks of you.but you dont build and smps in your life .this is problem.just study for theory
best regards