{1205A} Why too high voltage on VCC pin of PWM controller
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- Опубліковано 6 жов 2024
- In this video number {1205A} Why too high voltage on VCC pin of PWM controller. I explained what is reason for getting high voltage on vcc pin of any pwm controller ic
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very informative thanks appreciate your support i think that it is possible to say if the pwm ic is off then the auxilary is off too. if the auxilary is off then the voltage is high up to 54V.
you are right. just watch the ending of the video, at the end there is strong proof for your comment
You missed your calling you should have been a Teacher, your explanations are excellent, one of the best channels for anything to do with power supplies, so glad I found it.
I really admire your patience to explain the completely self-explanatory for someone who knows "basic electronics"
Asalamu alaikum. You are a very patient teacher. Thank you for making these videos
wa alaikum salaam
thanks a lot for your valuable words
Sir this was one of the most informative and educational videos I saw in youtube. Thank you very much!
You are very welcome
Assalamu alaikum. One of the best videos. Thanks. That capacitor is quite dangerous. Normally, capacitors are the No 1 cause of all problems in circuits. And giving it a so critical job, is scary really. The voltage of the capacitor was 35V which is quite low compared to the 330V. Whenever the IC get minimal problem, that capacitor will be damaged also.
Thanks for your clarification .. grate to know how the circuit is working.
One of your best videos thanks
Thank you for sharing your knowledge. Outstanding explanation!
Excellent explanation. I enjoy all your videos.
Hi Sir. I've been a happy subscriber on your channel of atleast a year. Very interesting explanation of a lot of circuits I'm hoping you can make video series of led tv too.. thanks
Very good explanation ❤
best regards
Vidéo très riche en informations précieuses et très utiles.
Mille Merci et à bientôt pour d'autres vidéos.
Very informative video. Thank you very much!
Thanks for this infromative video. Please make a video 'ups no backup problem'
Note: Battery new....
Heya, yes untherstand all of your explanations thank you learned some more
your the best sir,thank you very much.
👌👍
Thank you your video, explaining the possible errors on VCC line. One more case concerning VCC errors: what if the secondary feedback became open, no regulation at all, like optocoupler is damaged? In this case maximum PWM duty cycle happens - 50% on 3844 - resulting maximum voltage on the VCC supply winding? Is this the case when 20V zener diode protects the 3844 and VCC capacitor - if applied - on the VCC rail of 3844 becaming short and shutting down the IC? Keep posting please!
How led tv works? From power supply, mcu, controllers, t con, lcd pannel...etc. Im hoping you can make video series of explanation how everything function. Thank you
This is very goodjob my friend
still watching your teaching videos from Ethiopia 🇪🇹 .Thank u sir 🙏
Many thanks for your detailed explanation Sir. Please Sir do you have electronic book which recommend so that I may broaden my electronics knowledge. If you have please share
Sir very informative video thank you somuch sir I have doubt why they are not using zener diode to regulate startup votage for the ic so that it cannot go beyond required startup voltage.
yumuşak başlatmayı öğren!
learn soft starter!
Sir, is it safe to say that the 50V electrolitic capacitor acts like a proctector in case the IC goes open circuit too. If I understand it right the 50V capacitor dropped the 333V coming through the 100k and 43k resistors? For how long will that 50V capacitor be able to be powered by the 333V before it blows up? Thanks for this info!🙏👏
Thank you
You're welcome
Sir can you explain the difference between smps transformer and pulse transformer because i see on video #592 they used two bjt transistor to drive the pulse transformer and what confuse me the most is whta signal is switching the transistor base is ac or dc and what current is passing between collector and emitter has there is capacitor which we know its blocked dc and ac current, please sir try to review that video on 300w half bridge smps
Hy i got a SMD component that I could not find on internet it bears marking 22J37(SOT-23 size), could you help identifies him?
good morning
can you please its picture to my whatsapp 00962-79-5608616 or gmail id ashraf4ta4
with component id on PCB (D, Q U etc)
Dear Sir
I am looking for MT1008 battery charger circuit. Because it was iquonic circiut. Please help me .
Best regards
Baha
وعليكم السلام ورحمه الله وبركاته ❤
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In this case, we have to change that capacitor or not? Because of that 54 volt on it
I mean, that over voltage, damaged the cap?
önce kondansatörü söküp kontrollerini yapacaksın (Lcr metre !) eğer henüz bozulmamış ise aynı kondansatörü kullanabilirsin 😊
So it seems to be a bad design, just relying on the IC to keep the cap under safe voltage.
Too scary to depend on a capacitor to hold the voltage to a level. Often capacitors are not so reliable.
kapasitörsüz olmaz; çünkü aynı zamanda bulunduğu yere gerekli enerjiyi sağlayan depo görevi de görür !! bir baraj gibi...