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- Опубликовано: 3 июл 2024
- i explained How to calculate SMPS design discontinuous flyback Switch Mode Power Supply in power electronics very easy. i am am going to calculate SMPS circuit using UC-3843. in this circuit UC1842 UC1843 UC1844 UC1845 C3842 UC3844 UC3845 MC38C42 MC38C43 MC38C44 MC38C45 MC18C42i can be used after making a slight change in VCC voltage. i will calculate all components in the UC3843 SMPS schematic, i distributed the power supply in blocks, so that it will become easy to understand. discussed how to draw a schematic circuit diagram of switch mode power supply and i explained practically. most of the smps designs buck converter, buck boost, forward, feed forward converter, half bridge full bridge converters are same just the switching topology differs. after watching this series of videos you will be able to:-
how to #design #calculate #smps
how to understand smps design calculations for discontinuous flyback function of switch mode power supply, in this tutorial i draw the circuit diagram and placed components and made wiring of the components.
how to repair switch mode power supply when short circuit at input
how to calculate dc buss bar / rail and bulk / main dc / filter capacitor
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Superb piece of information. Accept by accolades. You are one of the best teachers I found on RUclips. I am your fan from India.
Best regards and special thanks
very useful information. Thank you for posting such a presentation.
Thanks for sharing this video. watched full and liiked it
السلام عليكم بارك الله فيك على مشاركة العلم وجعله الله في ميزان حسناتك
Very good and complete. Thannk you.
Nice share friend
Thanks for your effort impacting your knowledge to us thanks
this a great help teaching this formula how to solve it for the students, thank you my friend
Beautiful and excellent demonstration, a very detailed oriented and well explained. Thanks for sharing such a nice video. Keep it up brother.
Excellent explanation!
Awesome knowledge. Great work as always. Sending you lots of love & support from Australia 🇦🇺❤️
بارك الله فيك
اللهم زد في علمه و بارك له فيه و اجزه عنه خير جزاء
Aameen. thanks for checking
Sir ur excellent work , Any One person who relate this job,when he play ur video.he can't stop or skip any part of ur video,thank u for this informative,and good video.
Many many thanks
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Just amazing 👍👍👍👍
Sir thanks nice learning method god bless you
I love your explainations, very instructive, thanks
best regards
MashaAllah good job dear 👍
Very good informative video
Thanks for shearing knowledge excellent video my brother I watch and like thanks
Podoba mi się film. Życzę sukcesów.
Excellent video tutorial. You cleared all my concepts.
it is my pleasure
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Mashaalha good information lik168
Mashallah amazing video sir 👍
nice job dear bro thanks for sharing
stay blessed
Sir excellent video , keep it up
Thanks for sharing good information 👍
Informative and nice video
Excellent video. I was to put a request for a series of video where we can get to know designing a power supply of our own. So I'm really very excited for your upcoming videos with on this topic. Thank you very much for your help and support. Please keep it up.,
Very knowledgeable video
Interesting video friend
Very nice video Thanks for shareing Stay connected
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Thank you for sharing your knowledge 🙏
best regards
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lk 105
great beautiful video allah bless u
Very Good Work
Wa aliqumuslaam good work brother
Nice informative video bhai
Thanks for Sharing Bhai
Ur great sir
Really enjoy the full tutorial. 🌹🥀💞
It is really useful for the students of electronics. 👍
جزاك الله وشكرا
So educative asalam aliykum
Thank you 😊
Very good teacher 😊
You are welcome!
Very good,❤❤❤❤
Thank you sir
Excellent
Liked and subscribed …Brother you have the best SMPS explanation channel in English ( IMHO ) . Thanks
Thanks and welcome
Great !
Haseeb super!
amazing
Walikum Salaam Dear Brother Like Video Have A Blessed day # 29
Thank You
good ...
Excellent 👌👌 bahi
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Frnd
Thank you
Walekum Salam brother
👍
Nice👍👍👍👍
Wa alaikum asalam first like dear brother 👍
Boss I want to learn to say thank you in your language. Because than the less you deserve from Us.
Shukriya (thanks)
please accept my best regards and special thanks
Shukriya electrónics Master
Very Interesting video!! Like 119
Hi Sir, I hope you can mention along the way how to vary the output current in design from say 5Vdc at 2 Amp to the 5 Vdc at 3 Amp. Which components require the replacement, etc for that purpose. TQ, you simply the best
Asalam aliykum sir nice explanation sir
Wa alaikum salaam
thanks a lot
Nice explanation. Please make video on i/p filter and protection crt calculation.
Bien 👍
اسلام و علیکم بھائی جعمہ مبارک
Super sir...your next calculate EE42/20/21 - 12 TO 35-+ DC INVERTER
Hi, there us a formula from TI for a 12v 4Am SMPS
Cin= 2×Pin ×(0.25+1/pi ×ArcSin(Vbulk(min)/√² ×Vin(min))) / (2×Vin(min)² - Vbulk(min)²)× fline(min)
Where :
VIN Input Voltage 85 --115/230 -- 265 VRMS
fLINE Line Frequency 47 --50/60 -- 63 Hz
VOUT Output Voltage IOUT(min) ≤ IOUT ≤ IOUT(max) 11.75 -- 12 --12.25 V
VRIPPLE Output Ripple Voltage IOUT(min) ≤ IOUT ≤ IOUT(max) 100 mVpp
IOUT Output Current 0 -- 4 A
η Efficiency 85%
My approach is:
First, the denominator:
2×Vin(min)² - Vbulk(min)² × fline(min)
(2 × 85² - 75² ) × 47
= 414775
Second, the numerator:
2 × Pin ×(0.25+ 1/pi × ArcSin(Vbulk(min)/√2 ×Vin(min)))
2 × Pin ×(0.25+ 1/pi × ArcSin(75/ √2×85))
2 × Pin ×(0.25+ 1/pi × ArcSin(75/ 120.208))
2 × Pin ×(0.25+ 1/pi × ArcSin(0.6239))
2 ×Pin ×(0.25+ 1/pi × 38.6029)
2 ×Pin ×(12.5377)
But at the end the power is very huge. That is:
126 = 2× Pin × 12.5377 / 414775
Pin = 2084183 watt
My questions are:
1. Is the calculation on denominator correct?
2. Is the calculation on numerator is correct?
3. If correct, is power in that huge?
Assalam o alaikum. I find it very interesting. Could you tell me how many parts of this SMPS Design are there, as they are not in sequence I think. Kindly mention video numbers related to these
W Salam brother
Sir, upto how much range of power, we can use smps flyback topology, if we need more power, which topology we can use. and i am eagerly waiting for part 3.
Any videos which continues the flyback series and calculates the output capacitor?
Sir can you please make an video regarding to compensation loop of flyback smps.
sure i will try my best to share CTR and compensation method for compensation and feedback looping
Thank you very much,
can you give the some idea about distributed capacitance in transformer at high frequency and high KV secondary,how to reduce also please give some idea.
in transformer design i am selecting the core by Area product method, in that i am fixing the J value initially by 200 amp/cm2, then i choose the core is it correct method of i am going
please confirm it.
Thank you.
I get a little confused. Do you have a specific playlist just for this flyback design listing the videos in order?
Sir ...flyback calculation and desing...and flyback driver calculation ...ak video plz
Can you make a video for design using simulation software and calculation.
Sir heatsink par video bnao
Thanks for your informative video. I have one question. According to your Bulk capacitor value calculation required value is very high. Normally we found very less capacitance value in practical circuit. As example it is seen for 48W output power, input capacitor value is 47uF, or 68uF. For 65W power supply, it is generally max 100uF. Can you please share what's happened there?
I think the step by step approach is to establish the required capacitor value and it's WVDC rating, although for selection ripple is also very important. For ripple at 100Hz one design goal is to minimize the heat generated within the bulk capacitor due to internal ESR (which depends on which capacitor you choose, from what manufacturer and how it is constructed, you cannot just go by the value calculated).
So there is a tradeoff between the capacitor size and its ripple rating or depth (with some added margin because this capacitor has one of the highest failure rates in the design). The choice of 15% ripple for off line is interesting because it was given as a rule of thumb although what is acceptable is the overall design of the capacitor itself.
Also, given as a rule of thumb, was an overall power efficiency of 80% (which is reasonable). If you have a thermal camera and examine different capacitors (of the same value and voltage rating but different vendors and types) in operation you can immediately see the heating effect of ripple. You can just simulated the load (converter) with a resistor. Some, input capacitors will get very hot (above 80 C) other will run a lot cooler depending on ESR. This is why the recommendation was for a 105C capacitor and not an 85C rated capacitor the author wanted some margin. But, in actuality, the capacitor you choose at a given worse case supply power should run as cool as possible in order to maximize it's life (temperature versus MTBF). So, what you will find, if reliability is a factor, the capacitor value will be very large in comparison to the calculation.
Also, the WVDC rating of 400V assumes to a certain extent that any fast AC line transients beyond the surge voltage rating of the capacitor is minimized on the AC side using a MOV. So, in a way the design is assuming the rating of the capacitor will not be exceeded.
And, it was also mentioned that the capacitor would have a current surge (supply surge limiter) using a NTC Thermistor. Which minimizes the surge current into the capacitor.
Sir, you are using 3843 ic. Will this calculation change if we use some different ic.
6:08 - Setting the frequency to 200 kHz instead of lower will minimize rise time, as you said. But, since the higher the frequency will be the shorter the rise time will be, what would be the drawback if you wanted the frequency to be as high as 500 kHz? Where would you draw the cutoff line?
I agree, I wish he spent a few minutes on all factors deciding the frequency... not just rise time.
Topología full brigde
Hello Sir, why did you consider Vdiode : 1V? We have 2 diodes right? I believe 0.7V for each diodes right? Pls clarify me. Thanks in advance
Hi sir
In bulk capacitor calculation, if we reverse calculate with 68uF capacitor value the ripple voltage will come as 60V.
Is the voltage value taken shoul be Vpeak - Vdc min hole squre??
Hi , what is reflected voltage?
How do you calculate the out put capacitor
Sir how should we select mosfets and igbt ?
Can we use the over value for the capacitor rather than the calculated value .... I mean calculated joule increase up to more than 50%. My expectation is capacitor life & life expand. Is it correct
Sir, what is the battery charging methods
Good day from Venezuela south America. I am engineer in electronics . I am interested on this video to design SMPS power supply . I suggest to you if may I say : what don't you use a magic black board to do this tutorial about designing this power supply . I can not see what yiu write on the paper . It is difficult to get all the information from the paper you are using . The numbers and letters are to small .
Kaya 24v 5 amp SMPS ko 36 volt me convert kar sakte ha reference voltage me changes karke aur output ke capcitor ki working voltage Wale lagha kecircuit me
Why did you choose current mode smps controller