5V 2A SMPS - test, teardown, schematic, explanation, improvements
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- Опубликовано: 3 авг 2019
- Today let's take a look at a 5V 2A switching power supply module. Let's test it, draw its schematic, explain how does it work, find its problems and fix them.
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Just wanted to say how much I appreciate the schematics you draw. Really helps understanding how the circuit works. Appreciate your sense of humour as well.
It was more educational than my 4 years of engineering degree.
Thank you. :)
True
It would be a blessing to have him as a teacher when I was (many-many years ago) student
DiodeGoneWild's hand drawn schematics are legendary, they are displayed in a museum next to Picasso... this guy has the knowledge and super patience to actually do it. :D
Probably the Chinese manufacturers are coping it straight from his diagrams (which in turn was originally made in China). lol
@Jad Warren You were right!!!! Nobody gives a shit.
ya and delivery him that back.. to have some more content is endless loop-.-
Big thank you for this reverse engineering. You put a lot of effort to explain it as much as possible and even to improve the circuit. I really appreciate it.
Superb explanation as always. Thank you for going in depth yet again.
I've been investigating about SMPS for a few days now, and this is by far the best explanation on the net. Very comprehensive and easy to understand. Thanks a lot for your time and sharing your knowledge.
Great! Don't be afraid to make long videos! Thanks for the explanation, it was really great this time! It was very good that you have decided to tell people what you think needs to be upgraded! Next time show how you unsolder and solder elements, people will learn how to do it.
That was an excellent breakdown and explanation after watching your videos for two years I almost think I could attempt to build my first very simple switch mode power supply. I’ve built several linear power supplies those are very simple.
I love this guy. Iv learnt more from his videos than any others. He's the only one who goes over everything in the circuit
Do it! It’s challenging but fun. These videos are really helpful.
Hands down the best explanation of a Switch Mode Power Supply. Thank you Buddy 😄
36:09 , love your pwm technique.😂
😂
Its WHM (With hand modulation).
The most detailed explanation of how SMPS works. Recently was fixing one adapter, and it had this 22u/50V capacitor dead, because of which the controller was constantly restarting, just as you described in your video. Subscribed!
A video is never too long as long as it is entertaining. Thanks for your explanations!
“This video is getting quite long.” It’s been not even 40 minutes. What are you talking about? More SMPS analysis like these please. You are a superb explainer. And yes I’ve seen all the previous ones too.
Well if you liked this, he has a website: danyk.cz
I've learnt a lot about transformers and switched mode power supplies from this guy...
Oh-ooo... rabbit hole. Thanks! And thanks to google translate, too. Now my evening is done for 😁
I really enjoyed this video and learned a couple of things along the way.
Thanks for creating such good content!
You are the BEST!! Thank you for this explication
Best explanation of power supply circuit till now.....hats off....just simply love your work
Really impressive. I love your tear downs. probably one of the best on youtube
This was a wonderfully detailed video. I am constantly learning more from your videos.
I watch a lot of EE videos online, but nobody explains this as well as you do. Keep up the good work!
Great depth of explanation.
Great post, keep up your quality videos that are true special lessons!
Perfektne a zrozumitelne vysvetlene, velka vdaka. Konecne som nasiel co som hladal.
Man your utube Channel is great!! I enjoy watching your teardowns and schem, greetings from México
very great work as usual, lot of new information for a good design, thanks.
Well done! I learn much from these videos that show schematics with accompanying explanation.
Excellent video. Thank you very much for going in such detail and explaining things so well.
one of the best you tube video on smps.very painstakingly done. please keep it up
thank you love the way you talk , and ex plane slowly , I just repaired a switch mod supply with the help of your video.
The best video on smps I have ever seen. Thanks a lot 😀
You're awesome, Diode!
Nice and entertaining as always. thank you for these. looking forward for the next 👌🧐
Awesome!!!! Your explanation is like Stroking a Cat, patiently and gently for quite a long time. very very nice .
Love your long Videos! Great explenation, your knowledge is astonishing!
Beautiful explanation man!--Thanks
Great video thanks for all your time and work
This is a perfect reverse engineering example. Fenomenale explanation. Thanks, I learned alom!
A lot, of course...
Power supplies are complex beasts. Thanx for helping me about the purpose of different components.
Very nice video as usual, i didn't understand all but with every video i understand more with your good explanation. Thank you 🙂
Brilliant explanation DGW.
thanks. I've never watched a video explaining so well the feedback circuit of a psu.
love your channel, this is gold.
Man, you are fantastic expert, presenting very well.
Great explanation! Nice work.
Excelent job as always. Thank you.
This video is great! I just recently fixed a 12V 2A SMPS that had a cap fail and dry out. After replacing it I found the diode right next to it was getting super hot just like in this video. I'm looking forward to trying lowering the voltage rating of the diode to hopefully lower the heat and make the caps last longer.
Excellent analysis!!
Man , you need a temperature tester. :)>)))
that would be boring. its more Mc Gyver like with those wet wipes
@@funkolog my stomach hurts if i see finger over these rabish isolations/devices.
I think you should have to gift him.
You don't need it when your finger can measure temperatures like "hot" and "super hot".
Someone from techno companies totally should donate one of infrared thermal cameras already. We have 120k subscribers, what the heck?
Outstanding video!!!!! Thanks!!!!
I love this kind of videos , thanks !!!
Very very good, in the next video you can misure some signals with the oscilloscope (noise, ripple, drive signal, ecc) so we can see the differente between supply with no tuning and with tuning!!
I love your videos!
Superb video as always.
Great video. I love your diy electronic load, I built something similar for testing power supplies.
really expert professional but simple explanations, easy to follow for amateurs like me
I love your stuff that you made years ago..... it reminds me of my own childhood.
The amount of effort put into making this explantion video is superb and very informative as always man we wish u get that thermal camera and i wish success to your channel as i've learned alot watching your videos i might say electroboom is so overated when compared to you man your a legend kudos!
Thank you for this great presentation
Incredible explaining woow thank you
That diode at 6:56 has gone wild! :)
Great explanation, thank you!
Great video. I learned so much.
superb explanation… loved it :)
Perfekt! Highly appreciated!
I love your videos, im waiting for more ;)
Could someone donate him a proper thermal camera please?
Cause he freak me out every time he touch a smps components with bare hand!
Helpful video 👍
I think the sizzling capacitors is probably one of the better demos of why ESR and placement matters. That's insane that its all blimped out afterwards and the diode is oozing god knows what.
Missed the part of him soldering to it, but YT doesn't allow me to edit because Im too non-PC.
Good video! Nice! Sadly I watch it in a blackout with my annoyingly loud generator. But remember, quality over quantity. You didn't need to upload video frequently. Like ElectroBOOM. Less but more quality and professional video. Keep your hard work!
do you live in indonesia?
I've tried watching ElectroBoom, but that dude is outright crazy... too much yelling and acting, not my cup of tea. lol
superb explantion sir. i would this should be vedio played in every engineering class so student actualy understand concept very clear. thanx lot for your dedication and hardwork. cheers to u and your growing channel
Very well done and explained.ty. Great job.
When you covered over the snubber at 21:15 showing how the surge of electricity that occurs when the transistor turns off will cause the transistor to burn out I was reminded about the $25 spot welders that suffered burned transistors (maybe MOSFETS) when the DC power supply became too low.
Youuuu aarreee a great teacher !!!
Thank you, great video
Hello from Greece and thank you.
Good explaining.
I am very late to this party but if you could please consider a couple questions:
1. How would you change the Schotky diode and the electrolytic capacitor to mitigate their overheating? Of course maybe separate the diode and the capacitor but besides that, how would you change them?
2. Is it common to rectify the incoming AC mains power? I thought I noticed in other power supply break downs the rectification occurred on the output side of the transformer.
Thank you for all the time you take producing these very informative RUclipss.
For your 2nd question,
The rectification is done on the transformer output in case of linear power Supply only, wherein the 220v AC is stepped down to lower voltage, then rectified,smoothed and fed to the output.
But in case of SMPS, the AC mains voltage is rectified and smoothed before itself because these high voltage DC has to be switched to very high frequencies for stepping it down. Because SMPS uses special transformer called ferrite transformers and they can't work on very low frequency. These ferrite transformer are small in size and weight than the low frequency iron core transformers. This is the reason why modern power supplies are not very bulky like before. So that's why rectification is done on the primary side.
For the 1st question, you can use a TO package schottky diode like MBR20100 and use it with heat sink and place the capacitor a bit away from diode
@@chandraganeshan961 thank you very much for your excellent reply. I really appreciate you taking the time to answer.
My brain broke about 37 times watching this. You are genius!
Thanks for explaining the operation of the IC startup network (at 15:00) Also thanks for explaining the Passive Clamp (snapper Net at 20:35)
Great! Very helpful!
Excellent video.
So very informative. Nice!!!
what a nice guy heaven bless you sir. you are truly a teacher and a brain giver thank you sir. what a man
would not pass the low voltage directive required for CE making in the EU with that level of isolation in the transformer. the mains winding would also need to be double insulated where it passed near the other windings as it makes its way to the pins. most of these power supplies have reasonable PCB gaps and spacings but let down by a few turns of some coloured tape between windings.
great description of how it works by the way.
@Против Глобалes it's self certification, but when it come to a power supply you have to show compliance to the LVD, low voltage directive, which in turn means that you have to show compliance to EN60950 for IT equipment, or EN61010 for industrial , scientific. I have spent 10's of thousands £ to produce the documentation to prove that the product we sell is safe. if you buy a product from china and then sell it on ebay, you are placing that product on thee market in the EU. if it kills somebody I hope you have a large house to sell to pay off the fines. third party testing is done so that your product liability insurance will pay up. UL, TUV, and a few more to boot make a lot of money out of CE third party testing.
just try to self-cert a medical device! that comes under CE marking.
sorry that's it a bit long but I spent 3 years bringing CE marked equipment up to date with the directives and as I said maybe spent £500000, if we felt we could just put the mark on, then we wasted 1/2 million pounds.
Excellent Info...Greetings from India.
Nicely explained.
sehr gute erklärung!
Very good tutorial.
awesome! Thank you!
Well explained mate. The best I’ve read or heard. Where was your training? Me, i was RAEME Military. But your explanation was A1 and I loved it. Thanks.👍👌😊🤓
very well explained
You are the best . Thanks
"Now just for fun let's install it in an enclosure" HAHAHAHHA! Made my day! Thank you! You make me laugh but I also learn a lot from you even though I would say I already know a few things. I did not know about how higher temperatures could lead to electrolytic capacitors failing sooner.
Amazing video
Thank you. Try connect resistor and capacitor to SR510 for snubber circuit. (may be lower heating)
really good video, thanks :)
Great video
I really enjoy your videos. Clearly you know quite a lot about SMPS. What about a video on how to design one?
So all in all it would have been a good unit only for the mistake with the diode and cap been next to each other.. (and the isolation)
Love the way you go over everything in the schematic 👏👍 no one eles dose that....
Danyk, u are the best in your videos man!
Kasyan tv is 2nd after u!
I learned much from chip capacitor. Thanks
Great video thank you! Challenge for next time: buy two and create a better version using the parts of the second one, a custom PCB and replace the parts you think should be replaced with better parts and isolation.
"It's just way too hot too touch"
*Continues to touch it*
A more educational version of elecroboom