5V 2A SMPS - test, teardown, schematic, explanation, improvements

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5V 2A SMPS - test, teardown, schematic, explanation, improvements

Рет қаралды 129,516

Күн бұрын

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.
You can support me on Patreon:
/ diodegonewild
My Instagram:
/ savage_danyk

Пікірлер: 375

@gordonwedman3179 5 жыл бұрын

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.

@mamun088 5 жыл бұрын

It was more educational than my 4 years of engineering degree. Thank you. :)

@mehdirezai5347 3 жыл бұрын

True

@gamiwv 3 жыл бұрын

It would be a blessing to have him as a teacher when I was (many-many years ago) student

@BillAnt 5 жыл бұрын

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 :D Probably the Chinese manufacturers are coping it straight from his diagrams (which in turn was originally made in China).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

@catalinbadalan4463 3 жыл бұрын

@Jad Warren You were right!!!! Nobody gives a shit.

@nin1ten1do 2 жыл бұрын

ya and delivery him that back.. to have some more content is endless loop-.-

@pierre7127 Жыл бұрын

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.

@keen2461 4 жыл бұрын

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.

@MrMaxeemum 5 жыл бұрын

Superb explanation as always. Thank you for going in depth yet again.

@adithyapillai4259 5 жыл бұрын

Hands down the best explanation of a Switch Mode Power Supply. Thank you Buddy 😄

@kapegede 5 жыл бұрын

A video is never too long as long as it is entertaining. Thanks for your explanations!

@Akash.Singh4 5 жыл бұрын

36:09 , love your pwm technique.😂

@Amanullah-dx5uy 4 жыл бұрын

😂

@Debraj1978 3 жыл бұрын

Its WHM (With hand modulation).

@atmanandmaya2090 Ай бұрын

@@Debraj1978, specifically say HOMCPWM (Hand Operated Mind Controlled Pulse Width Modulation)

@a.lisnenko 5 жыл бұрын

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.

@annyan904 5 жыл бұрын

Best explanation of power supply circuit till now.....hats off....just simply love your work

@atexnik 9 ай бұрын

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!

@coldfinger459sub0 5 жыл бұрын

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.

@keithking1985 5 жыл бұрын

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

@robertthompson5908 3 жыл бұрын

Do it! It’s challenging but fun. These videos are really helpful.

@jsrada29 5 жыл бұрын

You are the BEST!! Thank you for this explication

@youcanlearnanything8564 4 жыл бұрын

I watch a lot of EE videos online, but nobody explains this as well as you do. Keep up the good work!

@princebanini 4 жыл бұрын

Really impressive. I love your tear downs. probably one of the best on youtube

@bertholtappels1081 5 жыл бұрын

“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.

@Vilvaran 5 жыл бұрын

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...

@bertholtappels1081 5 жыл бұрын

Oh-ooo... rabbit hole. Thanks! And thanks to google translate, too. Now my evening is done for 😁

@Miata822 5 жыл бұрын

This was a wonderfully detailed video. I am constantly learning more from your videos.

@1pcfred 5 жыл бұрын

Great depth of explanation.

@williamschmidt-hansen6311 5 жыл бұрын

I really enjoyed this video and learned a couple of things along the way. Thanks for creating such good content!

@allexandruprroca6713 5 жыл бұрын

Man , you need a temperature tester. :)>)))

@funkolog 5 жыл бұрын

that would be boring. its more Mc Gyver like with those wet wipes

@romanhanajik3185 5 жыл бұрын

@@funkolog my stomach hurts if i see finger over these rabish isolations/devices.

@Akash.Singh4 5 жыл бұрын

I think you should have to gift him.

@sarezer 5 жыл бұрын

You don't need it when your finger can measure temperatures like "hot" and "super hot".

@starrlucky6549 5 жыл бұрын

Someone from techno companies totally should donate one of infrared thermal cameras already. We have 120k subscribers, what the heck?

@zesbijzes2 5 жыл бұрын

This is a perfect reverse engineering example. Fenomenale explanation. Thanks, I learned alom!

@zesbijzes2 5 жыл бұрын

A lot, of course...

@Doveroman 3 жыл бұрын

Perfektne a zrozumitelne vysvetlene, velka vdaka. Konecne som nasiel co som hladal.

@xicath 3 жыл бұрын

really expert professional but simple explanations, easy to follow for amateurs like me

@DrHouse-zs9eb 5 жыл бұрын

Love your long Videos! Great explenation, your knowledge is astonishing!

@garypoplin4599 Жыл бұрын

Well done! I learn much from these videos that show schematics with accompanying explanation.

@Bambinz92 5 жыл бұрын

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!!

@ramamurthynatesan3368 4 жыл бұрын

one of the best you tube video on smps.very painstakingly done. please keep it up

@mohalothman99 5 жыл бұрын

Could someone donate him a proper thermal camera please? Cause he freak me out every time he touch a smps components with bare hand!

@vegtersbaas 5 жыл бұрын

Power supplies are complex beasts. Thanx for helping me about the purpose of different components.

@arpadprp1778 11 ай бұрын

Man, you are fantastic expert, presenting very well.

@mysock351C 5 жыл бұрын

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.

@mysock351C 5 жыл бұрын

Missed the part of him soldering to it, but YT doesn't allow me to edit because Im too non-PC.

@alphonsesynrem28 4 жыл бұрын

Awesome!!!! Your explanation is like Stroking a Cat, patiently and gently for quite a long time. very very nice .

@Wraithan 4 жыл бұрын

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.

@puriap250 2 жыл бұрын

Excellent video. Thank you very much for going in such detail and explaining things so well.

@rougeleroux6803 Жыл бұрын

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!

@Krunalbhongade 5 жыл бұрын

The best video on smps I have ever seen. Thanks a lot 😀

@guttenflax 3 жыл бұрын

thanks. I've never watched a video explaining so well the feedback circuit of a psu.

@omart.n.2752 5 жыл бұрын

very great work as usual, lot of new information for a good design, thanks.

@edgeeffect 4 жыл бұрын

I love your stuff that you made years ago..... it reminds me of my own childhood.

@brucel.6078 3 жыл бұрын

My brain broke about 37 times watching this. You are genius!

@phonicwheel933 4 жыл бұрын

Brilliant explanation DGW.

@atalakeanumonarshi129 5 жыл бұрын

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!

@vpertys 5 жыл бұрын

do you live in indonesia?

@BillAnt 5 жыл бұрын

I've tried watching ElectroBoom, but that dude is outright crazy... too much yelling and acting, not my cup of tea. lol

@0Gviii08 4 жыл бұрын

Man your utube Channel is great!! I enjoy watching your teardowns and schem, greetings from México

@user-gp8il5hj4x 7 ай бұрын

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

@TheCarlos206 5 жыл бұрын

Beautiful explanation man!--Thanks

@danielugwa6517 2 жыл бұрын

what a nice guy heaven bless you sir. you are truly a teacher and a brain giver thank you sir. what a man

@pirataga 5 жыл бұрын

You're awesome, Diode!

3 жыл бұрын

That diode at 6:56 has gone wild! :) Great explanation, thank you!

@smartech62 4 жыл бұрын

thank you love the way you talk , and ex plane slowly , I just repaired a switch mod supply with the help of your video.

@carlossartori1818 5 жыл бұрын

Great post, keep up your quality videos that are true special lessons!

@TheEmbeddedHobbyist 5 жыл бұрын

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.

@TheEmbeddedHobbyist 5 жыл бұрын

@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.

@czartraktheprotogen 5 жыл бұрын

"It's just way too hot too touch" *Continues to touch it*

@michaeld9682 3 жыл бұрын

A more educational version of elecroboom

@brucel.6078 5 жыл бұрын

Outstanding video!!!!! Thanks!!!!

@thogreen 4 жыл бұрын

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)

@electronic7979 5 жыл бұрын

Helpful video 👍

@gamiwv 3 жыл бұрын

Scissors are a very misunderstood tool Excellent presentation and analysis (speaking as hardware engineer myself)

@keithking1985 5 жыл бұрын

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....

@hernancoronel 5 жыл бұрын

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.

@Basement-Science 5 жыл бұрын

Those 1kV rated capacitors in place of the class-y capacitor are *Completely Unacceptable.* I have actually had one of those fail short-circuit in a similar power supply. It passed enough current to blow up the fuse and a 16A circuit breaker. I was lucky that I touched the output with something grounded and not my hand.

@romanhanajik3185 5 жыл бұрын

what is the standart voltage for these power supplays in EU and USA? I found "Class X and Y capacitors are also given a number to represent their impulse test rating. The most common are X1 (tested to 4,000 volts), X2 (2,500 volts), Y1 (8,000 volts) and Y2 (5,000 volts)."

@Basement-Science 5 жыл бұрын

@@romanhanajik3185 Most class-X rated capacitors are rated for 275Vac I believe, although higher rated capcitors can still be class-X. Class X mainly means that it will always fail in _short circuit._ That way it should blow a fuse instead of polluting the grid with interference. Class-y caps are usually rated for various higher voltages. Apparently Y1 have to be rated for at least 500Vac, but Y2 and worse can be rated lower than that. Most importantly, they absolutely have to fail open-circuit to avoid the possibility of electric shock.

@valdisblack1541 4 жыл бұрын

hah, not only you have one in short... this whole thing looks like a chinese suicide lottery

@valdisblack1541 4 жыл бұрын

@Liam yep)))

@gordonrobertson102 5 жыл бұрын

Great video. I love your diy electronic load, I built something similar for testing power supplies.

@umutk5614 5 жыл бұрын

Very nice video as usual, i didn't understand all but with every video i understand more with your good explanation. Thank you 🙂

@lez7875 5 жыл бұрын

greetings from Brazil to all. 0:32 what ??? where is the assistant cat ??? ``fired´´??? very good. success.

@ziongite 3 жыл бұрын

I like a board where it's all on top and where there is decent spacing between components, makes it more easy to repair.

@drprofesszor 5 жыл бұрын

36:08 this PWM frequency is very low ;) and no EMI filter between "you" and mains. :D

@domen6005 5 жыл бұрын

"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.

@TomiHakkarainen 5 жыл бұрын

Nice and entertaining as always. thank you for these. looking forward for the next 👌🧐

@fullbridgeelectric 3 жыл бұрын

Danyk, u are the best in your videos man! Kasyan tv is 2nd after u! I learned much from chip capacitor. Thanks

@laszlovona 5 жыл бұрын

f*k, it all seem so self explanatory and straightforward when the schematic is drawn :). But until then... these PSs are some kind of black magic for me haha 😂 Great tuition as always! 👍 (I am EE but less and less involved in hw)

@theoldbigmoose 3 жыл бұрын

haha they are still "black magic"! Try designing the transformer from scratch. Its a skill I want to master...

@phouleng 5 жыл бұрын

Good explaining.

@kalle48 5 жыл бұрын

I love your videos!

@srpatnaik4548 2 жыл бұрын

Excellent Info...Greetings from India.

@makeinheaven 5 жыл бұрын

Youuuu aarreee a great teacher !!!

@nunolourenco1532 5 жыл бұрын

There are now some infrared array cameras (32x24 + interpolation, if I recall it right) on ali. These are based on the mlx90640 or similar and are found around 80-90$.There are some other for smart phones from a company called hti (hti ht-102, if I'm not wrong) but they seem hit and miss (probably depends on the smartphone also), these costed around 120$ last time I've checked. You can also build one yourself with the mlx chip and an esp32 and a screen... the chip is expensive (50-60$) so, all together, it might be close to the 80-90 mark...

@philosborn3748 5 жыл бұрын

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.👍👌😊🤓

@bisratteshome3518 Жыл бұрын

it was best explanation!! specially for starters like me !!

@johnhill3507 3 жыл бұрын

Great video thanks for all your time and work

@Alarichos1191 4 жыл бұрын

Hello from Greece and thank you.

@electroumit 5 жыл бұрын

Thank you. Try connect resistor and capacitor to SR510 for snubber circuit. (may be lower heating)

@Jasfon 5 жыл бұрын

I love this kind of videos , thanks !!!

@utpalrathod415 5 жыл бұрын

Can u please explain how to calculate snubber circuit resistor and capacitor value for Smps? I want to make Smps 🙂🤔

@keithking1985 5 жыл бұрын

That's a good question

@Gengh13 5 жыл бұрын

I would love to see a video of this with a couple of scope shots with different snubbers.

@Donphan1 5 жыл бұрын

Watch this (from 12:00): kzfaq.info/get/bejne/osd4gZeJ05udnH0.html I tried this method in simulation and it worked nice

@DirtySanch3z 4 жыл бұрын

love your channel, this is gold.

@jp040759 5 жыл бұрын

Excelent job as always. Thank you.

@jawadaboucha8266 5 жыл бұрын

Great explanation! Nice work.

@alichank 3 жыл бұрын

I would love if i could get this load tester. Can you send it please?

@bennaambo2716 4 ай бұрын

Haha so epic just randomly saying “and here is my dog which is scared of thunder” 😂😂😂

@ch2o2 5 жыл бұрын

..always almost breaks my heart when you back-engineer transformers because afterwards the (nice) module can't be made running any longer (unless you wind it again, what I don't think). The information of how many terms of wire-winding and isolation-windings aren't necessary for understanding the circuit ...but I know, you always want to do it more than perfectly ...love your videos (and your genius style of measuring temperatures :D ) ...brilliant

@superdau 5 жыл бұрын

These videos are more instructive than about keeping the items alive. Although the circuit is almost textbook and better than most cheap power supplies, the implementation had a few flaws already anyway. So not too much is lost by tearing everything apart.

@ch2o2 5 жыл бұрын

my little objection was only to the transformer ..what's the point of knowing how many terns? Can one draw any conclusions from this, I don't think so (well, apart from the plus of information about the goodness of the isolation)

@theoldbigmoose 3 жыл бұрын

Great teardown. Would be good to add discussion and measurement of the air gap on the transformer. That is critical to this supplies operation

@xseba950x8 5 жыл бұрын

I love your videos, im waiting for more ;)

@alec4672 3 жыл бұрын

Your accent mixed with your fluent English sounds really cool 🤙😋

@uK8cvPAq 5 жыл бұрын

You think upping the switching frequency would of helped or was that transformer just not very good?

@hqiu6828 4 жыл бұрын

What kind of MOSFET and Potentiometer are used in the test load?

@livancalcedo4626 5 жыл бұрын

Excellent analysis!!

@osamahisham4397 5 жыл бұрын

Most important for me how to find the failure!!😁

@SoftBreadSoft 5 жыл бұрын

Manual pulse-width modulation. Human intermittent pulse module.

@strange67x 10 ай бұрын

oh my god, so crazy, but so cool. Thanks for the video ! 🙂

@saadaldossri5348 5 жыл бұрын

Thanks, could you rewind the transformer with new a good wire? And it is good if the out voltage is 24v with 2A.

@bertholtappels1081 5 жыл бұрын

I was thinking the same. It would be a perfect supply after that.

@SamSpiri 5 жыл бұрын

Yes! This will be very satisfying to watch you make a perfect usb charger

@saadaldossri5348 5 жыл бұрын

@Liam 50 watts is sufficient.

@saadaldossri5348 5 жыл бұрын

@Liam We want get only the knowledge, If it is difficult then forget it.

@saschakolb7102 4 жыл бұрын

This characteristics of overload is named hicks mode, I think. For charging my 280 Ampere hours Lithium battery in my mobile home I searched for overload characteristics which continuous power mode. I found a 70 Amps Meanwell power supply which 100-230V > 12 to 15 Volt adjustable with 70 or 75 Ampere max and I calibrated it to 0,45 Volts below the maximum allowed for my battery (14.6V). The "last % does a solar charger with its specific LiFePo Characteristic. And of course I use a self made emergency stop if Voltage Parameters are going out of specifications of my 280Amphrs rechargeable LiFeMgO Battery. It works very well.

@younesthabet 4 жыл бұрын

what's the power dissipation when it's not connected to a load? and what was the diode you put instead of the SR5100? can i get the part reference for the transformer?what's the capacity of X2 cap you put for DMI suppression?