Li-Ion Charger + How does a Switching Power Supply work
Ғылым және технология
I'm opening an 18650 Li-Ion cell charger and reverse engineering its schematic. Then I'm explaining how does a switching power supply work. This time it's a simple 2-transistor switch mode power supply (SMPS) without an optocoupler.
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Пікірлер: 117
Excellent explanation of the parts and circuit. You have really a good understanding.
The forbids to invert I'm sure is because of the contacts. Thank you for your content, I really appreciate your knowledge, sense of humor, and cat.
Great explanation and excellent video as always! Thanks DiodeGoneWild for hard examination and explanation. :)
I really like your videos, they are entertaining and informative.Thank You!
Appreciate the efforts put in your videos!!
Two transistor luxury modeeeellll I love this guy
@lightbulbgonewild3205
3 жыл бұрын
Hi Steve!
@T2D.SteveArcs
3 жыл бұрын
@@lightbulbgonewild3205 hi mate👍😁
Great work man keep up i love your explanations
Mind blowing explanation man .....grate work
You're talented.thanks for teaching us.i love your channel.wish you a good luck👍👍👍
hi sir my mobile charger adapter 5Volt 2.1apms , after 4 months charging very slow it's take around 1%to100% 3hours for complete n also changed USB cable i think amps reduced hav u any idea to fix
You have lovely handwrite. Cheers from Indonesia
@DiodeGoneWild I have a question about those 4.7nF, 300Ohm and 4.7uF. How does one match those values to the input 50-60Hz? Say, input is 30Hz halved, how should those values change? I hope you can explain the timings. Thnx.
The word "dodgy" is my favourite word too!
Really appreciate your videos. Cheers
help! I own the same. the led lights up green when I insert the batteries without plugging the charger
Very nice explained 👌👏👏👏👏👏
You can activate the video subtitles on your channel? Thank you so much
Hi, good job.I assemble this circuit, thanks. but 13001 transistor be hot.what reason my be?
Thanks for the explanation
That's great, I like it, I'll try to make one
At 6:09 what way is this capacitor charging through this diode ?
Till date I could not understand how the feedback circuit of main transistor works. Can u explain in detail.
i really like this stuff
5:26 it seem wrong ...... as in drawing the primary winding are wound in same direction as the dot on both winding is in downside ... so according to the back emf voltage in which current direction in the secondary ( aux and secondary ) winding are opposite to the primary ( main ) winding , so ........... if current goes from non dot to dot direction in the primary winding , then current should go from dot to non dot direction in the auxiliary winding mean current should go from base via ossi cap to cathode side of the aux winding as ELECTROLYTE CAP INDICATES ITS POLARITY ? CURRECT ME ? IF I AM WRONG ? IN DETAIL
Someone have the english datasheet version for ht3582 IC !? .. Regards..
Great job.
its a shock proof ??? pls reply
Hi, i am a beginner in smps. Please make a video to make an own designed smps. Add how to calculate them. Thanks
Great video. Just bear in mind, when you are talking about the transistor being OPEN or CLOSED the bilingual people would understand you perfectly, but the native English speakers would interpret that in exact opposite to what you mean. Instead of using open and closed terminology its better to use SWITCHED ON and SWITCHED OFF one. This way it is clear to the native English and does not sound weird to the bilinguals. Keep up the good work.
@DiodeGoneWild
6 жыл бұрын
You are right. It's quite confusing. An open circuit equals to a closed valve or door.
@clementeffiong6881
6 жыл бұрын
You are very correct!
@movax20h
5 жыл бұрын
I was going to complain that using OPEN and CLOSED is fine, but then I watched the video around 5:10. Yeah, he is using OPEN for SWITCHED ON / CONDUCTING, that is not good way of using word OPEN. Open for me means non conductive, just like open switch. Good hint!
We need to invent LON to produce that BATTEY. Good video.
@doriantech9064
4 жыл бұрын
We're too lazy to invent LON.
What is the output voltage
Best video thenks...
تحياتي لك وأشكرك وأقدر مجهودك ، تحياتي لك من تركيا .
3:40 hot chip lol!!
nice video
thank you sir.
That cracked solder joint at 3:53
This charger has feedback when inserting a battery, I believe it needs a Schottky Diode with the band facing the battery.
What is druchee ?
Nice!
這充電挨西最好用不管電極正反都可充(閃靈充也有這挨西)網路搜尋挨西代號就可以得到pdf檔案(資料規格表)
I don't understand the diagram, main switching transistor acts more like a diode in series with 8.2 resistor at full mains potential!! If the transistor endures maybe base biasing transistor will turn off the first cycle, then how will the second cycle starts again? Up to my understanding, that 3.5M resistor be connected to mains positive to start oscillation then it might work, but still no snubber etc...
@DiodeGoneWild
6 жыл бұрын
The transistor doesn't work like a diode. The circuit oscillates because of the positive feedback from the auxiliary winding. The auxiliary winding can supply much more current into the base than the 3.9M resistor, so the resistor has almost no effect after the startup. The current from the feedback winding is what turns the transistor fully on. The auxiliary transistor can turn the main transistor off, but once the main transistor is off, there's no current going through the 8.2 ohm resistor, the auxiliary transistor turns off and the main transistor can turn back on :).
Thanks.
Thanks But,i have a q!! How the main transistor turn off with the cabacitor , I mean,how the cabacitor passing current!!?? Sorry, for my bad english
Thanks
I wonder, i've seen these sub-$50 meggers, VC60B/B+, different branding on silkscreen, Vici, Victor, etc. I know you can't really use them to say whether a transformer is good, because as it sings along, bad things can happen, lacquer can break, mediocre insulation can shift, but are they good enough to tell you whether the transformer is still reasonably isolated right now and not going to shock you right tonight?
Cool !!
please make a mini inverter in your videos
Li-Lon?? New chemistry? :)
@ELECTROHAXZ
6 жыл бұрын
Maybe :o
@DiodeGoneWild
6 жыл бұрын
Maybe :) but it seems that the chinese guys are confused by the fact that lower case "L" looks like upper case "i" and they sometimes use L indstard of i or they use i instead of L.
@MrOpenGL
6 жыл бұрын
It's all the fault of Microsoft and the Arial font ;-)
@doriantech9064
4 жыл бұрын
There is no such material like "Lon".
3:39 hot chip lol
@nsfeliz7825
4 жыл бұрын
look up a company called potato chips tat makes I.c.s
Why is isolation between sides important?
@DiodeGoneWild
Жыл бұрын
Why is human life important?
@gabrielphilips6980
Жыл бұрын
@@DiodeGoneWild What happens if the two sides before and after transformer are close?
Nice
That box is used in many chargers. Back in the day I ordered one from Gearbest. It exploded in my hands However, the safety text applies. If for instance one would carelessly two batteries, one in reverse polarity, it would go south very fast. It is bad design imho
one tiyo tiye hehehhe
BWAHAHHAAHHA LI-LON. DUDE YOU MAKING IT SO FUNNY WITH YOUR ACCENT. TAKE MY MONEY!
Well I prefer parralel charging instead of series, yes if the batteyes are different levels, there will be a current, but in series, one battery will be overcharged or possibly killed.
You still can't invert polarity between the two batteries :)
Battey supply he he :-D, we like ching-lish :-D. That circuit looks similar to the other 18650 charger you showed, but a little better. Shame there is no opto feedback and emi capacitor, ahh well its cheap. Same auto reverse polarity i.c. The two transistor circuit is a bit minimal, but the 12v/5v hard drive caddy supplys are not much better, and they last a decent time.
@SianaGearz
6 жыл бұрын
Why would it need opto feedback? A little bit of voltage sag with current might even help the HotChip run less hot! Keeping in mind HotChip is a specialised linear regulator.
@DiodeGoneWild
6 жыл бұрын
The 2-transistor power supply topology is actually not bad at all. A lot of TV's and CRT monitors used this. It works really well. It only needs a to add bridge rectifier, fuse, inrush resistor or NTC, EMI filter, snubber and so. No other transistor or chip is necessary.
Hot chip :D
To upozornenie proti prepólovaniu je tam asi kvôli tomu, aby obidva články boli pripojené v tej istej polarite...
@DiodeGoneWild
6 жыл бұрын
To je dobrý vysvětlení. Sice to má automatickou polaritu, ale právě protože jsou obě baterie paralelně, nesměj se tam dát náhodně. Akorát je divný, že ta výchozí polarita je opačně. Ono jí to sice detekuje a otočí, ale kdyby se tam dal článek vybitej skoro na nulu, tak ho to bude nabíjet opačně.
I hope you're not testing a stun baton on yourself? Maybe you need a frog leg from a gourmet importer or something.
it says "FORBID to invert" so it may have wandet to say "it's ok if you turn around the battery"
no core disassembly and turns count? That tells me you liked it and didnt want to destroy it:). By the way this auxiliary feedback winding which is proportional to the secondary is the evolution the chinese made to the switching flybacks...In order not to use an optocoupler and secondary tl431 or zener and reduce cost...By a simulation i had made on LTspice i say that it also lowers primary voltage spikes and ringing on T(off) (voltage spike 450V on self oscillation Vs 550V of regular optocoupled flybacks) of the flyback so reduces the need for a BA159 or other diode snubber or supressor circuit on primary but didnt made a real experiment on oscilloscope though to prove this. :D:D:D:D
@DiodeGoneWild
6 жыл бұрын
You're Sherlock Holmes :). But even some branded chargers have no optocoupler. I plan to open the transformer anyway :). I can buy another charger.
3:29 "Certified"
Close=Open and Open=Close??
beeep......beep haha
It forbids inverting the polarity because when using two batteries at once you have to plug them both in the same polarity or otherwise one will go boooom
The shorrt thru two tranzistors kill these charger.
Too bad you didn't check its efficiency, I would really like to know it.
Hhhhh. I like your accent
first ...
Hi
luxury model .... lol
You are flag 🚩 👍👍👍👍👍
Are you indian your speaking accent same as indian
@tangflx
6 жыл бұрын
i BET HE'S INDIAN! I LOVE HIS ACCENT. HE SEEMS LIKE SINGING ALL TIME. LOLZ.
@mrakjunior
6 жыл бұрын
Are you kidding me indians dont sound like this, he is not an indian Iam sure he is likely to be from scandanevian.
@tangflx
6 жыл бұрын
Knight Rider Bwahahahahhaahha Scandinavian bwahahahahahhhahhah. You made my day dude. Lets bet with bitcoin man that hes an indian
@honda9731
6 жыл бұрын
vaibhav you'll got it wrong, he's Czech. Czech it out
@sabsesaral7054
6 жыл бұрын
i am an an indian...and m damp sure he is not an indian...
You can't keep your money ha xd
Li-LOL
LiLon battey charger. Lol
@DiodeGoneWild
6 жыл бұрын
They often confuse i with L because lowercase L looks like uppercase i :).
I thought you mispelled Battery then I saw the product. (facepalm)
@doriantech9064
4 жыл бұрын
It's a typo.
Dodgeyyyyyyyyy............
😁😀 Chinese 🤦
What is lithium Lon??? .....a new chemistry?????? It's ion bro not Lon
@cenchloraadums3143
3 жыл бұрын
@ 0:14 you can see this (mostly probably Chinese) manufacturer has invented not only a new chemistry, but also a new name for what you charge using this charger...Lol
@candleacademypakistan9974
3 жыл бұрын
@@cenchloraadums3143 thanks for explanation......stay blessed...I love your work.
your videos are good and educating, but cant you talk normally ? your tone sounds so strange
@zarirvtech
6 жыл бұрын
yusufpam ha ha, i also notice that...
@SpeccyMan
6 жыл бұрын
Define normal!
5:26 it seem wrong ...... as in drawing the primary winding are wound in same direction as the dot on both winding is in downside ... so according to the back emf voltage in which current direction in the secondary ( aux and secondary ) winding are opposite to the primary ( main ) winding , so ........... if current goes from non dot to dot direction in the primary winding , then current should go from dot to non dot direction in the auxiliary winding mean current should go from base via ossi cap to cathode side of the aux winding as ELECTROLYTE CAP INDICATES ITS POLARITY ? CURRECT ME ? IF I AM WRONG ? IN DETAIL
5:26 it seem wrong ...... as in drawing the primary winding are wound in same direction as the dot on both winding is in downside ... so according to the back emf voltage in which current direction in the secondary ( aux and secondary ) winding are opposite to the primary ( main ) winding , so ........... if current goes from non dot to dot direction in the primary winding , then current should go from dot to non dot direction in the auxiliary winding mean current should go from base via ossi cap to cathode side of the aux winding as ELECTROLYTE CAP INDICATES ITS POLARITY ? CURRECT ME ? IF I AM WRONG ? IN DETAIL
5:26 it seem wrong ...... as in drawing the primary winding are wound in same direction as the dot on both winding is in downside ... so according to the back emf voltage in which current direction in the secondary ( aux and secondary ) winding are opposite to the primary ( main ) winding , so ........... if current goes from non dot to dot direction in the primary winding , then current should go from dot to non dot direction in the auxiliary winding mean current should go from base via ossi cap to cathode side of the aux winding as ELECTROLYTE CAP INDICATES ITS POLARITY ? CURRECT ME ? IF I AM WRONG ? IN DETAIL