Li-Ion Charger + How does a Switching Power Supply work
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- Опубликовано: 28 авг 2024
- 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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Two transistor luxury modeeeellll I love this guy
Hi Steve!
@@lightbulbgonewild3205 hi mate👍😁
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 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.
You are right. It's quite confusing. An open circuit equals to a closed valve or door.
You are very correct!
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!
The word "dodgy" is my favourite word too!
We need to invent LON to produce that BATTEY.
Good video.
We're too lazy to invent LON.
تحياتي لك وأشكرك وأقدر مجهودك ، تحياتي لك من تركيا .
You're talented.thanks for teaching us.i love your channel.wish you a good luck👍👍👍
You have lovely handwrite.
Cheers from Indonesia
3:40 hot chip lol!!
Appreciate the efforts put in your videos!!
Great explanation and excellent video as always! Thanks DiodeGoneWild for hard examination and explanation. :)
Great work man keep up i love your explanations
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
I really like your videos, they are entertaining and informative.Thank You!
Mind blowing explanation man .....grate work
Best video thenks...
Thanks for the explanation
Li-Lon?? New chemistry? :)
Maybe :o
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.
It's all the fault of Microsoft and the Arial font ;-)
There is no such material like "Lon".
Thanks
Very nice explained 👌👏👏👏👏👏
Really appreciate your videos.
Cheers
Hi, good job.I assemble this circuit, thanks.
but 13001 transistor be hot.what reason my be?
This charger has feedback when inserting a battery, I believe it needs a Schottky Diode with the band facing the battery.
That cracked solder joint at 3:53
You can activate the video subtitles on your channel? Thank you so much
That's great, I like it, I'll try to make one
3:39 hot chip lol
look up a company called potato chips tat makes I.c.s
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
Hi, i am a beginner in smps. Please make a video to make an own designed smps. Add how to calculate them. Thanks
@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.
i really like this stuff
You still can't invert polarity between the two batteries :)
Great job.
Till date I could not understand how the feedback circuit of main transistor works. Can u explain in detail.
nice video
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
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?
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.
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
thank you sir.
At 6:09 what way is this capacitor charging through this diode ?
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...
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 :).
help! I own the same. the led lights up green when I insert the batteries without plugging the charger
What is the output voltage
one tiyo tiye hehehhe
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.
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.
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.
Thanks.
please make a mini inverter in your videos
Why is isolation between sides important?
Why is human life important?
@@DiodeGoneWild What happens if the two sides before and after transformer are close?
its a shock proof ??? pls reply
To upozornenie proti prepólovaniu je tam asi kvôli tomu, aby obidva články boli pripojené v tej istej polarite...
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.
The shorrt thru two tranzistors kill these charger.
Nice!
What is druchee ?
Nice
Cool !!
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
You're Sherlock Holmes :).
But even some branded chargers have no optocoupler. I plan to open the transformer anyway :). I can buy another charger.
it says "FORBID to invert" so it may have wandet to say "it's ok if you turn around the battery"
I hope you're not testing a stun baton on yourself? Maybe you need a frog leg from a gourmet importer or something.
Someone have the english datasheet version for ht3582 IC !? .. Regards..
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
Close=Open and Open=Close??
BWAHAHHAAHHA LI-LON. DUDE YOU MAKING IT SO FUNNY WITH YOUR ACCENT. TAKE MY MONEY!
3:29 "Certified"
Too bad you didn't check its efficiency, I would really like to know it.
luxury model .... lol
Hot chip :D
Hi
Hhhhh. I like your accent
You are flag 🚩 👍👍👍👍👍
I thought you mispelled Battery then I saw the product. (facepalm)
It's a typo.
You can't keep your money ha xd
What is lithium Lon??? .....a new chemistry?????? It's ion bro not Lon
@ 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
@@cenchloraadums3143 thanks for explanation......stay blessed...I love your work.
first ...
Are you indian your speaking accent same as indian
i BET HE'S INDIAN! I LOVE HIS ACCENT. HE SEEMS LIKE SINGING ALL TIME. LOLZ.
Are you kidding me indians dont sound like this, he is not an indian Iam sure he is likely to be from scandanevian.
Knight Rider Bwahahahahhaahha Scandinavian bwahahahahahhhahhah. You made my day dude. Lets bet with bitcoin man that hes an indian
vaibhav you'll got it wrong, he's Czech. Czech it out
i am an an indian...and m damp sure he is not an indian...
beeep......beep haha
Dodgeyyyyyyyyy............
Li-LOL
LiLon battey charger. Lol
They often confuse i with L because lowercase L looks like uppercase i :).
😁😀 Chinese 🤦
your videos are good and educating, but cant you talk normally ? your tone sounds so strange
yusufpam ha ha, i also notice that...
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