Building a better buck regulator, capacitor ESR / ESL, parallel resistors maths

  Рет қаралды 48,193

DiodeGoneWild

DiodeGoneWild

5 жыл бұрын

Let's design a buck regulator a bit better than the Chinese makers do (including schematic). Let's also talk about calculations of resistors in parallel and about the problem of a high impedance (ESR, ESL) of electrolytic capacitors.
The previous video about the charger:
• Questionable 2-in-1 US...
You can support me on Patreon:
/ diodegonewild

Пікірлер: 183
@teddysoft
@teddysoft 5 жыл бұрын
You are one of a kind when it comes to these instructions videos! Great works, and really you pinpoint the schematics well 💪
@FaysalKhalashi
@FaysalKhalashi 5 жыл бұрын
Choosing right capacitor was very complicated to me.. now you just taught me everything important.. Thank you DiodeGoneWild.. 👍👍
@BillAnt
@BillAnt 5 жыл бұрын
Now if DiodeGoneWild could give us a lesson about the different diodes. ;D
@boonedockjourneyman7979
@boonedockjourneyman7979 5 жыл бұрын
You have hit a strong method. You’re going from passive to active teaching. Like the difference between lecture and lab work. Bravo. You have a winner for your deep skill level.
@coldfinger459sub0
@coldfinger459sub0 5 жыл бұрын
Thank you for the capacitor lesson and where when and why different capacitors are better for different purpose
@edgeeffect
@edgeeffect 4 жыл бұрын
You hear that such a type is good for such an application... I always think "ok... but why?".... well Mr Gone-Wilde explains a few of my "whys" here.... he's a champ!
@coloradowilderness3139
@coloradowilderness3139 5 жыл бұрын
If i get a teacher like you in my Childhood when i had lot of Questions ! Now i get the answers . Thanks
@BillAnt
@BillAnt 5 жыл бұрын
Fire away, he does answer intelligent questions.... like: At the +5 volts output the buck regulator is connected through a single 1N5819 diode. Is that all that stand against a reverse voltage being fed back into the 12v regulator from the mains side?? what would happen if somehow you were able to plug it into both mains and the 12V supply? I'm guessing the voltage would stay at 5V but the amperage would increase.
@pirataga
@pirataga 5 жыл бұрын
I love your videos, I always learn a lot from them!!
@brucel.6078
@brucel.6078 5 жыл бұрын
Outstanding video!!!!! Thank you sir.
@khalkhal2372
@khalkhal2372 5 жыл бұрын
Always a pleasure to to watch your videos
@aivansama6265
@aivansama6265 5 жыл бұрын
Enterntaining and informative videos, keep up the good work!
@oddjobbob8742
@oddjobbob8742 2 жыл бұрын
I learn so much from your KZfaqs. Thank you for the time you take to share your knowledge and experience.
@mikeoliver3254
@mikeoliver3254 5 жыл бұрын
This was a fantastic instructional video. I have a couple of questions about putting together a filter board to clean up ripple from my cheap 30v 10A bench power supply but I’ll ask them over on Patreon.
@gabrielmadrid8698
@gabrielmadrid8698 5 жыл бұрын
Good job man! And thanks to the person how donate you that ESR meter!
@nagorncaraba4310
@nagorncaraba4310 5 жыл бұрын
was well given. he deserve. he knows a lot and he like to share the knowleadge.
@dl8cy
@dl8cy 5 жыл бұрын
As always from that Czech guy a awesome educating end entertaining video - 1000 Tnx !
@laptopdisassembly9886
@laptopdisassembly9886 5 жыл бұрын
I specially like the latest videos, with lots of new teaching and good info !
@s40s06
@s40s06 4 жыл бұрын
Very nicely explained and pin pointed at every important thing.
@ChusenOne
@ChusenOne 5 жыл бұрын
Really good video as always and right on time! I've been trying to repair a psu with a fet as a switching regulator and seems the capacitors around it are not rated for the task, it makes a clicking noise and no voltage at the output. Thanks a lot!
@rashton5730
@rashton5730 5 жыл бұрын
Excellent video DGW! I pick up beautiful dead flat screen tv's here or there or when I install new ones for friends...... most of the time it is bad capacitors, the pain in my ass is finding replacement capacitors....... they have to be low esr, if you read the forums you have noticed people saying they opened their tv's and found the bad caps, gotten excited and ordered new ones only to be told they are not low esr....... My request is for you to make a video on data sheets so we can order the right capacitors. Love your Channel
@MrMaxeemum
@MrMaxeemum 5 жыл бұрын
Extremely clear explanations and follow through.
@Kyleroo
@Kyleroo 5 жыл бұрын
I've been waiting for an another video. Ah. Thanks.
@umutk5614
@umutk5614 5 жыл бұрын
Great video, thanks DiodeGoneWild
@128Wojtek
@128Wojtek 5 жыл бұрын
Thanks for your films :). You can also check ESR using special tester, which can check transistors, diodes, mosfet etc.
@1pcfred
@1pcfred 5 жыл бұрын
Discharge capacitors before you hook them to your fancy ESR meter. Some really fancy meters do it for you. Yours might not be quite that fancy though.
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
The ESR meter contains 2 antiparallel Schottky diodes at the input.
@1pcfred
@1pcfred 5 жыл бұрын
@@DiodeGoneWild good deal. My testers I have to discharge the device under test first. I know some nice meters have a sensor and a relay in them to discharge devices before testing them.
@edgeeffect
@edgeeffect 4 жыл бұрын
It is designated as an "in circuit" meter... ... ... isn't it? That should be good for working on charged-up caps???
@1pcfred
@1pcfred 4 жыл бұрын
@@edgeeffect some meters can handle charges, some cannot. Personally I do not see any reason to try to measure a charged device. I am only interested in the value of the component.
@AbhishekTiwari-zb6jl
@AbhishekTiwari-zb6jl 4 жыл бұрын
Amazing informative video.thanks man
@annyan904
@annyan904 5 жыл бұрын
superb....very informative video
@johannes5000
@johannes5000 3 жыл бұрын
Fantastic video!
@anindyamitra5091
@anindyamitra5091 5 жыл бұрын
In case of series-parallel combination of inductors, for applying the same formula as that of resistors, you must have to make sure that the inductors are not magnetically coupled to each other in anyways. Otherwise, formula might give unexpected results. For example, in case of two oppositely coupled(coupling coefficient=1) inductors having same inductances(say L), the net inductance in their parallel combination would be zero, instead of L/2(according to the parallel formula).
@celtichongy
@celtichongy 5 жыл бұрын
Excellent and very entertaining.
@sergeaudenaert
@sergeaudenaert 5 жыл бұрын
Great material - practical and to the point :-)
@techbears670
@techbears670 Жыл бұрын
Cat says so complicated mathematics here every this is goes out of my mind
@dosgos
@dosgos 5 жыл бұрын
Awesome follow up! This format is just a superb teaching tool. Probably takes forever to make but these are my favourite style. What kind of cat do you have?
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
Thanks :). Yes, the videos take a lot of time to make. It's a British cat.
@electronic7979
@electronic7979 5 жыл бұрын
Useful video 👍
@frmol1
@frmol1 3 жыл бұрын
super intresting video!
@scratchdog2216
@scratchdog2216 5 жыл бұрын
Well presented lesson. I mess around with HF RF circuits. Different animal yes, but much still applies. Thanx.
@FindLiberty
@FindLiberty 5 жыл бұрын
Great job!
@richardnanis
@richardnanis 5 жыл бұрын
Great video like always! Can we hope you will do a SMPS (computer PS) modification to adjustable output some time?
@datswissguy5387
@datswissguy5387 5 жыл бұрын
CatGoneWild ;) Awesome videos, thanks a lot!
@theworldaccordingtome6448
@theworldaccordingtome6448 5 жыл бұрын
Really good video, thank you!
@lmwlmw4468
@lmwlmw4468 3 жыл бұрын
Great video.
@bamsuth9650
@bamsuth9650 5 жыл бұрын
Love your ideas and repairs very good explanation your voice sound like sonata
@mikeoliver3254
@mikeoliver3254 5 жыл бұрын
His accent does sound rather poetic.
@I967
@I967 2 жыл бұрын
Could you perhaps do a separate video about your 555 timer-based DIY ESR indicator? Looks like an interesting construction.
@alonsozenteno5622
@alonsozenteno5622 5 жыл бұрын
Mil gracias por compartirlo...un saludo desde Chiapas Mexico...soy fiel seguidor de su hermoso trabajo..
@sortofsmarter
@sortofsmarter 5 жыл бұрын
I love how you took your time to "make it better" , could be a new series for you... Do you think the original manufacture failed to do so due to cost or lack of understanding of the way it worked. It doesn't seem like cost would be much of a factor to make it better
@retrohipster994
@retrohipster994 5 жыл бұрын
I would say that is most likely a cost-saving measure. Good electrolytics from a company like Rubicon for instance will cost around five times more than the ones that they used in there. You get a lot of things like this that I've been made based off of schematics in data sheets, but the person making them or company making them just uses the cheapest stuff they can inside. ^^;
@edgeeffect
@edgeeffect 4 жыл бұрын
That's a really good macro shot where you're holding the resistor and pointing at it with a pen? The focus is really crisp!
@electromatic2014
@electromatic2014 5 жыл бұрын
Hi, do you Have a video on how to desing the transformer used for SMPS?, thanks for all your content, I Have learned a lot thanks to you
@Conservator.
@Conservator. 5 жыл бұрын
Thanks again for yet another very interesting video! It’s shows that with only a few components this simple charger can go from horrible to reasonable. Could you perhaps also give an indication of how much this would add to the production costs? It’s a pity how lowest price competition drives the manufacturers of these products to skim on really every component where the can.
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
The tantalum capacitor would add a lot of cost. Those are about 10x more expensive than the electrolytic ones. I'm not sure how much does it cost in big quantities, but 1piece from a trusted supplier may cost about 1.50 USD. The big low impedance electrolytic capacitor would also add a lot of cost.
@Conservator.
@Conservator. 5 жыл бұрын
DiodeGoneWild Thank you, that explains it.
@prathikprashanth2932
@prathikprashanth2932 5 жыл бұрын
nice job!
@williama29
@williama29 5 жыл бұрын
This is fun to learn and I managed to blow at most 2 capacitors once one was in a small radio and one was in a pair of wireless headphones transmitter
@kushantha7
@kushantha7 5 жыл бұрын
Great vid as always. Greetings from sri lanka.
@HaoJieChan
@HaoJieChan 5 жыл бұрын
Love this video! Learnt a lot!
@TheLOD2010
@TheLOD2010 5 жыл бұрын
Verry good electronic basics video. And I realy like your accent. Greetings from eastern Germany
@vijayakarekar
@vijayakarekar 5 жыл бұрын
You are great sir....
@alainthuillier8560
@alainthuillier8560 5 жыл бұрын
Super explication. Merci
@threeMetreJim
@threeMetreJim 5 жыл бұрын
100kHz is at the maximum operation frequency of the device. They tend to work better at about half that, need to recalculate the inductor and check that they even used an appropriate value in the first place; I've seen a few similar supplies that haven't.
@macmroz
@macmroz 2 жыл бұрын
So what is your final charger maximum load parameters at 12V DC and 24V DC? Thanks for your video - it is very useful.
@SachinKumar-rf2bx
@SachinKumar-rf2bx 5 жыл бұрын
Very helpful for me thank you so much
@saarike
@saarike 5 жыл бұрын
Really nice!
@lez7875
@lez7875 5 жыл бұрын
greetings. very well explained. success.
@Themaktech7100
@Themaktech7100 4 жыл бұрын
12:18 Diode gone wild likes cars
@Technicksworkshop
@Technicksworkshop 5 жыл бұрын
Can't you add a transistor at the output of the chip and decrease the resistance of the current sensing resistor to increase the current capability?
@MegaSunRise3
@MegaSunRise3 5 жыл бұрын
Thank you for sharing your knowledge
@thiagogarofalo4253
@thiagogarofalo4253 5 жыл бұрын
Very good
@BalintNandori
@BalintNandori 5 жыл бұрын
I love your accent. All of Your videos are great and helpful . thanks😀( sry for bad english)
@ex-soldier4341
@ex-soldier4341 5 жыл бұрын
Indian english accent.. Charrrgerrr!!
@YoDay
@YoDay 5 жыл бұрын
@@ex-soldier4341 lol wherever . It's so freaking funny when he says bloody hell
@remontlive
@remontlive 5 жыл бұрын
Hello if you want to low ESR you can take two capacitors in parallel and take ceramic in parallel, cuz electrolytic doesn’t work on high frequency
@peterzingler6221
@peterzingler6221 5 жыл бұрын
Jo diodegonewild can you make something about diy shop tools and the dangers of that?
@sudhirhora279
@sudhirhora279 5 жыл бұрын
thx for your help to understand these circuits ... can you help me to increase output current as the circuit heatsup very quickly when smartphones connected...i tried to convert dual transistors circuit (13003,945) smps to operate over 12v but it only gives low amp. o/p
@N0G0MAIL
@N0G0MAIL 4 жыл бұрын
Very nice. That ESR meter measure the impedance of the capacitor at 100KHz. I think it will be better to use 2 frequencies, 100KHz and 50Hz to measure the capacitor impedance.
@emersonmattoz3794
@emersonmattoz3794 5 жыл бұрын
Can i replace 2 ....5 rings resistor on the power supply primary side for 4 ring resistor near the pfc input on primary side..???
@id15807936
@id15807936 5 жыл бұрын
That's why i have added small ceramic capacitor in parralel to a bigger electrolytic capacitor in my LC filter circuit for a MOSFET driver, apparently that makes sense. But i'm not sure if the higher ESR of cheap electolytic capacitors affects that much on lower frequencies. My circuit uses 13.33kHz PWM and without LC filter the MOSFET driver affects a lot on the microcontroller which makes the PWM signal. So do i need to add a ceramic capacitor on frequencies as low as 10-20kHz ?
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
I think that you need a ceramic capacitor at any frequency, it works with a square wave (switching circuitry). In switching circuits, it's not about the frequency, it's about the things that happen during the transistor transition from on to off and back. All that ringings, overshoots, ....
@id15807936
@id15807936 5 жыл бұрын
@@DiodeGoneWild Oh yeah, i forgot about ringing etc. Thank you for the answer.
5 жыл бұрын
My friend...! Been waiting for you making a modification for atx power supply using SG6105D IC to 14 volts. I have it schematic here. Or Can you tell me where to change the components?
@BillAnt
@BillAnt 5 жыл бұрын
At the +5 volts output the buck regulator is connected through a single 1N5819 diode. Is that all that stand against a reverse voltage being fed back into the 12v regulator from the mains side?? what would happen if somehow you were able to plug it into both mains and the 12V supply? I'm guessing the voltage would stay at 5V but the amperage would increase.
@BillAnt
@BillAnt 5 жыл бұрын
Got ya, so the outcome is dependent on the load amount and they just help each other out (in case it need be).
@rene-jeanmercier6517
@rene-jeanmercier6517 5 жыл бұрын
You are a great teacher! Can you show how to connect a Power Mosfet at the output to increase current capability of the circuit? Thank you again so much for your great tutorial. Like Ted said "You are one of a kind"! RJM
@vnagaravi
@vnagaravi 5 жыл бұрын
Some one help me My phone getting some AC current while charging. How to fix this some one told me to removing capacitor between primary and secondary on board
@MalagasOnFire
@MalagasOnFire 5 жыл бұрын
I've used the schematic of you're DIY ESR meter to build one that allows to plug a DMM with uA scale by tuning R1 and R2 and works pretty nice. Not the best accuracy but it matches the reading of a 1uF cap on a LCR T4 meter :D .
@odpadleak
@odpadleak 5 жыл бұрын
Beautiful cat btw :D
@Astri.electronics
@Astri.electronics 5 жыл бұрын
How did that electrolytic cap didn't blow up if the meter charges it with AC? i thought that polarized caps would blow up
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
It uses a very low voltage for the measurement. This doesn't damage the capacitor. It's well below the voltage drop of diodes and other semiconductors, so you can also measure the capacitors in the board. In most cases, the measurement is not affected by the other components connected to it.
@MrMaxeemum
@MrMaxeemum 5 жыл бұрын
Excellent investigation. I still love your singing voice. Very informative videos. Thanks.
@opposites-369
@opposites-369 2 жыл бұрын
Can you modify Analog Multimeter upgrade to merge with ESR Meter + LSR Meter module? 👍🏻
@zx8401ztv
@zx8401ztv 5 жыл бұрын
We all make mistakes, the blue body multiband resistors often get confusing and hard to read because of the blue background and fading eyes. Using gold or silver for different things than tolerance trip me up. Thankfully there is always a multimeter near :-D. I've used the reciprocal resistor calc with minus instead of plus, for a reversal.
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
Sometimes if I don't take a close look, the silver and gold looks the same. Both is just shiny the same way, especially in dim light or warm white light.
@zx8401ztv
@zx8401ztv 5 жыл бұрын
Daylight gives the best colour as its full of frequencys, unlike man made light that has parts of the spectrum missing. Old 4-5 band resistors when run close to there limits darken, so every colour gets muddy and really hard to read. Who decided that a blue body resistor was a good idea :-(
@tinkmarshino
@tinkmarshino 5 жыл бұрын
you know the neighborhood mice have gone together and paid your cat to get in your way doing these videos? I am just a 67 year old fart who is trying to tech himself electronics.. your site is way over my head but there is something in the way you teach it that I can follow along and understand what you are saying and learn some very good things along the way.. thanks for all of your video shares.. carry on I look forward to your next one..
@maheen-
@maheen- 5 жыл бұрын
12:24 I am watching your channel for almost 1 year. Because of your accent sometimes i doesn't understand your words(but still its good). for all these days what you are saying was 'dodgy' which i hear as dochy. 😂😂😆
@thesolderingbot4718
@thesolderingbot4718 5 жыл бұрын
He likes to articulate after finishing a sentences by slowly toning down ...Which is great
@thethoughtmaster
@thethoughtmaster 5 жыл бұрын
That circuit picture is a masterpiece, is that a Picasso ?-)
@Mr.Unacceptable
@Mr.Unacceptable 5 жыл бұрын
Use the old A/C input to plug in a 14V solar panel for your dashboard.
@iEx0dus
@iEx0dus 5 жыл бұрын
Nice, I'd like 2 cookie noms
@stoneburner5952
@stoneburner5952 5 жыл бұрын
I love you and your vedios
@aurelimt
@aurelimt 5 жыл бұрын
Bonita calculadora retro !
@DiodeGoneWild
@DiodeGoneWild 5 жыл бұрын
Privileg 825 MD from 1975 :)
@AdityaSingh-jg3je
@AdityaSingh-jg3je 4 жыл бұрын
How to work Sine weve inverter Please make video
@MahdiMohammadi0
@MahdiMohammadi0 5 жыл бұрын
Nice job! btw am I the only one who gets reminded of the PPAP? lol
@milanzizka4636
@milanzizka4636 5 жыл бұрын
A navíc pěkná britská kočička 🙂!
@alphonsesynrem28
@alphonsesynrem28 4 жыл бұрын
It will be a big loss if not to watch any one of your videos. Thank you so much for such in depth explanation about types of capacitors and their applications in different areas. Impressive!!
@Ncky
@Ncky 5 жыл бұрын
There is also a great video explaining just the reason why to connect multiple capacitors in parallel instead of one big capacitance capacitor: kzfaq.info/get/bejne/rd1xga6omJyxmqs.html
@HDXFH
@HDXFH 5 жыл бұрын
Gotta love the cat
@andreasnocker9877
@andreasnocker9877 5 жыл бұрын
Great
@Purple431
@Purple431 3 жыл бұрын
You so smart :)
@takoza5396
@takoza5396 5 жыл бұрын
hehe i rly like ur English accent and your cat ^^ so cute
@venkateshg5186
@venkateshg5186 5 жыл бұрын
Crt TV oscilloscope video!!
@Paxmax
@Paxmax 3 жыл бұрын
Ha! That questionable cover is right up BigClives alley! 😂
@conesillyvalley7182
@conesillyvalley7182 5 жыл бұрын
Why not measure the ESR only at the switching frequency.
@lakiza55
@lakiza55 5 жыл бұрын
Great video. Never trust cheap Chinese electrolytics, i recently bought 1000uF 35V low esr "Sanyo" caps, and looking at the datasheet, these should be much larger than ones i received. They are 1000uF 35V but the esr and "Sanyo" is rubbish. As for the obsolete chip, there are cheap buck and boost regulators for cheap, but they as well come with too low capacitors that are rubbish. I was running a 12V to 5V LM2596S module at 1A and both input and output 330uF caps were too hot to touch after just a few minutes. So i totaly recommend those modules, but always switch the caps to a legit branded low esr capacitors, and also, look at the datasheet for the control chip. The LM2596S recommends 1000uF at the output for dropping to 5V and the modules come with rubbish 330uF, so no wonder they were getting hot and the chip was squealling the whole time.
@lakiza55
@lakiza55 5 жыл бұрын
Also, my local electronics store has "low esr" category but also has "High frequency" category which are more expensive but are obviously meant for high frequency switching.
@uK8cvPAq
@uK8cvPAq 5 жыл бұрын
I had a bunch of those LM2596 modules and they turned out to be rebaged LM2576 or similar since they were running at 52khz and not the 150khz of LM2596. No wonder I was getting so much ripple.
@hpat225
@hpat225 5 жыл бұрын
03:10 . Put the cat in parallele. 🙂🙂🙂🙂🙂
Questionable 2-in-1 USB charger - test, schematic & modifications
38:16
ESR meters and electrolytic capacitors
22:00
DiodeGoneWild
Рет қаралды 30 М.
39kgのガリガリが踊る絵文字ダンス/39kg boney emoji dance#dance #ダンス #にんげんっていいな
00:16
💀Skeleton Ninja🥷【にんげんっていいなチャンネル】
Рет қаралды 7 МЛН
Heartwarming Unity at School Event #shorts
00:19
Fabiosa Stories
Рет қаралды 15 МЛН
#1691 Some Capacitor Leakage Testers
17:40
IMSAI Guy
Рет қаралды 15 М.
5V 2A SMPS - test, teardown, schematic, explanation, improvements
38:59
LED torch with a DANGEROUS charger
39:08
DiodeGoneWild
Рет қаралды 99 М.
12V 2A switching power supply - test, teardown, schematic, analysis
34:34
Switching Regulator Component Selection & Sizing - Phil's Lab #71
17:00
Every Component of a Switch Mode Power Supply Explained
23:10
ElectrArc240
Рет қаралды 152 М.
850W computer power supply - how does it work (with schematics)
42:45
DiodeGoneWild
Рет қаралды 238 М.
Parallel Boost Converters
15:49
Julian Ilett
Рет қаралды 10 М.
The Most Important Circuit for our Electrical Future?! (PFC) EB#55
11:26
24V 10A 240W power supply - schematic & halfbridge explained
37:43
DiodeGoneWild
Рет қаралды 78 М.
1$ vs 500$ ВИРТУАЛЬНАЯ РЕАЛЬНОСТЬ !
23:20
GoldenBurst
Рет қаралды 1,8 МЛН
ГОСЗАКУПОЧНЫЙ ПК за 10 тысяч рублей
36:28
Ремонтяш
Рет қаралды 478 М.
Как удвоить напряжение? #электроника #умножитель
1:00
Hi Dev! – Электроника
Рет қаралды 889 М.
Сколько реально стоит ПК Величайшего?
0:37
Это Xiaomi Su7 Max 🤯 #xiaomi #su7max
1:01
Tynalieff Shorts
Рет қаралды 906 М.