Building a Buck Converter? Here are some design Tips
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- เผยแพร่เมื่อ 10 ก.พ. 2025
- There are many pitfalls during the design process. Here are some tips to get you started :)
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Information provided in this video is for educational purposes only.
If you attempt to recreate/replicate anything you’ve seen in this Or any other video, you’re doing so at your own risk.
Schematix -
You know it!! Sign me up for one of those converters when you're done. Another Great video by Schematix!!!!
Dunno how I haven't seen this channel till now. Jlcpcb advertisement got me to immediately subscribe.
yes for me would like to buy kit when it's available great vid thanks for plainly putting it across like you did
Thanks for your interest! Hopefully, I'll have the kitsets ready soon (hopefully within a month or 2)
11:36 That is also the reason why I mostly build powerful voltage converters (except for mains voltage operated ones) by myself. The cheap ones out there mostly have crappy chinese capacitors and lie about their maximum output power. And if you build them yourself, you also learn something while doing so. Great video! Keep up the good work!
Re board layout, you can improve noise more -- especially EMI/RFI -- by avoiding PCB tracks altogether in the main current loops of the buck converter. Place power components first, in locations that allow you to use wide copper pours to connect them together. A 0.050" or even 0.1" trace width is not enough to make a difference; it needs to be *very* wide compared to its length. In addition to reducing noise, this also helps to sink heat from the power components. Once that's done, place feedback components next, and keep them as close to the control IC as possible. Fit everything else in last. Neat project! You can learn a lot about high frequency circuits, PWM, control theory and filters by playing with switching power supplies.
Definitely good advice here, One more tip I can recommend to get around the wide track issue is to leave them exposed (no bottom mask) which allows you to tin the tracks with solder.
Had to sub. Very professional and informative channel. And your wit has much brevity. A breath of fresh air when I'm afraid to breath. Keep up the great work, and thank you so much for doing that thaing you do! Cheers from Utah!
I missed this video last year, sign me up when you have come up with a good converter also. Thanks for the great and informative video.
I'd definitely buy a high quality buck converter like that one as long as it's decently priced.
Freshly picked PCB's just like the one's grandma used to pick! Where I live we have components growing everywhere! Lets hang out, my friend has solder and flux growing and ready to pick. We also have scrolls starting to bud on the trees, turns out they're specs and schematix.
Hahaha that farm intro ... And thank you for the tips
Very nice video
Friend, your videos are excellent, very good considerations for buying, designing and knowing the AC / DC sources.
Yes I would buy a diy-kit of your buck converter. Also a buck-boost-converter with konstant corrunet feature would be great.
that's a great video thank you, i will love to buy good diy buck converter, when you finish the buck converter can you make it modular instead of 8a the customer can choose different amb rating like 8A 12A 20A 30A.
Hey being a relative novice I enjoyed that explanation and understood what you were conveying well. Fantastic, thank you. I have a big old toroidal transformer that I wand to use for a ZDS heater module. Trouble is it is going to end up at around 50volts out and I need to drop this down to 30 - 40 volts at 20 amps out.
Thank you very much for your great and explanation!
Nice job!
Yes please! Def interested, also struggling to find..
I too would be interested in buying a kit! Thanks!
yes great video and well done on the demonstration and explanation. would be interest in a few of these and if possible few without out parts to experiment with . Cheers from Oz
An excellent and concise presentation as per usual... WELL DONE!!! 10/10 I would be interested in purchasing one or two of your buck convertors.
Good vid. looks a lot better than any you could get on ebay. and a lot safer.
How about a high quality boost buck converter with cc and cv kit? That, I am highly interested in.
Answering the question asked at the end of the video:
I'd be interested in a buck converter with 12-53vdc wide input power and two output rails up to 20A each: 12v and 5v.
Or maybe a video on how to make one? :-)
Still possible to get the esquematic of this one in the video? As well some insight of if the SG3525 its a good pwm signal, paired with a gate drive IR2111 for a buck converter?
Great. Thanks.
I used a cheap Chinese buck converter with a high current HP plug pack (18 volts 10 amps) to make a variable power supply. The Chinese buck converter introduces a ridiculous amount of noise. Look forward to seeing a decant buck converter kit.
very informative simple and easy to understand , i have the same problem with 3.7 volt li-on chargers , i have only been experimenting with electronics for 18 months and have attempted to build several chargers , some will overcharge some will under charge , i dont fully understand the auto cut off . have you any advice for a keen novice wanting to build a 2 or 4 battery charger with auto cut off that can run on 5v dc , 12v dc and 240v ac ? thankyou .
Hi I just started to learn electronics. May I ask is it possible to to have a buck converter that outputs 400 mA?I have a 12 volt led light but only draws very few mA. Thank you I am trying to place a light that is good enough to close and open the gate for the 20 or so houses here. Thank you
I will be more than happy to buy your kit when avalable. Thank you
I'd definitely purchase some!!
I would be super keen on these kits........getting back into electronics after a time away.........do you have a link yet where i can purchase these?
I would be very interested in your 8A kit, especially if it has CC capabilities as well.
One question; the board you showed uses those screwdriver multiturn pots, is there any way of electronically controlling the output voltage or current (op-amps, arduino, etc)?
Either way I'm interested in the kit 👍
A litle late but yeah. There is a way using a digital resistors i have seen them in other videos or if the converter used a standalone FETs you couldve used a uControler to drive the FETs but the guy is using a complete IC for the switching
I’m now moving to New Zealand for them pcbs
Wow man i wish you were my neighbor or something i need a mentor
Great video! I love learning about electronics and trying to understand how components work together. Any idea on when the kit will be available. Ive been looking for a high quality buck and boost convertor without much luck. I've bought several of the cheap ones and most of them have self destructed on the first couple uses.
Great video, i now vaguely understand them :) i will definitely buy a kit when available. Thanks
does the xl4016 module need a free wheeling diode at output when the load is inductive?
Good explanation.
Very neat and a well presented programme much like the project itself gets 10 out of 10. Full marks but I must state sheepishly with so many formidable"tools"and every exotic component at an arm's length away this is pretty well expected, obviously something that would be every well-wishers envy out here. Your doin fine mate. Keep sailing and God bless. Bye from India.
Thank you 👍👍👍
Hi Schematix. Great video. I learned so much. I am also keen to buy a kit.
Yes, I'm in.
I want to build a building* to charge the bike battery. 36V
I bought 2 sources 24 V x 5 A.
Can you help me build a 42 V x 5 A building?
I saw many constructions on youtube, but with low current 1-2 A.
Thanks !
(building = Mounting = montage = assembly ...
I'm sorry, I don't know which word is correct? )
If I get the kit and take the pot off the board and put it in a panel for an adjustable bench top PS will I be introducing noise from the added wiring? Any other considerations? Are you going to do a variable constant current version?
Thank you! I learned stuff.
Are these kits available yet?
I’m definitely interested in buying one! I’m also in need of a buck converter that can do 30 volt down to 12 volt and handle 50 amps. If you have something like that I definitely need one!! I would like to buy a kit and assemble it myself if possible.
Thanks,
Ben in USA
Do you have a simple buck converter circuit that steps up 1.5V to about 152V at 1A max? It must function just like a power supply.
How can I order one from you that you have made in this video? But I want the one with adjustable knob
Hi schematix could you provide the schematic of the final design?
Just for an experiment, can you use the buck converter as a generator for the boost converter??? (Connect the buck converter and the boost converter together) is it going to make the loads to last more longer??? or you can just use the buck converter instead...
Great informative blog,
Thanks for sharing.
Sweet design. How much do you think you will want for the parts and the circuit board?
Why do you need such a huge buck converter? Do you think you might tackle a boost converter?
Good questions Dan, I estimate the kit will retail around the $30USD mark. Why so big? More power = more better ;) Joking aside, the real reason is finding a low ripple/noise, high-current buck converter isn't exactly easy or cheap. Yes, I plan on building various kitset's including a boost converter. In the future, I'll look at building a smaller buck converter, perhaps based on the popular LM2596?
Yes, I’d buy such a kit, or even an assembled board.
Great video tutorial. Thanks. Is your kit set out yet?
lol. wild pcbs. I would love a HQ buck converter. I need them for driving 100wat LEDS. Usually in groups of 4-8. Ones I need break the bank usually being 30+ dollars.
I'm interested in your buck converter kit or even just a pcb with a list of parts.
More videos like this are lacking on TH-cam. Maybe you could create others with other lessons learned. Perhaps make videos on step up converters and ???
what if we increase the turns of inductor used in buck converter or booster??
sound good t me sign me up fr oone ooof those converters or the kit set thank u for the video
I'll take a kit if shipped to Netherlands, if affordable, and would prefer a collection of kits if you plan to expand on this format to include more universally useful hobby gadgets.
By it's very nature, you're always going to get noise on the output of a SMPS especially as you vary the load. Sticking a CLC Pi filter on the output with some additional small caps for the HF noise should help a lot. Why are you so interested in the noise? If you're just running some digital stuff then a few mv of noise won't affect it. If you want to also power some analogue stuff, run a linear converter just for the analogue which probably isn't taking much current?
Great,can u put pcb designing videos
How right you are about finding good quality converters or anything else online , it's kind of hit and miss unless you go to a premium supplier , but I don't know too many people with large bank accounts. So when you get your gizmos designed and ready please let me know , I'll definitely like one or two unless they're cheaper by the dozen . Thanks for the video, it made me feel better knowing I'm not the only one that has had the problem of finding good stuff online.
Hey, I am on the same page as you. Trying to find a good quality one but no luck....
I need to make a 400v 200a buck converter for a special type of tesla coil any good tips?
Australian. In line to buy.
Have you released a kit yet or at least a circuit diagram and pcb?🙂
"YaMumsHotNewBF" that is one awesome patreon supporter ahahaha
I am interested in the kit!
Noice work. I'm looking more for a good buck boost.
I'd love to buy a kit, think about using a Mylar, Filter cap just before the outputs for noise.
63v 1uf
Can you share schematic your final project? Thanks
clever sponsor clips :D
can you recommend me an 80v Ic input
Great video and I would buy a kit thanks
I want this
can u upload the schematic of the contant current feature buck convertor which u have shown in the video plzzzzz ?
What’s the voltage range and max current of your converter?
I need schematic of this buck buck converter
Very good and practical description, thanks. I'd be interested in a high current unit - 20A+ or more. Sign me up for the 8A unit while we are at it too.
8A is impressive! That blue/green toroidal inductor probably has a very high permeability. Perhaps more exotic and expensive than my bag of yellow/white (u=75). Have not been able to find good information as to the upper limits of switching frequency vs inductor core material, though it seems that toroids are not suitable for modern/fast 1MHz+ converters.
Thanks! Yes, Yellow/white toroids are also very popular for high current applications such as buck converters. You're right about it being difficult finding info on toroids for easy comparison between different materials. It can be quite frustrating to research.
@@Schematix I just watched your inductor video ... and like that Coil32 app/site. Looked up the XL4016E1 as well, and it is expensive ... over 0.55$US ea. I am scratching my head wondering where to get a diode that could handle the current surge for an 8amp buck ... (datasheet) That MBR1545CT is an odd beast ... did not even know they existed. My lousy 5A diodes already have legs that are so large, they are unmanageable. You built something unusual here, that I think few people could appreciate, unless they already set out on the adventure of building a high-amp buck converter.
@@GnuReligion It's surprising that there really aren't many (if any) affordable & quality 'high-current' buck converters available online. I mean it's 2020 not 1920 lol
@@GnuReligion I'm very curious why would you consider 0.55 $ to be expensive. I searched this IC now and i see it's around 1 $, but i would still say it's dirt cheap (and i live in a poor country, pretty much considered third world). Speaking of diodes, i see BYW 29/200 can handle 8A continuously with an 80A surge, but that would be a bit to the edge. You would want to have a better diode, such as BYV 32/200 (16A cont., 100A surge). This one costs about 1.2 $ in a local store in my country. So again, dirt cheap. What exactly can you buy with 2 $ in your country that makes you think this is expensive ?? Here i cannot even buy a single fast food meal. And besides that, you should know quality doesn't come cheap. www.onsemi.com/pub/Collateral/BYV32-200-D.PDF
@@444guns Ah, that does look like a fine high-current rectifier. Perhaps, for what it is, the XL4016 is not expensive. But most of my applications are low-current, so I have affinity for the smaller, less expensive, high-frequency bucks. They take small inductors, and small caps. Less weight, and less PCB real-estate. www.aliexpress.com/item/32845576926.html
First thing I did half way through the video is try and find where to buy a PCB or kit for that converter.
Yep I'll buy a bc kit.
ખુબજ સરસ આભાર
That's a great video to introduce a complete beginner to the priciples. I am looking to step down say 300 volts at 10 amps from a remote solar array down to 20 volts to charge up already existing local 12 volt batteries via existing controllers. I have no idea how practical this is. Can anyone here give me a steer on it?
can you pls share the gerber file? thanks in advance
Buck/boost combo or 2 separate kits.
Sure if the price is right. :)
Heyyy i love your videos. I need some help please
i have 2 electric motors each 12v
Then i have a LED light strip also 12v
And then theres one more UV light also 12v.
I have the breadboard
A arduino uno
A Drok timer delay controller 12v-24v
And A dsd tech hc-05 bluetooth module
My goal is to use my phone to set a shutoff time for the 12v LED lights and the the 12v electric motor is there any way that you can make avideo of something like this
It sounds like an interesting project. I'd like to play around with Bluetooth switching. However, with my current schedule, it will be a while before I get around to it
your project will revolve mostly around programming your arduino to receive a timer input, and then simply switching the outputs off. check out dronebot workshop; he has a bunch of arduino tutorials for all the parts of your project. if you're not comfortable with coding, you might want to look at XOD for a graphic interface for your arduino coding.
easiest way i can think to do this is to use bluetooth adapter to connect to the Serial Monitor, parse a number for timer from the serial monitor, and then get a four relay module and just switch the relays once timer is up.
@@Schematix its cool im always learning from you brother thanks so much 💪💪
@@carlos2004 thank you so much i really appreciate ill get on it definitely need to get on XOD
I was looking fo a mule converter...
the constant current circuit?
Sir upload buck converter step down input 24v to 72v output variable 15a with uc3845.
I'd buy a kit
Sign me up for one of your kits!
I'll buy a diy kit or working product 💞
Shut up and take my money! LOL
i'll buy your products.
why does it sound like he keeps saying butt converter
As per your recrimination of using Chinese waste products implemented in products destination for North America are not for me Thanks