What You Need To Know Before Buying A Boost/Buck Converter
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- Опубліковано 10 чер 2024
- In this video I go over some basics when dealing with Boost or Buck converters (also called step up, step down converters) These types of converters are very useful for increasing or decreasing DC voltage.
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 - - Навчання та стиль
If you got a boost converter that could handle that 11.33 amps, how much amperage would be on the power supply. Like if the power supply were only rated for 6 amps would it burn up
In the scenario, you described yes the PSU would be overloaded. It's important to remember current or the voltage alone doesn't give a full picture. Let's run over a quick explanation. Let's say my power supply can deliver 10volts and 10 amps. And let's assume I have a load on my boost converter of 30volts at 5 amps. Since my load is only 5 amps, surly my power supply can handle this... Right? Well no, because the total power consumption in watts, far exceeds what my power supply can handle. My PSU can output 10volts x 10amp = 100watts. My load is 30volts x 5amps = 150watts. So my power supply is overloaded. I hope this helps :)
For example is you use PC power supply with 12V 15A - its 180W of power. These chinese buck converters have 65-70% efficiency (this is my opinion its not tested) so you will get about 120-130w of power on your output. example 24V 5 A or something like that.
So if I want to run a 50W LED strip that is 24v I cant is a 12v 300w Watt psu?
@@LEO-xo9cz You can use that psu without problems - any 12v psu with 7-8 amps output will handle that without problems if psu is ok and if wires can handle that for long time. PC psu often have 2 12v lines with 10-20 amps. Use some quality psu if you have.
@@krlenjuska Hi. Yes I have 2x 12v 18a lines. I was thinking of using two buck boosts and displays with voltage and current control so I can have two controllable outputs.
I'm an amateur radio operator in the UK. My shack laptop charger (cheap Chinese replacement) was spewing rf harmonics up to 144 MHz. I replaced it with one of the first boost converters you showed to raise the 13.8V shack supply to 19V to run my laptop and all the rf interference disappeared. The laptop takes less than 5A to charge. I stuck the converter with suitable fuses in a die cast box with a small fan and it's been happily working for nearly a year now.
I don’t comment often, but this video was HUGELY helpful in understanding both types. Looking to power a dc laser pointer with a 4s Lipo battery and this is probably the only clear explanation as to what I could use to potentially accomplish this. Thank you!!
dont use lipo, use li ion ... lipo is dangerous.
@@silversrayleigh8980 stop....li ion to us
I learned so much in a short period of time.
Thank you for making such an informative video.
I am a highly certified electronic technician and i have to say that is a very nice shirt
Thanks for a great video. It's people like yourself who makes UA-cam such an amazing wealth of information. Subscribed.
Hail to Schematix. Very informative.
Thank you for the video. I know the principles but always nice to see the Demo. I just got a DC-DC boost converter in my life as a needed device. I bought solar panels to charge a portable power station (all in one battery, charge controller, inverter, USB ports and display). The Solar Panels full available output was not being accepted by Power Station (74 watts and should or could be double over 100-120 watts of panel). The boost took panel volts of 19.3 to 27.3 (adjustable). The power station is now taking 133 watts! The power station accepts up to 30 volts. It appears to charge efficiently or faster the Power stations likes 24 volts. With the supplied AC power brick to charge from wall outlet, it provides 24 volts and chargers at 118 volts. I tried this booster and was rewarded with more power than I can use. I need about 600 watts a day, to charge my 500 watt power station and keep a small 12v portable frig freezer running. The battery from 6pm to 8am uses about 36% of the power station (when there is low or no sun). Now I am fully charged by noon and it stays that way until sunset. I have sustabable power for the frig/freeze thanks to the boost converter. Before with 79% less charging rate I was in a deficit by about 35%. Excellent.
Very nice explanation, I was bit confused when I thought to buy, thanks for the video sharing
Very good explanation thanks. The same principle applies to solar with inverter installations. 12v vs 24v vs 36v vs 48v . 12v setups are usually cheaper and easy to find but is limited do to high current draw. Where as 48v setups need less current and helps reducing cable thickness.
I was able to follow you every step of the way, very informative. Thanks!
Thanks for the video. Very informative to me. Now realize I need to buy a buck boost for a bench power supply.
Cheers from VK2KWW
Thanks, a good, simple & clear explanation that covered some issues I had not before considered.
Oh wow, thank you for the example! I'm planning on making the DIY ATX PSU and using one of these buck/boost converters on the 12V output to get variable voltage, and now have a better idea of exactly what it can and cannot do.
Great video, thanks for posting! Clarified the power & current dependencies & FET sensitivity to those for me! 👍👍👍
I ordered a buck converter 5A. and im happy after watching this video 😊
Great to see these things being demonstrated.
Nice demonstration. Clear and useful.Thank you very much!
very helpful, I'm a noob when it comes to electronics so this really helped. Thank you and greets from the UK
You're welcome :)
Great video, simple and strait forward, even I got it, so thx.
You're welcome :)
This video prevented me from buying the wrong converter! Thanks!
I just ordered a few step-up converters for the first time becasue My microphone receiver needs 13 to 15 volts but my lead acid battery goes under that. I think the voltage getting low is the reason I get drop outs with my receiver so I like to experiment with stepping up a tiny bit. thank you very much for this really helping video.
Excellent explaination..with clear demo
Thank you for this easy to understand video.
Many thanks for this explanation. I was about to buy boost instead of a buck one!
Great video, simple to understand, thank you
Wow.. where have i been.. i didnt even know theses existed until a week ago watching another youtuber use one.. im like what the hell is that. Thanks for the explanation..
Raver Magik they didn’t hit the market until Dec.2019.
That is a nice information you provided! Thanks for pointing out those facts they might sound "basic" but for sure it's something that people who plan to use these items has to know.
As I said, thanks sir!
You're welcome, glad you found the video informative :)
super helpful, I use an Inverter for work and it has always bothered me jumping from DC to AC back to DC for the sake of charging small batteries. looks like i can buy a few boost converters and let my 12v batteries do the charging directly. The converter in my laptop charger will especially appreciate this, it audibly hates the back and forth. I dont think amperage will be a problem in my case as the voltage jump will be minimal.
Absolutely crucial to my understanding, thank you
Nice compare and contrast between all 3 types of DC conversion. Thanks
The lesson illustrates that buck as the default and preferred method as for efficiency not boost. Thumbs up and subscribed.
Very insightful, thank you very much!
Very informative and to the point, well explained.
Very informative, simple explanation
As others say, Thanks clear and informative.
Wow these things are so useful and this video is very helpful.
Useful, thanks for posting.
Great vid / demo. I often find YTers only show volts or amps in their demos or experiments, and it is really good to see you show both input and output volts and amps simultaneously, I can't commend your teaching process more highly, as this is the best way to show the relationships between input and output. So many people trying to show overunity of a circuit or device, and only showing one reading at a time, which often portrays a total misconception of what is actually going on in the circuits. It's good to see people trying to defy the Laws of Physics with their experiments, but are only fooling themselves and others when they dont complete the power equation by showing input vs output. One more thing I will add is, that step up/ step down converters are great for solar setups I believe, as when the sun rises and sets the voltage output is reduced and a step up/down converter helps to take advantage of the lower voltages at these times so as to get a little more power from the solar array. Thanks for sharing, I love your thorough explanations in your vids, keep it up!
CAUTION ; ebat sellers have "Boost/Buck Converter" in the Description, but many ALSO say in the fine print boost only or buck only. Beware friends
A Boost/Buck converter needs TWO coils, one for each function. Often you can see two separate coils, some use a double wound toroid, which is effectively two coils on one core
Cool video buddy. I'm just learning and found it very interesting and easy to understand. I have been playing around with the same boost converter you showed at the start of your video. I ordered a £3 mixed capacitor pack and was sent a boost converter from one of the Chinese suppliers. :) Score eh?
Thanks for sharing!
Awesome video, great explanation fella!
Thanks, well explained
T. Kelly. yes it was.
If I may. In regard to the first boost converter description and 6 amps. The likely XL6009 onboard, is rated at 5 Amps. I doubt the unit will sustain that level with the converter as is. The heatsink seems too small, and a
fan may be needed.
what if my power supply is 24v @ 4 amps and i use a buck converter to drop the voltage to 12v , then will i be able to have a load that draws more than 4 amps, if the buck converter is rated at say 8 or 10 amps? in other words does it give you a current gain as you step down the voltage? could i draw more than 4 amps from my 24v power supply using the buck converter set at 12v ?
i have a bunch of old 24v laptop chargers/adapters lying around that are 24v @ around 3.4A or 4A and i i want to know if i can use a buck converter with them(since i can pick them up cheap like little over $2 on aliexpresss) to power some 12v RGBW 300 LED strips which i will be using with 12-24 controllers
ChaoticaExtreme, The data sheet info on them currently say that above 100 watt, it needs added cooling such as a fan.
Very informative video, thank you.
Appreciate the info. I converted my f150 blower motor to PWM and im trying to boost it to 19v. This helps a lot.
Thanks, you sorted out my confusion. I'll now buy a Buck converter
Happy I could help
Thanks a lot! That was quite helpful!!!
That was a fantastic explanation.
Great vídeo!!! Thanks for posting...
I click LIKE on your vids before I even watch it. Good info, thanks.
VERY USEFUL & CLEAR, THNKS
just thx man! this is just great for me! i wish you al the best!
Great explanation, thanks.
Very good. Helped y understanding
Very good Lecture
Thanks answered a lot I was unclear on 😁👍
nice tutorial. well explained. thanks
Wow, this is one of the best videos I've watched so far on this topic! Thanks for the detailed explanation!
Very helpful. THANK YOU
thanks, it really clarified many things to me
You're welcome :)
thank you very much, very helpful video
What is the brand of your clamp meter?
Thanks for the video.
Great Demo, thanks!
very good explanation.
Great video thanks. Can I charge a laptop (20V - 3.5A) on a daily basis with the boost/buck converter? (off grid?). The unit will be charged with a 100 watt solar panel hooked to a 12v deep cycle battery
Hello from the UK 👍 Thought you'd like this: I got a boost buck converter and 'tested' it on the multimeter and the onboard fuse popped!!! Poop!
The fuse had no base/cup/saddle or whatever it was supposed to sit in....it was soldered directly into the board. It was okay to get at with some pin nose pliers but very busy and crammed with parts to see that I had to put my spectacles on 🤓 I pulled at the fuse and the blue plastic came off, leaving the metal behind. On closer inspection of the blue bit...there it was...the burn mark. So my best, after failing to release the legs from the board with the soldering iron I resorted to soldering a new fuse on top of the legs;bridging the gap again with another 15amp fuse. Yes I did that and I completed my project for my OWN use to power my laptop with a car battery.
Great tutorial. I'm using a 350w ATX power supply to build a Desktop PSU. Would like to add an adjustable converter to get 24v, 10amp. The power supply can provide 12v, 15amp as displayed on it's label. Thinking a 300w, 15amp converter would do the job, or should I go higher wattage and amperage for safety and Chinesium quality factor? All suggestions are welcome. Cheers m8
edit:
Okay, just did the math and see that I need a minimum of a 20amp converter and won't really get that, so I should probably go higher...ughh.
why did you not load the boost/buck converter? you loaded the other two.
Fantastic video, thanks!!!!
Thank you sooo much. I have that 2nd last one on my bench. I was going to use a PC supply and this dc-dc buck converter to build a variable bench supply. I was ill for a while and forgot that I bought 1 and how I was going to use it. I was going to remove the multi turn pots and extend them to the case. I may get back to this since I also have a DC-V a DC_A digital meter but I am considering using the newer meter/converter package, abt $30 usd? Do you have any info or videos on that, THANKS!
Great video!
👍👍
Thank you for the details , can you please share the model number of the buck-boost module you tested over the last minutes of the video , wish you good luck
Hi @Schematix great video Do you know where I could find the schematic for this modules?
Great Vedio and very well explained. Just one question I have 19v 4amps laptop charger and want to run 775 motor at 12v 5 amps will it run is the amps in power supply shud always be greater than amps needed or buck converter will give me more amps even if supply less amps please help
Hi. Good informations. Can I use Buck converter (which you explained with practical) for Charging Li-ion batteries ?? Because it also has CC & CV control right.
I use a pair of 58V 30Ah lithium packs for ebike touring. Charging them with a Grin Satiator and/or a SunCapture 300W folding solar panel. Most of the electronics I travel with are charged by USB but have a couple other devices that have their own ac to dc converters. Can I use the packs with a single dc to dc converter (hoping to save weight) to charge multiple items at different voltages? Maybe have specific connectors for each item and general USB voltage. Being able to charge the packs and then be able to charge everything else off of them with the minimal amount if weight.
What is the current of the input voltage to power on this buck converter? Is +32V, 720mA or +16V, 610mA will work as my input voltage to power on this buck converter?
Great video. Do you have a list of boost / buck converters that are good quality? Seems like it's hard to tell which ones are good online.
Amazing video.
Excellent video..!
Thanks for the video! I have a simple question for you all: what does mean when the bicolor LED is RED? Is the device in current or in voltage limiting mode ok but which one of these two? How can I avoid this behavior?
Unfortunately, that is entirely depended on what the manufacturer decided to color-code each mode with. How I'd recommend you go about determining what each color represents is with no load attached to the converter, whatever color is being displayed should be voltage control mode.
Good job! Thank you.
Hi there, the output voltage of my dc dc buck boost converter does not change when I adjust the potentiometer. Is the problem only on the potentiometer or is it somewhere else ? Thanks👍
which buck converter to use to get constant 2.4 amp at 5v, input voltage 12 volts
I totally did not consider the input/output amperage, thanks for point that out because I was going to buy a bunch of buck and up converters that were the wrong ratings.
I'm glad you found this video useful ;)
Hi, can the converters maintain a constant voltage/current output when the supply power suddenly increase or decrease?
Tq ,,, even i am very bad in english but ~~ amazingly i understand everything you say :D
Thanks
Greeting! Good video! With which converter could it get 5V and 10A so that it can work longer without overheating and shutting down? Thank you
13:45 VERY TRUE THAT. lol. Raised my boost converter voltage and pooped the output capacitor. Definitely be careful when upping the voltage with these. Or make a case.
Good one. Thanks
Thank you for sharing
Here is a question that seems problematic for most people to answer. I currently have auxiliary LED light on my car that have both full light and parking light feature. There are three cables 12v feed for full light, 12v feed for parking light and ground. The parking LED lights are too bright and I need to dim them. As it is in my car, the space is minimal. I would like to lower the light output by lowering the voltage feed to the parking LED with 9V, however this can only be done on the 12V feed wire, meaning I can´t use the negative wire as the negative wire is the same for both the parking LED and the full LED light. Can I use a buck converter and only take the output + feed from it and connect it to the parking light feed wire so it will only feed 9V? or do I have to connect both + feed and - feed from the converter to get 9V feed to the LED?
Hi I bought a while ago 'I used it with 24V output (4Ah) then I disconnected it and after a couple of days I realized that the output voltage did not increase was the same as the input .. could be the trimmer?
Thank you for the video
Hi I was wondering where you could buy that buck boost converter because most seem to only step down
Can i wire a 12v power source to 300w boost converter and boost the voltage to 30v and wire the output to the 150w buck converter to adjust voltage and current for my diy adjustable bench power supply. I am going for this idea as I couldn’t get the buck boost converter.
if i have to be honest i have not much from video, coz i was hypnotized by your great shirt. Man i realy likes it :) Need to by same or atleast similiar.
btw best wishes for new year :)
Always interested to know how things work when use doesn't matched designed intention.
Eg if I want to output 16v from a boost converter but it's supplied from a battery which can be 16.8v fully charged, will it simply output battery voltage until the charge is low enough to require actual boosting? Will this have any detrimental affect on the boost converter?
99% of the time it (battery voltage) will probably be below the desired 16v output but there may be times when it's higher.
@8:59 Veritable Volt Power Supply , much superior the Desultory Volt Power Supply. :) I like your teaching style. thanks for posting. 73's
You're welcome
nice explanation thanks