Testing A 300W DC-DC Converter

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Taking a look at some nice DC-DC buck converters from Aliexpress today - they are surprisingly good with relatively beefy heat sinks and have very few down sides.
Get yours here:
DC-DC Buck Converter (Aliexpress):
s.click.aliexpress.com/e/_9AFfuy
DC-DC Buck Converter (Banggood):
www.banggood.com/custlink/GKD...
DC-DC Buck Converter (USA Amazon):
amzn.to/3FOWEaT
DC-DC Buck Converter (Canada Amazon):
amzn.to/3IvbNQn
Kaiweets HT118A (USA Amazon):
amzn.to/33ywbBG
Kaiweets HT118A (Canadian Amazon):
amzn.to/3tMN3iu
DC Electronic Load (Banggood):
www.banggood.com/custlink/mvm...
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1 июл 2024

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Комментарии : 94

@user-hk3ej4hk7m Год назад

Usually these modules do current limiting by overriding the feedback pin on the buck controller, this means that if you suddenly shout circuit the output the current will be very high while the caps discharge and then go down as it starts gaining control of the output voltage. Because of this, I would advise not to connect a multimeter alone in current measuring mode as you'll be discharging the output caps with it, and maybe blowing the 10A fuse. Lab bench supplies have an active filter (power bjt or MOSFET with resistors in series) at the output that drops the voltage very quickly, reducing the short circuit transients, thus why it's fine to set the current limit using a multimeter. However, it's possible to use the multimeter alone to set the output current, just start with a very low voltage and only then put the multimeter into current measuring mode, that way the output caps will not be charged to a "dangerous if short circuited" voltage.

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@JonnyBergdahl 2 года назад

Way better results than I was expecting. Would have been interesting to see how itm behaves on 5V though, like for serial RGB LED strips.

@englishvaccine Год назад

Thanks from Srilanka ! Learnt how to adjust the current in this module.

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@James_Cook_Explorer 5 месяцев назад

Thanks for this test.

@sitelerankara 5 месяцев назад

Thanks from Srilanka ! Learnt how to adjust the current in this module.👏👏🤲

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@uwew6126 Год назад

Question ? We is the Sinus Wave and the Ripple. Your Video is very good.

@electroniquepassion 2 года назад

Bonjour, il ne faut pas trop demander à ce genre de module ! Les Chinois sont généreux sur leurs performances 😀. Merci pour cette présentation 👍

@SimpleElectronics 2 года назад

jusqu'a date, ils fonctionnent pas mal bien! J'en suis surpris!

@chrisbritton8326 6 месяцев назад

Im charging 26650 lifep04 with that same dc to dc buck converter as i write this. I did relocate the voltage and amp pots.

@GentleGrooves. 5 месяцев назад

Nice Experiment !

@bwselectronic 2 года назад

Current limit gives more capability. If I get one, that's what I try to get. I also try to get buck/boost. Gives you more possibilities with the combination. Same idea as the MPPT controlers for solar. You may not get as high of current, but you get say 40v out if you've got 20v or 60v in.

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@collinsmwaura1833 Год назад

For safe operation as a battery charger, or in case where it's output is connected in parallel with other voltage sources, you have to enable "Diode Emulation Mode" in the LM25116 controller. Otherwise this buck converter might destabilize into feeding large reverse currents back into the input.

@MegaCyrik Год назад

Tell me more. I use a few in parallel. So if i use one, or a few, to charge a battery. And then use a car charger as well on same battery, it might run the wrong way?

@byondlight Год назад

Paralleling with resistors? Oh, I should have taken school more seriously.. what size? I'm still looking for diy for dummies video. And if the buck is rated for 300 watts does that go for the imput as well?..

@NOOTSMAZDAS 2 года назад

Them heatsinks make my mouth water 🥰

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@yankovalsky7696 Год назад

Hi, thanks for the video. What is the minimum current that can be obtained on this converter for 5V and 12V? I saw for a while in your video 1A for 12V when you turned the CC potentiometer to the minimum value.

@alfonsneumann1878 Год назад

On a review of an aliexpress buyer I saw a comment that the lowest setting was 0.6 A. My guess is varies from converter to converter, but is rather high.

@MykTAOfficial Год назад

Can you please advise as I'm thinking of using this as a DIY charger from a 24v supply and down to 21v 3.4A Do I need to put a bit of headroom like (21.1V and 3.5A)?

@SimpleElectronics Год назад

No you can go directly to 21v

@VastCNC 2 года назад

Have you tried the kaiweets smart meters? They seem to have some handy features, but wondering if the accuracy is still good

@SimpleElectronics 2 года назад

I have not - they seem to have stopped sending me stuff - oh well!

@petervoss2317 11 дней назад

Can I use this device to drive a 12 V 8 A motor from a 550 W 48 V solar panel ?

@jackrobin8801 9 дней назад

So it can Boost low current to high current? Ex: 1 amp boost to 10 Amps?

@rajupavhane8304 Год назад

Nice information

@DaJetzi День назад

Can you recommend a boost converter with low RF noise, birdies, etc.? Preferably a module from Aliexpress, but there are so many. The converter should deliver a maximum of 19.5V and 10A at 13.8V input. It's intended for a mini-ITX motherboard used in an all-in-one SDR. Do you have any suggestions?

@SimpleElectronics День назад

That's pretty specialized - you'll have to spend some time reading descriptions!

@marox3G Год назад

Good video! With which converter can I get 5V and 15A at the output so that it does not overheat and shut down? Thank you

@SimpleElectronics Год назад

You just need a 75w + capable buck converter

@marox3G 7 месяцев назад

@@SimpleElectronicsThank you! With what you're presenting, would you be able to achieve the parameters at the output 5V i 15A?

@ibmezouar 2 года назад

Hi, cool video, thanks! Could you please fix the link to the electronic load module? The one you have in the description actually points to the dc converter and not the load.

@SimpleElectronics 2 года назад

Hey can you try again? when I click it it brings me to the load?

@ibmezouar 2 года назад

Thanks for the quick reply, it's working now, I don't know why it was showing something else before.

@perspectivex Год назад

Can you tell me if you can limit the current at the low voltage limit? I.e., I have one of these DC-DC converters, set the voltage output to 1.2V (the lower limit) then wanted to limit the current to something like 0.5-0.8A but the lowest current I could get was 6A no matter how much I turned the CC potentiometer. I guess if the module controls current by lowering voltage that's a problem since it has nowhere to go at 1.2V, but I just wanted to ask since you have one of these modules too.

@SimpleElectronics Год назад

That's an interesting observation, I'll take a look

@perspectivex Год назад

@@SimpleElectronics thanks a lot

@lezbriddon 2 года назад

could ne handy for the ebike/emotorcycle people for getting 12v for horns and lights etc, but i dont think these go upto like 80-90v in?

@SimpleElectronics 2 года назад

I don't think so no.

@leifsalomonsson5426 Год назад

Interesting how it violently self oscillates when hitting current limit.

@louvasque Год назад

testa com motor de esteira, quero saber se ele faz o motor funcionar e se a força do motor continua a mesma

@LostSoulsMed. Месяц назад

Can I parallel two of this units and set their output voltage and current the same?

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@Mr_Accoustic Год назад

I am using 24V, 3A dc power supply for my project. I need 5V output and 800 mAmp Output at same time. Does decreasing the voltage will increase the output current.... as my arduino can't handle more than 1Amp and need 5V at same time. Can I use this. ?

@Luke-san Год назад

Was just checking for reviews on this module and guess what, I already saw it since I am a subscriber. Seems this module is being used for a cheap MPPT on hackaday (Low cost solar panel solution (MPPT + sun tracker)) . I'll probably buy it and try it myself on my 100 Watt panel.

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@MrIMacro Год назад

Thanks, but how did you draw a 2 amp current without a load at <a href="#" class="seekto" data-time="441">07:21</a> ?

@leeqa02 2 месяца назад

At 0.96 volts on the output of buck converter, in current limit mode, the voltage will decrease, resulting in reduced power.

@boxoflazuardi9421 7 месяцев назад

So CC setting in this video is with 10A multimeter load? How about using external load?

@SimpleElectronics 7 месяцев назад

No, you have to set it with a short-circuit, the multimeter is acting like a short circuit here

@omoredeamadasun7821 Год назад

Does this module have anti-backflow when the battery is connected without first connecting the module to a power supply?

@SimpleElectronics Год назад

I'm actually not sure about that - hmmm

@barryminbiole6199 6 месяцев назад

Can you recommend a diode for protection?

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@wildalentejo750 Месяц назад

Can I connect this directly to my 250 watts solar panel to give juice to a 100 watts water pump?

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@shivamjayswal8753 9 месяцев назад

Can i remove constant current pot to get current as load require to drain it as per it's need.

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@mohinderkaur6671 Год назад

Dynamic test with a badly filtered unregulated supply as input - like what you would get from a transformer-rectifier filter cap feed a load would be interesting

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@jonyjoe8464 Год назад

thats pretty good, I didnt think it would do more than 10 amps.

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@Marroca-te4co 5 месяцев назад

¿Model, Type or Number Part? TESTING Atorch Baterry Tester/Dc Programmable Electronic Load. Please. Thank you very much for your attention.

@sylvester2294 Год назад

Can 4 of these be paralleled to charge batteries from Solar panels?

@SimpleElectronics Год назад

On the input - yes. On the output - not likely as they would probably fight each other to regulate

@MindMeetMaker Год назад

@@SimpleElectronics Would using diodes on the output isolate the feedback voltage between them? And allow them to regulate and share the load?

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@tyzik_swift 8 месяцев назад

do you know a dc-dc 200+watt with a shunt on the positive side?

@anwin85alon 21 день назад

Pm me can you to install do sola paint of charger..

@gigigigiotto1673 2 года назад

BAD EXPERIENCE with that design, the Buck controller (on the other side of the pcb) blown out after regular use below the rated current, and the lack of printed model number and tiny pins makes it an hassle to replace. If you buy a product with this design, i suggest to add a small heatsink on the controller. Talking about heatsinks, the ones on the mosfets seems to work pretty good

@SimpleElectronics 2 года назад

What current were you using it at? Under 20 is pretty vague, I would like to know precisely if possible.

@gigigigiotto1673 2 года назад

@@SimpleElectronics i can't remember clearly since it was 4 years ago, but if i'm not wrong i used to chage li-ion batteries around 8-10A. I always had a fan on the heatsinks, but the other side of the pcb was always in contact with the wood table, so 0 airflow

@loggjohnable 2 года назад

@@gigigigiotto1673 Same, mine started smoking after 1min, but the top was fine

@loggjohnable 2 года назад

It even gets very hot without any load, but maybe mine is broken

@bwselectronic 2 года назад

I see you had ferrules on the wires. Ferrules definitely make life easier and safer.

@SimpleElectronics 2 года назад

I love ferrules!

@bwselectronic 2 года назад

@@SimpleElectronics When you hear the stories about fires from 3D printers that the manufacturer tinned the wires instead of using ferrules, it makes you think.

@Luke-san 2 года назад

@@bwselectronic I never ever have used them. Maybe I should after reading your comments.

@plainedgedsaw1694 2 года назад

@@Luke-san from what i read, solder filling end of wire is worst possible thing you can do there. Normal stranded wire should be good enough with some maintenance, also i heard those 3d printers just send too much current thru too little connectors.

@Luke-san 2 года назад

@@plainedgedsaw1694 It made me think. Ideally it would be copper from the wire directly to the other point without anything in between that could be more resistive. I just checked it. Solder has about 6 times more resistance than copper which can explain that during high current these things heat up. But resistance is linear to the length (or thickness in this case), so in case of just tinning a wire I would suspect that the resistance is very very low. From what material is a ferrule made and what is the resistance? Questions lead to other questions in my head. (during a weekend damned) . Might be worth an experiment or some more input on how and why.

@paolopoggini4401 Год назад

The problema of this module Is that broken itself. I ha have Just substitute four of this, but i don't understand because...

@Charly-hz4xk 4 месяца назад

Man kann nicht die Eingänge sehen welche Eingang Spannung 😊

@jec_ecart Год назад

You're lucky to have such cold temperatures. Here these devices (& humans) overheat quickly. Ambient is 37 to 40.c

@SimpleElectronics Год назад

That;s way too hot, I would melt!

@fredflintstone1 2 года назад

No smoke😞

@SimpleElectronics 2 года назад

Not this time :)

@sathyaprasad1411 Год назад

👌👌👌👍👍👍👍🤝

@RestoreTechnique Год назад

Damn i wanted to use this, but i need 15A at 12V (unmonitored), and my 4S3P 18650 battery pack is between 16.8V and 12V, so not always 3V difference. 😖 Doesnt look like i can use this 🫤