Stress Testing a Cheap DC-DC Converter

Ғылым және технология

Line regulation & load regulation tests with an electronic load
Register for Keysight University Live & See today's winners here ► bit.ly/KULive2 ◄
Subscribe: bit.ly/KLabs_sub
Keysight University Live is happening now! Wondering what it’s all about?
This online event for engineers features tips, tricks, and prizes that will make you an engineering legend. Enter now for daily chances to learn and win test gear.
Learn tips & tricks, hear from industry experts, and get a sneak peek at never-before-seen test gear. You could also win more than $300,000 in oscilloscopes, RF, and bench equipment - you don’t want to miss this!
We will have fresh talks, interviews, and drawings each day this week on the Keysight University Live web page, and each Tuesday 23-March to 27-April.
Twitter: @DanielBogdanoff:
/ danielbogdanoff
/ keysight
Helpful Links:
The electronic load we used:
www.keysight.com/us/en/produc...
The power supply:
www.keysight.com/us/en/produc...
Keysight Bench Facebook page:
/ keysightbench
Keysight RF Facebook page:
/ keysightrf
EEs Talk Tech Electrical Engineering podcast:
www.eestalktech.com
/ keysightpodcasts
Check out our blog:
bit.ly/KeysTechBlogs
00:00 Cheap Amazon DC-DC converter test
00:17 Testing line regulation of a DC-DC converter
01:07 Testing DC-DC converter load regulation and recovery time
01:52 How well did the cheap DC-DC converter perform?
We’re going to test this cheap Amazon converter and see if it actually meets its rated spec. We’ll test line regulation and a load regulation which are essential DC to DC converter tests - You have to know how your converters holdup under non-ideal conditions to make sure your designs work. Let’s start with line regulation.
A line regulation test measures the change in output voltage while decreasing the line voltage, or the input voltage. This device should convert an input of 11-24V into a stable 5V output. We’re going to test it and see how well it holds up!
Our power supply provides the input power, and this electronic load will draw a constant current from the output. We can see on our load that the 5 V output from the USB port barely changes while the line voltage ranges from 24 V to 16 V. However, if the line voltage drops to 12 V, the converter can no longer regulate the output voltage, and it starts to drop. It was spec'd at 12 V minimum, but It looks like they might have exaggerated the ratings a little bit.
Line regulation is an easy, but important test - you absolutely want to know how your device holds up under a load and with varied inputs.
Our converter held up pretty ok, but the line regulation test showed us that the minimum input voltage probably should be rated a little higher. Both these tests give you good idea of how your converters handle real-world situations. Use a line regulation test to see how your converter holds up to a varying input, and a load regulation test to see how it handles changing loads
Today we’re measuring load regulation and recovery time of this power converter!
Load regulation measures the change in output voltage as output current increases. This converter should provide a constant voltage while this electronic load toggles to a higher current. A built-in oscilloscope with markers can measure the change in the output voltage.
There are two common measurements you’ll want to make on your converter. The first is load regulation, which is the difference in voltage under various loads. The second is the recovery time, which measures how long it took the output to get to its recovery voltage.
Using this information, you can determine if the converter you are using will hold up to your device’s requirements and function properly, or if you need a more robust system.
I’m also giving away an electronic load and power supply as part of Keysight University Live, you can still sign up using this link - we’re also talking Quantum electronics if you want to come geek out with me - I’ll see you over there.
Check out our blog:
bit.ly/KeysTechBlogs
#AmazonElectronicsTest #CheapAmazonTest #CheapElectronicsTest #LoadRegulation #LineRegulation #ElectronicLoad #PowerSupply #electronics #electricalengineering #Powerengineering #DCDCconverter #DCDCRegulatorTest #DCDCconvertertest #powertesting

Пікірлер: 114

  • @Dukefazon
    @Dukefazon3 жыл бұрын

    I could watch videos like this regularty, not just when there's a Keysight event. Interesting and informative but I'm just an amateur that is interested in electronics.

  • @groovejet33

    @groovejet33

    3 жыл бұрын

    SNAP!! Me too.... good init 😋

  • @Av-ks8uc
    @Av-ks8uc3 жыл бұрын

    gotta love that great scott t shirt!

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Me too!

  • @danielbriggs2
    @danielbriggs23 жыл бұрын

    More short videos like this pls! Even in a tiny bit more details 5-10mins for example. But excellent work Daniel & team! The ideal would be 50% of videos about your products and things to do on them / features in real world uses etc. And the other 50% of videos just like this on general electronics (but not too basic) that use your kit but don’t explicitly bang the Keysight drum 👍 Keep up the good work.

  • @t_Gecko
    @t_Gecko3 жыл бұрын

    This electronic load is sick!

  • @SoonerRoadie

    @SoonerRoadie

    3 жыл бұрын

    Yeah, not sure I could spring. $2,200 for it, but it does look awesome.

  • @sofa-lofa4241
    @sofa-lofa42413 жыл бұрын

    The Great Scott t-shirt and the Andreas Spiess pointer (double strength version!) were nice touches 🤣 More videos like this please

  • @Rob_65
    @Rob_653 жыл бұрын

    A programmable power supply, multi meter and electronic load are key tools I use on a lot of project. My electronic load has an option to discharge a battery and measure the total mAh rating. Together with a programmable power supply and some scripts I wrote, I can charge and discharge batteries to check the real capacity. Being able to measure not only line and load regulation but also the efficieny at different loads, combined with the option to create a graph of this using a few scripts, makes documenting my design much easier than without those tools. During development, testing cycles with charging, stand by and operating modes of products are invaluable. After initial calibration of my charger circuit, the battery itself and the electronics it takes me no longer than one or two hours to make fairly accurate estimates about charge and operation times of battery driven products I develop.

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Awesome! I'm hoping to do more vids like this with the load.

  • @vgamesx1

    @vgamesx1

    3 жыл бұрын

    That's pretty cool, I have a far more manual solution, take cheap usb power banks and insert one of those super affordable constant current usb loads (or use resistors if you prefer) with a dc barrel jack tacked on to easily swap batteries, then once the power bank dies I can use a hobby charger or my non-programmable PSU to charge cells and tell me the capacity. Also, just to mention, I don't develop products, I just like experimenting with solar and putting battery packs together.

  • @Rob_65

    @Rob_65

    3 жыл бұрын

    I should also do a video on this (and publish my code) to show how and why I do this and what the advantages are. Too bad I only have Siglent tools to work with but these were the only instruments within my budget that have LXI and SCPI that I could afford. I don't know if SCPI commands are universal among different brands, or even different series. I'd love to share my scripts with the community so these can evolve into more useful tools for all of us.

  • @KeysightLabs
    @KeysightLabs3 жыл бұрын

    Register for Keysight University Live & see today's winners here ► bit.ly/KULive2

  • @TrickyNekro
    @TrickyNekro3 жыл бұрын

    That´s a bit too complicated for me, I just stick to the smell test...

  • @marcinkowalczyk647
    @marcinkowalczyk6473 жыл бұрын

    more DC / power videos please @Keysight Labs

  • @PrestonStephens
    @PrestonStephens3 жыл бұрын

    I did not even know there were machines that could do that! Those are really cool and I like the added oscilloscope built in for those measurements.

  • @my3dprintedlife
    @my3dprintedlife3 жыл бұрын

    Great demo! Thank as always Keysight.

  • @stevewheeler6672
    @stevewheeler66723 жыл бұрын

    Good information. I'm not that conversant with hardware design issues, but this seems pretty important to know, and I'm happy to have learned it.

  • @sinan4495
    @sinan44953 жыл бұрын

    Learned something new today. Thanks

  • @justink2977
    @justink29773 жыл бұрын

    I loved that tiny hand

  • @user-pk8fr8ix6d
    @user-pk8fr8ix6d3 жыл бұрын

    Great instruments. I imagine how the right one puts a load on my bank account and draws that on diagram. Bet the recovery time will be insane. BTW, does any Keysight device support Relocation function? I mean if I'm an engineer with almost 10 years of FPGA, SW and electronics experience, but I am in Russia, so I'm pressing Relocation button and BOOM! I'm an engineer at Keysight. Sounds great, isn't it?

  • @yaghiyahbrenner8902
    @yaghiyahbrenner89023 жыл бұрын

    looking forward to the teardown of that electronic load, it looks really really well built, the best I've ever seen on the market.

  • @jonnymakers9560

    @jonnymakers9560

    8 ай бұрын

    You cannot change the resolution...we promptly returned our purchase..it is horrible..and the software is rental ONLY and crazy expensive...really Keysight should be ashamed.

  • @the_bootloader
    @the_bootloader3 жыл бұрын

    I want an EL34143A for my lab now. Damnit ! I shouldn't have watched this !

  • @naveenshankar2096
    @naveenshankar20963 жыл бұрын

    Thats impressive!

  • @OzRetrocomp
    @OzRetrocomp3 жыл бұрын

    Nice to see that you took the advice on Twitter seriously. That's some good gurning going on in that thumbnail!

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Lol yeah I went for it with this one

  • @sobhaks7231
    @sobhaks72313 жыл бұрын

    Is that great scott merch. By the way could you upload more of these kinds of videos.

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Double yes

  • @rkan2
    @rkan23 жыл бұрын

    I'll keep subscribed if this #CheapAmazonTest keeps going as a series!

  • @patycruz5652
    @patycruz56523 жыл бұрын

    excellent

  • @richardgoebel226
    @richardgoebel2263 жыл бұрын

    Those are nice quick tests. Stress test the DUT for a few hours at 110 percent of its rated capacity to see if will hold up. Data recording to see when and if it fails.

  • @Anvilshock
    @Anvilshock3 жыл бұрын

    I'd love if this video was just a synopsis to a much longer video where you actually set up and do all those tests. I admit that it'd probably not be enough to make me run immediately for buying my (next) Keysight just for the sake of it, but I can promise I'd still be watching a Keysight video with a little bit more of bigclivedotcom zen.

  • @Samuel-km5yf
    @Samuel-km5yf2 жыл бұрын

    You forgot to say “Stay creative and I will see you next time!”

  • @KeysightLabs

    @KeysightLabs

    2 жыл бұрын

    I need to work on my German accent for that!

  • @danielcotiga9854
    @danielcotiga98543 жыл бұрын

    Nice upload!

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Thanks!

  • @paryzfilip
    @paryzfilip3 жыл бұрын

    That's a nice test! I'd love to be able to measure my projects using those oscilloscopes! 😁

  • @falkorieger1059
    @falkorieger10593 жыл бұрын

    He's wearing GreatScott! merch.... That's a nice advertisement back 😁👍

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    His channel is great!

  • @frankhobsonKJ4CDM
    @frankhobsonKJ4CDM3 жыл бұрын

    Nice video 👍

  • @Sherwin657
    @Sherwin6573 жыл бұрын

    very nice

  • @cherry.7199
    @cherry.71993 жыл бұрын

    Hi Daniel!!!

  • @MH-sw9fy
    @MH-sw9fy3 жыл бұрын

    I was hoping, to see some smoke. Great T shirt by the way!

  • @andytimmons1950
    @andytimmons19503 жыл бұрын

    Great Scott Tshirt

  • @user-fy9yy1oz8w
    @user-fy9yy1oz8w3 жыл бұрын

    Wow!

  • @nyx3748
    @nyx37483 жыл бұрын

    Wish you had more of an audience for this amazing channel.

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Thank you! We love our community but also would love to have more folks!

  • @Francois_Dupont
    @Francois_Dupont3 жыл бұрын

    do you have a distributor in Canada?

  • @scottwilliams8539
    @scottwilliams85393 жыл бұрын

    Probably should have been (a) measuring the voltage *right* at the input of the converter for the line regulation test with an extra multimeter, and (b) measuring the voltage *right* at the output of the converter for the load regulation test with an extra multimeter, or even better, the DC Load's sense lines. I know this was a simple overview and intro, but this is only a small effort to make it much more controlled, consistent, and proper.

  • @patrykmeller3208
    @patrykmeller32083 жыл бұрын

    nice !

  • @Melonthefox
    @Melonthefox3 жыл бұрын

    Omg awesome

  • @groovejet33
    @groovejet333 жыл бұрын

    Can anyone help? Previous years entry to Win tech?? I had to enter all my details and profession etc. Is it correct this year, I just click on the 2 boxes? 1 entry, 2 for exclusive access?? Ta

  • @LordGryllwotth
    @LordGryllwotth3 жыл бұрын

    If it says it can be in 24v vehicles / boats the voltage of the dynamo goes up to 28v and a little more, and that is what the equipment is getting.

  • @TheAstronomyDude
    @TheAstronomyDude3 жыл бұрын

    That power supply looks intimidating; I've only ever seen ones with just two spinny knobs and a numeric display.

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    It's very doable! Lots of cool features to play with, but super easy to use

  • @nuggetczsk
    @nuggetczsk3 жыл бұрын

    You can really see the difference between the power supply for 2$ vs 1000$. Nice.

  • @rakhiduttaroy8731
    @rakhiduttaroy87313 жыл бұрын

    Hey keysight! Ur lessons are too good. Do you provide such online lecture series? Finding videos serially on YT is a mess... Btw nice and informative video ❤️

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Thanks! You can check out Keysight University for our courses, and we also have pretty regular webinars.

  • @rakhiduttaroy8731

    @rakhiduttaroy8731

    3 жыл бұрын

    @@KeysightLabs thank you a lot.👍❤️

  • @lyorelabiste3339
    @lyorelabiste33393 жыл бұрын

    nice video 😉👌

  • @Anthocyanina
    @Anthocyanina3 жыл бұрын

    is the keysight university event not recording the videos to upload anywhere?

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Yes, the streams are (and will continue to be) on the Keysight University live page here: www.keysight.com/find/KULive1

  • @Anthocyanina

    @Anthocyanina

    3 жыл бұрын

    @@KeysightLabs thank you!

  • @Metalhead-4life
    @Metalhead-4life3 жыл бұрын

    Man I need that power supply lol 😆

  • @cesarizidoro1
    @cesarizidoro13 жыл бұрын

    Many thanks to the Keysight for the excellent initiative in these daily videos that help us with testing and learning!

  • @tanmayvadhera4250
    @tanmayvadhera42503 жыл бұрын

    where are the live links ?

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    here you go: www.keysight.com/find/kulive1

  • @tanmayvadhera4250

    @tanmayvadhera4250

    3 жыл бұрын

    @@KeysightLabs themks

  • @kennethlazo940
    @kennethlazo9403 жыл бұрын

    Wow that means i Can trust them

  • @yosimagna8820
    @yosimagna88203 жыл бұрын

    Sir i want to buy multimeter can i?

  • @JMjayesim
    @JMjayesim3 жыл бұрын

    That cheap dc-dc converter looked like someone smacked on a resistor and called it a day smh

  • @markg735

    @markg735

    3 жыл бұрын

    If really crappy DC-DC converters are you thing, check out a KZread channel called DiodeGoneWild.

  • @StigDesign
    @StigDesign3 жыл бұрын

    I hope you can make a video about using pc psu for Charging car battery or maby how you can do this, since what i think is that they can suply 12v and high Current but i dont think it has Backward current/votl safety and also it sends it constant so it can get hot or hurt the battery or destroy it?, and maby (how what and why) dc to dc converters :D

  • @undersiege3402

    @undersiege3402

    3 жыл бұрын

    you can modify the cheap ones to give 30~35 depending on the feed back circuit in it most use tl431

  • @sofa-lofa4241

    @sofa-lofa4241

    3 жыл бұрын

    Yes, you would need a dc-dc converter to increase voltage to 14.4V to charge a 12V battery, As there is no backfeed protection then you would need the voltage even higher to compensate for a blocking diode (usually 0.6V) If you are serious about building your own charger then I would suggest you use it outdoors, burning a shed down is bad... Burning your house down is far, far worse!

  • @StigDesign

    @StigDesign

    3 жыл бұрын

    @@sofa-lofa4241 Yes thats what am thinking too, Thank you for answer ;D thats why am interested how it can be done and especially safe too hehe :D My brother has a Car Booster in a good brand name and battery in that is dead so i have been thinkin but not tested that what if i connect a Pci-E 12v connector from psu in to that 12v input maby it works with proper saw-tooth or sine wave charging without making the battery hot or bad, and also it has Diode Safety aswell, i know i need to chekk if it has some kind of battery circuit tho :) i dont need to do it but, i know it can be handy to know youst like with cabin in woods with solarcell car battery, Alternator with propeller/waterturbine etc :D

  • @StigDesign

    @StigDesign

    3 жыл бұрын

    @@undersiege3402 oh Nice :)

  • @sofa-lofa4241

    @sofa-lofa4241

    3 жыл бұрын

    @@StigDesign ah, OK, now I get it, not from scratch but using a dead booster pack, Yes, that would probably work as the booster pack will probably run off a 12V battery that is discharged as far as 11V or so, you may be able to find an instruction manual that will tell you what the exact low cut-off voltage is for the booster pack, from my experience (extremely limited!) it is usually 11.5V, 11V or 10.5V (so you don't kill the battery, lead acid car/SLA batteries don't recover well from deep discharge) Solar panels usually output around 17V or so at maximum power point and alternators can be high as well, you may need to limit voltage, So you should be good with a 12V PC psu, these don't usually dip down much under load but I'm totally serious about the 'Not in the house' bit, many electronics tinkerers have burnt their houses down for less... Good luck with the project and stay safe! Don't forget to use all of the 12V (yellow) and ground (black) wires ganged in multiples or you could have problems pulling power out of it and cause overheating issues, P. S. I'm no expert so please double check with anyone you know who deals with electronics for a different perspective

  • @ClaviculaNotoria
    @ClaviculaNotoria3 жыл бұрын

    Powah electronics

  • @QUIX2468
    @QUIX24683 жыл бұрын

    Is that an @GreatScott! T-Shirt???

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Yep!

  • @movax20h
    @movax20h3 жыл бұрын

    Holy molly. This electronic load is on a new level. Built in tests, oscilloscope and automatic measurmenets, high precision. Cool. Cool video too.

  • @bel630
    @bel6303 жыл бұрын

    nice shirt

  • @attackaffection5444

    @attackaffection5444

    3 жыл бұрын

    It's greatscott merch

  • @MrAsdf1980
    @MrAsdf19803 жыл бұрын

    This is like gray magic.

  • @harshadbyadgi
    @harshadbyadgi3 жыл бұрын

    @keysight Giveaway in other video?

  • @polyblank73
    @polyblank733 жыл бұрын

    GIMMIE DA MEETAAAAAAAA please

  • @FuzzyScaredyCat
    @FuzzyScaredyCat3 жыл бұрын

    Wait a second. Extra hands connected to extra hands?! @1:50 ...

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    We gotta go deeper

  • @FuzzyScaredyCat

    @FuzzyScaredyCat

    3 жыл бұрын

    @@KeysightLabs Hands, all the way down..

  • @TradieTrev
    @TradieTrev3 жыл бұрын

    @2:24 That was scummy as giving your verdict for 1 frame in the video of text Daniel! So here it for the comment section to read: "Daniel's Take: this is not a great solution for a car, because your car battery idles around 12.5V, and is around 14V while the car is running. Since the output voltage started dropping hard after 16V, it would impact your phone charging or other USB powered devices. This is why this type of testing is important. If you were relying on this for your device to run and didn't check first it could get you into trouble!"

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    I realized at the last minute of editing that I wanted to talk more, this was my way of sneaking it in :)

  • @stanislavshubin3447
    @stanislavshubin34473 жыл бұрын

    +

  • @blanana_m
    @blanana_m3 жыл бұрын

    Short it! lmao

  • @MarvelEngineer3000
    @MarvelEngineer30003 жыл бұрын

    Bro dmm

  • @ohmslaw6856
    @ohmslaw68563 жыл бұрын

    Looks good enough to charge a phone..

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Generally at the 4.7 V output, but once it dropped into the 3 V range it definitely would be trouble.

  • @hi-vizdadjeans6772
    @hi-vizdadjeans67723 жыл бұрын

    I have to call out that shirt! Must have.

  • @attackaffection5444

    @attackaffection5444

    3 жыл бұрын

    That is greatscott merch.Check him out

  • @cmuller1441
    @cmuller14413 жыл бұрын

    Lame use of good devices. What about the sense lines to check if the device really receives the 12V or if your wires introduce too much drop? 3.2A is quite a lot. When you drop the input voltage the input wires need to carry more current to compensate!

  • @sofa-lofa4241

    @sofa-lofa4241

    3 жыл бұрын

    I use Kelvin (4 wire) connections for this kind of project too, takes the guess work out of it

  • 3 жыл бұрын

    Wrong video? Website tells "Day 5: Function Generators and Quantum Computing"

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Updating!

  • @dimitar4y
    @dimitar4y3 жыл бұрын

    I feel like one of these days, you will be using a "product placement" as a way to shame a product you didn't like :v

  • @undersiege3402
    @undersiege34023 жыл бұрын

    its not a stress test if you dont see flames

  • @shelbysurya5736
    @shelbysurya57363 жыл бұрын

    Again i am the 1st or 2nd commenter because i am the biggest fan of keysight labs, HELP ME! I want some of your machines!

  • @soulshinobi
    @soulshinobi3 жыл бұрын

    Something about the way these videos are edited, they all feel like a trailer for an infomercial.

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    Great!

  • @tommihommi1
    @tommihommi13 жыл бұрын

    0/10, no magic smoke came out

  • @jonnymakers9560
    @jonnymakers95608 ай бұрын

    Keysight electronic loads are complete BS..you CANNOT change the load resolution on the fly...Rigol and Siglent let you do this...why dont you address this crap??? Thumbs down

  • @razhterize
    @razhterize3 жыл бұрын

    nice shirt

  • @KeysightLabs

    @KeysightLabs

    3 жыл бұрын

    I love it!

Келесі