Buck Converter Teardown - Juntek DPM8650

[@jlucasound]

My Goodness, what big capacitors you have!! All the better to smooth the ripples with!!

[@JulianIlett]

Sounds rude ;)

[@alaricsnellpym]

What's the target market for these kinds of buck/boost converter modules? Bare-PCB buck/boost modules with voltages set by trimpots, I can understand - the're for nerds like us to make out of things - but this one in its nice case, with a control panel to adjust the limits, feels aimed at consumers. But who's buying these things, and what for?

[@himselfe]

A fancy buck converter for the more discerning nerd.

[@jlucasound]

@@himselfe "Pardon Me, would you have any 22uF caps?" "But of Course!" (Grey Poupon commercial) 🤣😂

[@rilosvideos877]

Thanks for the interesting review. Thhis module seems a good bargain - if there were not the unpleasant peculiarity of etching out all Identifiers of the main components and ICs. This way its not really servicable - in case anything bad happens. Probably you could find out if you investigate deeper - but this behavior is simply annoying. Would be interesting to see this thing in a heavy load test for an hour at least and to measure the temperature of critical components. Also overall efficiency under different load situations and input/output voltage relation would be interesting. Also the ripple on the output in different situations would be of interest. So there is some room for a deeper look 🙂

[@TuttleScott]

what I was thinking too. they dont want anyone to know they stole their design I guess.

[@EsotericArctos]

A lot of cheap Chinese, and even some very expensive not made in China products, have the identifiers of the chips etched off in order to protect intellectual property. It is not an uncommon practice and is not a reason to not buy a product if you have a need for it. This looks quite well made for chineseum.

[@TheEmbeddedHobbyist]

such a nice gentle teardown Julian, where was the hammer when you needed one. 🙂

[@Beansswtf]

Juntek, how very close to junk tech. They certainly dont pick their company names well

[@stevvieb]

They obviously copied it from somewhere and never understood fully

[@johnnodge4327]

No the Chinese aren't good at choosing names that inspire confidence. I always thought Ultrafire to be a very strange name for a brand of lithium batteries, especially a poor quality brand of them.

[@EsotericArctos]

It's like some of the Chinese restaraunts. They are not very good at the translation of names that make sense to them to names that are meaningful in English. That said, this device loosk well made enough to possibly not be junk tech :)

[@jamest.5001]

Do they make a boost version?

[@Dc_tech386]

Those capacitor or so difficult to find

[@EsotericArctos]

I don't think that cell in the remote unit is a LiPo, It looks like a standard Lithium Ion 3.7Vold cell not LiPO. Can you confirm? I doubt the rating on the cell is accurate. How long does it last before the remote needs charging? Is there software available for this? Maybe the USB is for interfacing to a computer or it might be just for firmware.

[@JulianIlett]

I just called it a LiPo because that's what lithium ion pouch cells are generally called.

[@lalbabugupta8380]

Sir i want your transrceiver code please send link😊

[@YQTFun]

Thanks for carpet bombing my feed with your library. Good bye.

[@JulianIlett]

Welcome to KZbin :)