Electronics > Beginners
Made some magic smoke and I don't know why :/
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MyHeadHz:
OK, after reviewing all of the above, it seems that I'm asking too much for the component.  Lowering the voltage wouldn't really serve the purpose for the project, so I checked out other strategies.

The obvious one was find a higher amp circuit.  There are mainly two IC's that power those devices (like these, powered by LM2587 clones, and these, powered by XL6009 clones.  Both usually claim min input voltage of 3v, but data sheets say otherwise.  Issues with overvoltage (output) are all over the internet because people are trying to run them at their chinesium specs.

So, I decided to change strategies.  Simply getting a second 18650 and running them in series will make life much easier for me. :o

Thanks for the help everyone- I learned a lot!
T3sl4co1l:
FWIW, there are converters that beefy and small.  TI makes a 3A (buck? I forget) that small, and it really does deliver what it says. :)

Maxim should be okay at ratings, but... who knows what clone they stuffed in there?

Anyway, yay for shitty designed, unsafe circuits that can't handle adjustments without releasing magic smoke?

Tim
Chris56000:
Hi!

PTN78020ANZ/PTN78060ANZ?

This little module from Farnell will operate over 3–36V, uses one resistor to set the output voltage, and is about 25 X 40 mm size, and will give an output variable between 11.2 and 22.5 V!

They're listed about £18 but if you make your solder extractor with one of these it'll probably run forever!!!

There are a number of MLCC caps needed for stability on the I/P but it's all explained in it's datasheet!

I've just repaired a DC–DC converter module that's totally unobtainium
by digging out its remains and building a PTN78020ANZ in the original case!!!

Chris Williams
ebastler:
Pardon the slightly off-topic question, but: Why does a solder fume fan have to be battery-powered?

On my bench, I have plenty of power outlets available. (I'll need at least one for my soldering iron!) If this is about soldering "on the go", with a battery or gas-powered iron, I would not bother with a fume extractor at all. Probably no room to set one up anyway in that scenario, and I don't want to carry it...

Personally, I would very much prefer not having to bother with recharging a battery, and would just power the thing directly from a wall wart. Preferably one with the correct voltage, so I don't have to bother with voltage converters either.  ;)
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