Electronics > Beginners

Need help! One more LTC3780 Fried!!!

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chiken:
Hello, so i bought this little "thing" from ebay, because i needed regulative psu, for leds and some batteries... but what happened is that i hooked it up
and it worked for maybe 20 seconds and i heard nice sparkling and had some fireworks  :-BROKE  :palm: , and i removed heatsink and found that 2 mosfets are bad, one got shorted and fried another one
(RU3060L, i cant find them to buy, so if you could tell me where to buy would be also helpful), so does anyone what happened and what should i do now?
Should i request ebay refund, because im sure i did not do anything wrong, connected to 20V battery, NO I DID NOT shorted output because i used VOLTMETER, and i DID NOT connecteed input backwards...

seller said that he would send me another one(which i highly doubt because hardly any seller sends another one, just waits for it to get too old for any compliants)
i mean it wasnt too expensive but 15$ is not cheap for me as a student...
what do you guys suggest?

Cliff Matthews:
Normally advice is given and taken quite freely, but you have not given enough to allow anyone to help! You need to consider posting a picture, schematic, connection diagram or even a link to what this little "thing" is.. I suspect it's a Chinese module? If so, post a link from where you bought it.. at least we can see the product to get an idea.

There's always a reason fro not getting a reply, but Welcome to the forum!

chiken:
Wow, damn i was entirely sure i linked picture of it but it looks like i did not  :palm:
Anyway it says like this : ( LTC3780 Automatic Lifting Pressure Constant Voltage Step Up Step Down 10A 130W )..
Voltage can be adjusted from 0.8 - 30Volts, and current limited to 150-10AMps...

I dont know how to upload image so heres a link https://imgur.com/a/PMY2kHU


Cyril.Anthony:
You can buy the mosfets here
http://Https://lcsc.com/product-detail/MOSFET_Shenzhen-ruichips-Semicon-RU3060L_C107709.html

What is the rating of the LEDs and how many you were trying to drive?

Sent from my SM-G950U using Tapatalk

chiken:
One, 10watt one, it worked (used it 5 seconds because led doenst have heatsink so it would overheat if i used it more) but board died when nothing was connected to it, after 5 secs of led i disconnected it and took my voltmeter and connected it, then i rotatet potentiometer a little bit to see how stabvle and precise it is, and then siply started sparkling... around 25volts...

oh boy, mosfets are 0.5$ and shipping would be 10$, it will have to wait until i order something more so it would be worth it

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