I fried my VoCore

Endat
 
Posts: 44
Joined: Mon Feb 02, 2015 6:29 pm

I fried my VoCore

Sat Feb 07, 2015 11:55 pm

I was wiring the VoCore to power on a Raspberry Pi A+ with an external battery and mistook the 3v for a ground.. smoke, heat.. and now it's dead :oops:

I won't be able to do any more tests until I get another one.. maybe 5 weeks.

Endat
 
Posts: 44
Joined: Mon Feb 02, 2015 6:29 pm

Re: I fried my VoCore

Sun Feb 08, 2015 9:23 pm

I just ordered a couple more. Hopefully they can ship out before Chinese new year :)

Edit: I just found out that it's not totally ruined.. but I have lost the use of both 3.5v-6.0v inputs. I can still power it with a 3.7v battery.

For a smart guy, I can be pretty dumb sometimes.. :lol:

Image

Endat
 
Posts: 44
Joined: Mon Feb 02, 2015 6:29 pm

Re: I fried my VoCore

Tue Feb 24, 2015 8:13 pm

So I've tracked the problem down. I can still use the VoCore, powering it with a 3.7v cell phone battery, but whenever I try to power it using the 3.5-6.0v pins, the following circuit jumps to about 200 degrees immediately. You can even see a brown burn mark. If I replace this, maybe I will have full use of the unit again.. what is this circuit and how do I get one? I think it says "AS11Dh" or "AS110h"

Image

Is it a voltage regulator? I found these, but not sure if they would fit.

http://www.ti.com/product/lm2734
http://eastech.en.seekic.com/product/in ... X-3_6.html

Greenwire-Elektronik
 
Posts: 101
Joined: Thu Dec 04, 2014 6:31 am

Re: I fried my VoCore

Tue Feb 24, 2015 10:23 pm

It is a MT3410L according to schematics, layout and BOM. It seams that it is a part which will not be sold on the regular places apart from aliexpress.
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Ruphobia
 
Posts: 18
Joined: Fri Jan 30, 2015 4:07 pm

Re: I fried my VoCore

Thu Feb 26, 2015 3:54 pm

I took a quick look at digikey to see if there was a suitable replacement. There are some that are close but not quite there (by specifications). I hate it when people use parts that are unobtainium :(

Greenwire-Elektronik
 
Posts: 101
Joined: Thu Dec 04, 2014 6:31 am

Re: I fried my VoCore

Thu Feb 26, 2015 5:13 pm

If you list them i can check the datasheets and find a replacement!
Buy now - breakout board for VoCore to easy adapting your idea!

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Endat
 
Posts: 44
Joined: Mon Feb 02, 2015 6:29 pm

Re: I fried my VoCore

Sat Feb 28, 2015 3:03 pm

Image
Would it be possible to upgrade to one that has this overvoltage / temp protection?

charliex
 
Posts: 42
Joined: Sun Nov 16, 2014 5:34 pm
Location: los angeles

Re: I fried my VoCore

Sat Feb 28, 2015 4:53 pm

i didn't look too hard, but a quick scan i see lp3208, a7115

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