Blown up vesc, any ideas of what i did wrong?

ESK8 Electronics
1

i used my vesc normally for about 1 week and next morning i turn it up and a spark comes out. any ideas of what went wrong?

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2

You’ve shorted the 5V and GND on the PPM input. If you got a spark, then separating the pins is a start, but it won’t work right until you replace the components that were damaged- and the damage surely isn’t limited to C33… The regulator is probably toast, and you might’ve burnt a trace or two. Check the schematics if you can and see what other components are connected to the 5V rails, and look them over, too.

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3

Looks like you blew C33. Yeah, definitely want those pins separated further, at all times. I believe that 5v comes from the buck converter in the DRV chip…

4

Uh oh. If the DRV is blown then it’s going to be allot harder to fix than just a 4 pin regulator. :o

5

Yes it is. You’ll need a hot air rework station to replace the DRV chip

6

Any advice on preventative measures to keep this from happening? Or is this question too tangential for this thread and if so i can delete it.

7

Use an empty plug (no wires crimped in) to cover the pins, so you cant accidentally press them together.

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8

Same. If I hadn’t left them covered by heat shrink previously this year, I would have put a “dummy” plug on my VESC’s pins. But now I use a GT2B, and so there’s a real connector on the pins now.

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