Identification help

[halldor89]

Hi

I've got an brushless esc (speed controller) that was plugged in with reverse polarity. Upon inspection I found a couple of chips that look toast.

Can anyone help me identify them, looks like the markings say AL P11 but I can't find anything (see attachments).

I also noticed some solder balls around the mosfets, what is that?

[halldor89]

Re: Identification help

Anyone?

[ben7]

Re: Identification help

UGH, wow, that is some nasty, cruddy solder job!

Those are probably schottky diodes but I had a look online and didn't find anything either

[budm]

Re: Identification help

Are those two diode connected in parallel? Is the Cathode (Banded side) connected to the incoming Positive input and the Anode connected to the Negative? They may be use as crowbar circuit protection in case the power input polarity was reversed.