The chip is most probably a MOSFET transistor.

Isaac


Em 5/3/2013 20:21, lee@baudalign.com escreveu:
> One of my hobbies is RC helicopters, and I recently purchased the very
> nice Walkera SuperCP; a tiny little flybarless 6ch heli.  Anyway, all of
> the electronics (receiver, gyro, MCU, speed controller, etc) are all on
> one board, which costs almost as much as the heli to replace.  I'm trying
> to help someone else track down a chip which is used several times on the
> board, one of which has burnt-out (not sure if that's the only issue), in
> the hope that it might help save them money now, and possibly save me som=
e
> in the future.
> Cause of the failure was a battery with reversed polarity connector.
>
> The SMD chip in question has six legs (3 a side), and appears to be marke=
d
> as "52C45", but I turn up absolutely nothing in my searches.  Haven't bee=
n
> able to get a photo yet as my phone's macro wasn't up to the challenge;
> could try with my "proper" camera at a later stage if required.  Package
> is probably SOT-26, but mainly trying to determine what the chip is, what
> it does, and whether replacing it could fix the board.
>
> Has anyone got any thoughts on this, have better access to component list=
s
> than google, etc?  Maybe I'm reading the markings wrong, but they seemed
> relatively clear.
> Thanks
> Lee
>

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