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Schematic problem - It gets hot and smells like burning (lemmy.ca)

submitted 2 months ago by [email protected] to c/[email protected]

8 comments fedilink hide all child comments

I've been messing around with circuits my entire life but this design was time sensitive and I've never done my own PCB designs before, so I hired someone to put this together. After getting some test boards, when I plug them in the charger chip gets very hot and smells like burning....

Circuit is just a simple li-ion usb charger and a switch. I've gone through the datasheet for the bq25302 more times than I can count and I'm missing something obvious here. Using it just for delivering power seems to work fine, the problem is only when charging.

I do see R6 + R7 off TS don't have the recommended 10k values, but I don't feel like that would cause what I'm seeing. This is being connected to a 21700 lipo.

Someone mind lending me their eyes please?

bq25302 datasheet - https://www.ti.com/lit/ds/symlink/bq25302.pdf

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[–] [email protected] 3 points 2 months ago (1 children)

It means the same thing. I would have just drawn a line since they are right next to each other.

[–] [email protected] 1 points 2 months ago

Thanks!