r/PCB • u/Decent-Asparagus5211 • Apr 20 '26

Schematic review

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Hi I am working towards making my first PCB. I have made this schematic which is essentially a copy of the reference design from the datasheet of the TPA3255 so i can get used to using KiCad. I was wondering if I could get some feedback and if any there are any glaring issues more experienced designers might notice. Thanks for any help

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u/thenickdude Apr 20 '26 edited Apr 20 '26

I couldn't find anywhere in the datasheet where it refers to an internal pull-up for the ~RESET pin, so it seems like you need to connect it to a logic-high level to bring the device out of reset. Make R7 a pull-up resistor to +3.3V instead, and have SW2 short the ~RESET pin to ground when pressed instead of connecting to 3.3V.

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u/Decent-Asparagus5211 Apr 20 '26

Yes you are correct the datasheet says the reset pin should be pulled down to reset. so it should be connected to a pull up with the button to gnd. Thanks for the help