Fix Motor Drivers Bulk Capacitor Values (Rev.12 Branch)

opulo-inc / feeder

Source for LumenPnP Feeders

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Fix Motor Drivers Bulk Capacitor Values (Rev.12 Branch) #29

Closed FL140 closed 1 year ago

FL140 commented 1 year ago

Version Number

mobo Rev.12 Branch 20.05.2023 ~01:00 UTC

Bugfix or Enhancement

Bugfix

Description

It looks like placeholders (100nF) have been used for the motor driver bulk capacitors.

Suggested Solution

Replace the capacitors C18 & C20 with a reasonable size. Probably something in the range of 22uF.

sphawes commented 1 year ago

Hi @FL140! Thanks for the note! These values are not placeholders, they're following the recommended values from the DRV8837 datasheet:

I don't think they're intended to act as bulk capacitors. We have a 470uF cap on the 10v rail that provides bulk capacitance for the VM pin on the drivers.

Also, in an effort to not have duplicate issues, I'm going to close this issue and we can use this issue to sort out cap values.