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I'm building a small Eurorack switching PSU using DC-DC converter modules, and before pulling the trigger on the PCB I'd love to have someone sanity check the board.

The schematic is pretty straightforward; I pretty much followed the datasheets for both the RDDW60F-12 and SKM10B-05, adding a handful of LEDs to monitor power on each rail, and inputs/outputs for power and an external (daisy chainable) switch to enable/disable the DC-DC converters.

Schematic

This is what the PCB looks like: bottom layer is a ground plane, and the top layer has a ground fill everywhere where aren't traces, connected to the bottom ground plane using via stitching.

I'm not entirely sure if it's useful (saw this being used on the Befaco PCBs), but I cut out some slots under the converters to help with cooling.

What am I missing? Doing anything wrong? Feedback greatly appreciated!

PCB

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  • \$\begingroup\$ Welcome! Seems resonable. Are there any requirements on input and output capacitors for the DC/DC modules? Any particular reason for THT resistors and LEDs? \$\endgroup\$
    – winny
    Commented Aug 16, 2022 at 8:26

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You may be able to get by with two layers, four layers is probably not needed with the cross sectional area of copper with the current levels (~3 amps) that you have.

Other than that you might want to run some resistance/heating calculations on those traces outputs from the DC to DC converters. I don't know how much current they're carrying but if they're carrying more than 3 amps you could probably expand their size a little bit or a lot. Usually on power traces I run power planes or fills if I can instead of traces, it usually doesn't cost anything and if you have the space, use it.

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