PCB Review Request - Power Distribution Board for a Drone

[mila_dae23]

Hi everyone! I am part of an team designing autonomous drones. Although not expert circuit designers, we intend to make our custom power distribution board for a micro drone. I made the design in KiCad and would love to hear your thoughts on it!

The board is supposed to supply :

20A at 17.4V to a 4in1 ESC (powering 4 BLDC motors) max.
5.3V to flight controller at 2.5A max.
12V to video transmission system at 1A max.

Before buying the components, requesting a review of the work.

 PDBV2-D002SCH.pdf (898.8 kB - downloaded 5 times.)
 PDBV2-D002BRD.pdf (93.84 kB - downloaded 27 times.)

Image:

3D VIEW


TOP LEVEL AND BULK CAPACITOR


BUCK CONVERTERS


FRONT CU

INNER CU 2

INNER CU 1 AND BACK CU ARE GND POURS



For the prototype and testing stage I plan to run it at low currents and use 1oz copper on all four layers as it’s cheaper.

Some of the things that I am eager to have reviews on:

Buck converter layouts on front cu.
Current sensor layout on front cu.
Effectiveness of the 330uF electrolytic capacitor against hot plugging and motor disturbances.


The layup goes:

Front Cu : Sensors and Buck Converters, Battery and Ground
Inner Cu 1: Ground
Inner Cu 2: Sensors and Buck feedback, Battery and Ground
Back Cu: Ground

Thank you!