Carrier Power Inputs

How the 5V inputs on ARK carrier boards combine, and how much current they can supply.

Board	5V inputs	Combining
ARK Pixhawk Autopilot Bus Carrier	POWER1, POWER2 (6 A each), USB	Priority select
ARK Jetson PAB Carrier	POWER1–3 (6 A each)	Ideal-diode OR
ARK Jetson PAB Carrier V3	Power 1–3 (4 A each)	Ideal-diode OR
ARK Just A Jetson	5V IN (6 A), BAT IN through the onboard 5.2 V regulator	Ideal-diode OR
ARK VOXL2 RTK PAB Carrier	VBRICK1, VBRICK2 on POWER (6 A each)	Ideal-diode OR

Priority Select

The highest-priority valid input powers the board and the others are disconnected: POWER1 > POWER2 > USB. An input is valid between 3.81 V and 5.85 V. Inputs never share current, so the 5V load must stay within the rating of the selected input.

Ideal-Diode OR

Each input feeds the 5V bus through its own ideal diode, which blocks backfeed between inputs. There is no input priority.

• Two or more of the same ARK power module share the load, so the total 5V draw can exceed one input's rating. Keep each input within its own rating.

• Inputs at different voltages don't share: the highest-voltage input carries the load. The ARK PAB Power Module outputs 5.27 V and the ARK 12S PAB Power Module 5.2 V, so mixing them adds redundancy but not capacity.

• An input above 5.84 V is disconnected.