DroneCore.Pilot-Power-supply.md

Power supply diagram

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DroneCore.Pilot power consumption

Default system configuration consists of DroneCore.Pilot board connected with the Cube Orange and NVIDIA® Jetson Xavier™ NX Module. Power consumption of the whole system depends on usage of Jetson Xavier™ NX computing power and peripheral devices connected to board. This paragraph assumes that NVIDIA® Jetson Xavier™ NX is in 20W power mode and no other peripheral is connected to board, except one imx477 CSI camera. Video stream processing is the situation where 20W power mode starts to play a role. We describe some default test scenarios for reference, which you can use to calculate approximate value of power consumption of your whole system.

• Scenario 1:
  • Xavier NX statistics:
  • NVIDIA® Jetson Xavier™ NX: booted, with no user code running
  • Cube Orange: off
  • imx477: off
  • power consumption 3,4W

 

• Scenario 2:
  • Xavier NX statistics: (same as in situation 1)
  • NVIDIA® Jetson Xavier™ NX: booted, with no user code running
  • Cube Orange: on
  • imx477: off
  • power consumption 4,6W

 

• Scenario 3:
  • Xavier NX statistics:
  • NVIDIA® Jetson Xavier™ NX: CPU stress test, GPU stress test, 4k,30fps stream from camera
  • Cube Orange: running
  • imx477: streaming
  • power consumption 21,1W

 

5V DC/DC specification

As you can see in the "Power supply diagram", DroneCore.Pilot board contains 5V DC/DC converter, which can be supplied directly from drone battery (VDD_MAIN). It is highly recommended to use fan to ensure sufficient air flow through drone body, if sum of power consumption of DroneCore.Pilot with all connected peripherals exceeds 25W.

• Electrical characteristics
  • input voltage range: 6,5V - 30V
  • maximum current output: 12A (20 seconds peak)
  • sustainable maximum current: 8A (with proper cooling)
• Thermal characteristics
  • maximum temperature 150 degrees

Thermal measurement 1:

• measured at:
  • total 25W power consumption of whole system
  • room temperature (21 deg)
  • steady state after 10 minutes, without active cooling
• temperature was culminating at approx 60degrees after 10 minutes

Thermal measurement 2:

• measured at:
  • total 40W power consumption of whole system
  • room temperature (21 deg)
  • steady state after 10 minutes, without active cooling
• temperature was culminating at approx 90degrees after 10 minutes