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IWR6843AOPEVM: 6843 AOP: Power Management

Patrick Groth
Prodigy 20 points
Part Number: IWR6843AOPEVM
Other Parts Discussed in Thread: MMWAVEICBOOST

Hello,

I have been testing around with the sensor for quite a bit now and I'm really happy about the results so far. 
The I'm running the standard Pointcloud-Demo at the moment and have set the sensor to 5fps.
This results in a cpu workload of 12%. When running with the MMWAVEICBOOST board it consumes around 2.5W.

I noticed that increasing the framerate and thereby the cpu workload, only has little to no effect.
Especially, when activating the static clutter removal, thus increasing cpu workload, it has no impact on power consumption. 

My assumption was that while the framerate makes little impact in power consumption, the CPU is responsible for most of the power consumed and is probably running at full speed at all times.

Can you confirm this? 
If it is true, can you tell me if and how it is possible to reduce the power consumed by the CPU?

Kindest regards,
Patrick

  • Former Member
    0 Former Member

    Hello Patrick,

    This is not entirely correct. The majority of the power consumption for this device is the RF side from the chirping. If you increased the frame rate so that there was significantly more chirping you should have seen an increase related to that. Without knowing your specific configuration 2.5W is around the upper end of power consumption. Depending on the duty cycle of the chirp and frame rate we've seen some applications be in the 1-1.5W range.

    Have you seen this training video? It will give you an understanding of power optimization options and tradeoffs: https://training.ti.com/mmwave-awr1x-power-optimization-options?context=1128486-1139154-1135823

    Is there a target power consumption you are trying to achieve?

    Amanda