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IWR6843AOP: Maximize the power consumption

Expert 1115 points

Replies: 2

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Part Number: IWR6843AOP

Hi,

We are testing our AOP6843 PCB design and have to make sure the power supply is able to support the most power consumption case. As far as I know, the People Counting lab consumes much more power than the SDK mmwave demo. 

My question are :

1. Which parameters of the People Counting lab should I modify in order to maximize its power consumption?

2. Is there any other way of maximizing the power consumption?

3. Should I also make a cover case or a box for the device so that it can be tested in a heat increasing condition?

Cheers,

Tom 

  • Tom,

     1) Frame rate/refresh rate is the primary factor which governs the duty-cycle that determines the power consumption. 

    At higher frame rate higher power consumption would happen, However frame rates are calculated based on many parameters such as Chirp configuration, RF active period, processing time needed for signal processing operation, detection, tracking algorithms... Hence after all the considerations frame rates are choose. If you increase available time for above operation would be shorten and some cases it may not be possible to increase the frame rate beyond certain point due to above constrains.   

    2) Number of Tx, Rx, Sampling rates, Numbers of samples/chirp, inter chirp idle time, inter frame idle time all would contribute in deciding the power consumption. For the people counting application for desired performance target above parameters are carefully constructed, by varying these parameters power consumption numbers could be altered, however these parameters will have significant impact on the people counting application performance, as these parameters are carefully constructed to get optimal performance for this application.

    3)  Yes, cover case without much of ventilation could restrict the free air flow (preventing natural convection) for the heat transfer and could potentially elevate the temperature as well, but this depends on type of the material used for the cover case, size & design of the enclosure.

    Thanks and regards,

    CHETHAN KUMAR Y.B.

  • In reply to CHETHAN KUMAR Y.B.:

    Hi, CHETHAN KUMAR Y.B.

    Your explanation is such helpful, thanks!

    Cheers,

    Tom

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