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AM5728: Thermal issue

satyanarayana P G64
Expert 1330 points

Part Number: AM5728

Hi,

Is there any AM5728 available for operating from -40C to 125C?

we have designed custom board with AM5728 Phytec SOM, the board has provision for capturing of three videos in which two has 1024x768 of resolution and one has 720x576 resolution.

we used TI EVM SDK for our application development. The custom consumes 28VDC@0.9A at root state and 28VDC@1.2A for processing of three videos (capturing, compression h.264 and streaming through ethernet at 100mbps).

My query is why it is consuming almost 30W when we pumping the power to custom board is 5VDC @75mA and 3.3VDC @3A.

The AM5728 SOC is heating up too fast junction temperature is 68C at 30C and 90C at 50 and thermal shutdown at 55C. Is there any way to resolve my issue.

We are compressing the data with H.264 compression default standard (2048kbps bitrate, high profile and level 40). To reduce the load on processor due to compression what are the changes and settings to be done.

Regards,

satya

  • 0
    Expert 1330 points

    Part Number: AM5728

    hi,

    we would like to know the thermal details of AM5728 SOC.

    What is the power consumption for full performance and minimal performance.

    In AM5728 among A15 cores, is there any automatic load exchange will happen or we have to share load manually.

    How to know the each core load weightage/percentage.

    How to optimize the SOC load and temperature through SDK.

    Regards,

    satya

  • 0 in reply to satyanarayana P G64
    TI__Mastermind 46460 points

    Satya,

    The processing a streaming video requires considerable MIPs and MFLOPs.  When used for this level of processing, the AM5728 will consume power that must be dissipated as heat.  A thermal solution such as adding a heatsink and possibly even forced airflow may be needed.  Your exact solution will be customized for the system design of your product.

    We provide multiple resources to help you manage your thermal design.  The first is a Power Estimation Tool.  You will need to model the maximum processing of your application.  This tool can then help you determine the maximum power consumed by that application at the maximum ambient temperature for your product.  You may need to make some current measurements on the supply rails during steady-state processing to help calibrate your estimates.

    AM572x Power Estimation Tool Application Report (SPRACA0):

    Once you know your maximum current consumption, you can then design your thermal solution.  The next two references provide understanding for power consumption and temperature rise for basic processing in the AM5728 and then a deeper understanding of the physics and tools for calculating the expected temperature rise and methods to managing this heat.

    AM572x Thermal Considerations Application Report (SPRAC53):

    Thermal Design Guide for DSP and ARM Application Processors Application Report (SPRABI3):

    Tom