• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 99 subscribers
  • Views 423 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM1808 Power Consumption measure result

Shine Kao_G
Prodigy 100 points
Other Parts Discussed in Thread: AM1808

 

Hi,

Here is our measured data with 5V voltage, which is lots of different from your Power Consumption Summary file, please help it.

 

Test conditions

mA

normal mode

1330

sd card read 100MB

1378

usb read 100MB

1413

memory test 100MB

1405

sd card read 100MB +
usb read 100MB

1423

TCP/IP test with 1 client download 100MB data

1369

TCP/IP test with 10 client download 10MB data

1373

usb read 100MB data from ftp which is located at sd card

1436

normal mode without LCD

1215

normal mode without LCD, USB 2.0 and LAN

1088

normail mode without LCD, USB 2.0 , LAN and pheriphal board

415

  • 0
    TI__Mastermind 41665 points

    Shine Kao_G said:
    Here is our measured data with 5V voltage, which is lots of different from your Power Consumption Summary file, please help it.

    I assume you are taking these measurements on the EVM from the external power supply? Keep in mind that the AM18x power consumption documentation specifies the power for the AM1808 only, it does not take into account any of the surrounding hardware such as memory or the power supply efficiency, which can give a system power footprint that is dramatically higher than the power consumption of the device itself as you are seeing. The EVM is not designed to be particularly power efficient, rather it is meant to 'just work' as it is designed while the chip itself is still being validated.

  • 0
    TI__Expert 8785 points

    It is difficult for us to compare the power consumption spreadsheet with the 5V input because additional components may be powered off of the 5V rail, which will lead to a higher power consumption.

    If possible, can you provide current measurements for power rails that are feeding only to the AM1808?

    --Christina

  • 0
    Intellectual 310 points

    Hello Shine Kao_G

    If you are doing a low power design, you should be aware Logic PD released their new Wattson software for the AM1808 EVM which will help you see actual power consumption across all power rails on the CPU and SOM design.  The software will be able to help you see which power rails are consuming the most power and when they are switching on and off in your application.  It might help you debug the source of the power you are seeing.

    There is an adapter required to connect to the PC available from this website: http://createnewstuff.webs.com/breakoutboardwattson.htm

    The Logic PD software is available from here: http://www.logicpd.com/wattson

    -A