• State
  • Locked Locked
  • Replies 5 replies
  • Subscribers 101 subscribers
  • Views 435 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.

dm8148 is heating

Alexander Vasiljev
Expert 1015 points

Hi.

We set dm8148BCYE0 and dm8148BCYE1 on our custom board. And they are heating. We worry about heating, because dm8148BCYE on the EVM is just warm.  We tested voltages on our board and they seems to be OK. And processors works on the same frequencies as on the EVM. We see two possibilities: or dm8148BCYE0/1 consume more power, or we have a deeper flaw on our board.

So i want to ask does dm8148BCYE0/1 really consume more power than dm8148BCYE on the same frequencies? Or what flaw on the board can lead dm8148 to heat?

Best regards,

Alexander Vasiljev.

  • 0
    Intellectual 540 points

    We've noticed similar heating in our custom board. It doesn't stop the board from running, but it is quite hot and it would be nice to see it cooler at idle. The power draw appears correct on our board, just like in your case.

    If you get any details from anyone about the higher temperature, I'd be interested in hearing about it.

  • 0 in reply to Brett Kuehner
    Genius 3055 points

    Our EVM has a dm8148BCYE, too, and the prototypes of our upcoming own board probably will have dm8148BCYE1. And we realized that in the meanwhile also dm8148BCYE2 became available.

    Please let us know if actually there is a difference concerning heating of these BT8148 versions.

    Thanks in advance,
    Joern.

  • 0
    Genius 3055 points

    Alexander,

    just to be sure: Did you consider the clock speeds?

    In principle, as far as I know, the CYE and CYE0 do not support a maximum of 1GHz clock speed, the CYE1 does. And the EVM with CYE is preset by u-boot as delivered with EZSDK 5.04.00.11 around 600  MHz, if I understand the configuration right.  However, might that be that on your custom boards the clock speed configuration is just higher (despite that this should not be done for CYE0) and that this is the reason for the advanced heating?

    Thanks in advance for your clarification,
    Joern.

  • 0 in reply to Joern
    Expert 1015 points

    Hi, Joern.

    We use 600 MHz speed. So it is not an issue.

    Thanks.

  • 0 in reply to Alexander Vasiljev
    Genius 3055 points

    Hi Alexander,

    thanks for the clarification.To be honest, I'd have been happier if this heating was caused by such a simple reason.

    So your and Brett's question remains open, and me too was extremely interested in a statement from TI concerning power consumption and heating of the several chip versions of DM8148CYE... just to be sure if we have to expect those effects, too.

    Kind regards,
    Joern.