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TMS320F28379D: f28379d Controlcard ins not powering up

Vasu Mani
Prodigy 130 points
Part Number: TMS320F28379D

Hi,

We bought 2 controlcrds and it was working earlier.

Now it is not powering Up. Can u please support us to repair this.

Or else if u are giving support, we are ready to send to you.

Thanks 

vasu 

  • 0
    TI__Mastermind 42195 points

    Vasu,

    what were you doing with the controlCARD? Are you sure that you are still correctly powering the circuit?

    Working under the assumption that you have correctly configured and powered the controlCARD: It seems like it was working and that now it is not working. Hearing this information it is likely EOS or ESD which has damaged the controlCARD. With this failure mechanism typically it is the C2000 device which has been damaged and a high current draw can be seen on the 3.3V and sometimes the 1.2V power supplies.

    Occasionally the power regulator is damaged, but this is rare.

    If you would like to repair I would recommend you confirm what has failed and replace that component. Again as mentioned before this is likely the F28379D device, it is a BGA, but can be reworked in a standard lab environment with a sticker stencil, some solder paste and hot air.

    My recommendation is that this is likely not worth repairing and would recommend you to purchase another controlCARD.

    Regards,
    Cody 

  • 0 in reply to Cody Watkins
    Prodigy 130 points

    Cody,

    We are using this controlCARD for inverter control.

    I am sure it is correctly powered and we have one more controlCARD and that is working.

    3.3V is not coming and thanks for your information.

    If possible give some guidelines to check which is damaged.

    Thanks 

    vasu

  • 0 in reply to Vasu Mani
    TI__Mastermind 42195 points

    Where are you measuring 3.3V?

    If you cannot see 3.3V 1 of a few things is happening.

    1. The voltage regulation device is not receiving power 
      1. Check if 5V is available on the input pin. 
    2. the voltage regulation device has failed open and so 3.3
      1. 5V on input 0V on output
      2. Device not hot
    3. There is a strong short to ground on the 3.3V rail
      1. 5V(possibly sagging) on input to Vreg device, 0V on output
      2. Device Hot 

    Regards,
    Cody