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Original question:

IWR1642BOOST: Questions in fabricating our own version of the EVM board

IWR1642BOOST: Questions in fabricating our own version of the EVM board

Mary Raullette Solomo
Intellectual 600 points
Part Number: IWR1642BOOST

Hello,

Thanks for the information above.

We are thinking of ways on how we could bypass (or change) the power adapter requirement in our own board (or hack the IWR1642BOOST board just for development).

The IWR1642BOOST requires 5V-2.5A supply though actual current consumption is observed to be around 700 mA only. If we want to change the adapter requirement to 5V-2.1A or less, how do we do that? Also, how does the board knows if the 5V-2.5A power requirement is met? Is it in the PMIC configuration? If so, how do we reprogram the PMIC in order to meet lesser current requirement?

Thanks,

  • 0
    Intellectual 600 points

    Can anybody please answer my queries?

  • 0 in reply to Mary Raullette Solomo
    TI__Mastermind 33805 points
    Hi,

    There is no dedicated check to make sure the 5V 2.5A requirement is met, this is a recommendation to ensure the power needs of the board and application is met. Providing less power than needed will prevent the board / application from running properly.

    As mentioned in the previous post you can estimate the power consumption for your application and ensure the power supply meets that requirement. Please note that depending on the application, various stages during runtime has varying current peaks.

    Regard,
    Charles O
  • 0 in reply to Charles Oladimeji
    Intellectual 600 points

    Hello

    Thanks for the information above. I asked this because we tried using 5V - 2.1A power adapter and the system failed to power up (NRST LED remained turned off). However, the power consumption estimation for IWR1642BOOST according to the tool is only 1.66W. So, does this mean at one point >2.1A was drawn? At which stage (runtime, power on sequence, etc) are we likely to expect large current peaks?

    In my observation when using the correct 5V - 2.5A power adapter, the current was around 270mA (pre-CLI config) initially and then increased to around 700mA once the configuration is sent and people counting demo is running. Nowhere did I notice current increasing more than 700mA. That is why I don't get why 5V - 2.1A power adapter isn't enough. Any insights on this?

  • 0 in reply to Mary Raullette Solomo
    TI__Mastermind 33805 points
    Hi,

    Are you certain this new adapter is capable of handling the current transients?

    Regards,
    Charles O
  • 0 in reply to Charles Oladimeji
    Intellectual 600 points

    Hello,

    I'd like to close this query. I have tried to use a different adapter (5V - 1.4A) and it worked perfectly with the EVM just drawing 700mA. The previous adapter (5V - 2.1A) that I used might be just faulty.