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Original question:

TPS65987DDK: Device boot

TPS65987DDK: First turn on of Device

Ohad Fundoianu
Intellectual 340 points
Part Number: TPS65987DDK
Other Parts Discussed in Thread: TPS65987DJEVM, TPS65987

Tool/software:

Hi Chris, 

I'm now trying to make that device work and find issues. 

With what basic image file does the device come from manufacturing? 

With what VBUS voltage shall it wale ? Is it depends on the device connected to it through USB-C cable ?

Thanks, 

Ohad

  • 0
    TI__Mastermind 30435 points

    Hi Ohad,

    Ohad Fundoianu said:
    With what basic image file does the device come from manufacturing? 

    As mentioned before, it is not recommended to use the basic image file. You can generate a binary image to load the EERPOM using the 6.1.4 application gui that can be downloaded from the product page.

    Ohad Fundoianu said:
    With what VBUS voltage shall it wale ? Is it depends on the device connected to it through USB-C cable ?

    It depends on many things. These are the "basic images" default on the IC. As an example, if you choose Config 5, it can act as a 5-20V sink, and will sink voltage depending on what the connected far end USB-C source offers.

    If sourcing, it is limited to sourcing 5-V, assuming you have 5-V supplied to the PPHV path being used to source.

    As mentioned above, these configurations are not recommended for use.

    Thanks and Regards,

    Chris

  • 0 in reply to Christopher Lim1
    Intellectual 340 points

    Hello Chris, 

    No way it is limited to sourcing 5v !! It was written very clearly on datasheet that it can source up to 20v: 

  • 0 in reply to Ohad Fundoianu
    TI__Mastermind 30435 points

    Hi Ohad,

    Ohad Fundoianu said:
    With what basic image file does the device come from manufacturing? 

    As mentioned in the first response, with the "basic image files from manufacturing", you are limited to the configurations in table 8-7. These are not recommended, and are only limited to 5-V sourcing.

    The part is capable of 20-V sourcing, but not with the image straight from manufacturing.

    Christopher Lim1 said:
    As mentioned before, it is not recommended to use the basic image file. You can generate a binary image to load the EERPOM using the 6.1.4 application gui that can be downloaded from the product page.

    If you want 20-V sourcing, you need to use the 6.1.4 GUI to generate a fw image that must be loaded to the PD controller from an external source on boot. If you take the TPS65987DJEVM as an example, an external SPI flash is used to store said image.

    You can use the GUI to configure and generate the image, and then you need to find a way to load it to the SPI flash, typically with an EEPROM programmer or something similar. On boot, the TPS65987 checks for the SPI flash and will attempt to load the image if the flash is there.

    Thanks and Regards,

    Chris