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TPS65987D: Configuration of 5A sink capability

Fan Wu
Intellectual 705 points
Part Number: TPS65987D

Hi TI,

I read the datasheet of TPS65987D. And have several questions as below.

1. What is the relationship between CC advertisement and configuration mentioned in Table7? For example, if I chose configuration 1 which  set chip is DFP mode. But if another end I connect to a UFP, will device change the configuration after CC advertisement?

2.The datasheet says it can go up to 5A sink current. But there is no such a configuration in datasheet. Table7 on page 41 only support 3A sink current. Any other customized configuration can be supported?

3.Is the configuration of Table 7 saved in the chip or external SPI Flash? 

4.If SPI flash can support more configuration, how can it be loaded to TPS65987D?

Our application needs to be a UFP, maximum power consumption will be around 20W.

Thanks!

cheers

Fan

  • 0
    TI__Expert 4455 points
    Hi Fan,

    Have you seen the "TPS6598x configuration tool" listed under Tools and Software in the product folder?

    This tool enables updating the part via Firmware patches and allows these patches to be customized for product specific operation. This tool also supports debug operating via I2C.

    1. This table shows default operating modes if no patch is found in flash or loaded to the device. I recommend always operating the device with a patch.

    2. 5A Sink is fine. You can configure sink PDOs using the TPS6598x configuration tool. This is another reason never to operate without a customized and up to date patch.

    3. This table is not however a much more complete set of customization options will be saved to flash after setting them in the Tool.

    4. I think the device will make more sense after using the Configuration Tool. Take a look and come back if there are still questions.

    Regards,
    Scott
  • 0 in reply to Scott T
    Intellectual 705 points
    Hi Scott,

    Thanks. If I want to use patch. How can I set ADCIN1? Our system does not have battery inside. So I guess I should choose SPI_MISO =1 and ADCIN1=0.6-1V. Right? What does safe configuration mean? Is it the configuration stored in external SPI Flash?

    cheers
    Fan
  • 0 in reply to Fan Wu
    TI__Expert 4455 points
    Hi Fan,

    Settings controlled by ACDIN1 and SPI_MISO will take effect if the device fails to load a configuration and patch update. A safe_configuration refers to device configuration and operation if there is a patch update failure. That would mean the device cannot load the patch from SPI flash and no EC is present to load a patch using I2C.

    The Application Configuration tool adds customization information to a firmware patch update. Customization might include Type-C state machine type (DRP, UFP...) or Source or SINK PDO tables. The firmware patch update will modify device operation to fix found issues or add new features.

    Regards,
    Scott