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TPS65987D: 20V/5A condition in Table 7

Hirokazu Takahashi
Expert 8420 points

Part Number: TPS65987D

Hello Support team,

I couldn't find the condition for 20V/5A condition at Table 7 Device default conditions in P.42 datasheet.
Is it possible to set TPS65987D to 100W condition?

Best Regards,
Hirokazu Takahashi

  • 0
    TI__Genius 9630 points

    Hello Hirokazu-san,

    Table 7 lists the ROM default configurations of the device. You are correct that it does not have a 100W option. However, the TPS65987D requires that a RAM patch that can be either loaded from an EEPROM or EC. You can configure the device settings using the TPS6598x configuration tool and there you can choose a 100W option. 

    Regards,

    Emma

  • 0 in reply to Emma Hoying
    TI__Expert 8420 points

    Hello Emma-san

    Thanks for your prompt reply.
    What mean "EC"?
    Is it possible to config 100W by MCU?
    If possible, could you please let me know how to do it?

    May I ask how we can set 100W configration at the actual system instead of EVM and GUI?
    Is external EEPROM necessary for it?

    Best Regards,
    Hirokazu Takahashi

  • 0 in reply to Hirokazu Takahashi
    TI__Genius 9630 points

    Hello Hirokazu-san,

    EC = embedded controller, which is the same as an MCU. 

    We recommend using an external EEPROM unless this is a PC/notebook application, where an MCU is already available and can be used to program the system. 

    Regards,

    Emma

  • 0 in reply to Emma Hoying
    Prodigy 100 points

    Hallo , Hirokazu san ,Emma san

    I have a Question .

    I make to board consept is we use like a  AC adapter of PC.
    If possible, I would like to supply 100W to the PC without mounting a MCU on this board.

    If External EEPROM is required, is there a configuration that can write to external ROM from TPS65987D?

    Can TPS65987D  read EEPROM, if  Board don't have MCU?

  • 0 in reply to user5034648
    TI__Genius 9630 points

    Hello,

    Yes the firmware patch is stored in an external EEPROM. The PD controller communicates over the SPI data lines. You do not need an MCU if you have an external EEPROM.

    Regards,

    Emma 

  • 0 in reply to Emma Hoying
    Prodigy 100 points

    Hello, Emma san

    Thank you for your reply
    I understood that it is OK just to add EEPROM.

    I want to confirm about writing initial setting to EEPROM

    When writing to EEPROM, from Type-C for USB_PD
    Can you access it?
    ( Connect by  TPS65987D pin 51,54)
    Do We need to connect EEPROM from outside ?
    (For  exthample,  SPI signal line conntact to connector. etc.... ) 

    Would you  tell me the Boot setting pin condition when controlling from the external EEPROM.

    Would you Presend me  a reference circuit that sets USB_PD (source 100W) from an external EEPROM

    Best Regard ,

    Kudo,Shuji

  • 0 in reply to user5034648
    TI__Genius 9630 points

    Hello Kudo-san and Shuji-san,

    Please take a look at the TPS65987EVM. The TPS65987EVM User's Guide has a reference circuit which has the EEPROM connections you can model your design after. You will need to use pin's 36-39 for the SPI signals. The boot setting pin's are related to how you want your device to startup. Table 6 in the TPS65987D datasheet lists the different dead battery conditions. Check out that table and let me know if you have any questions.  

    Regards,

    Emma