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TPS6594-Q1: Questions about TPS6594-Q1 & TPS6593-Q1

Kenny Cheung
Prodigy 10 points
Part Number: TPS6594-Q1
Other Parts Discussed in Thread: TPS6593-Q1,

hello,

I am considering to use TPS6594-Q1 or TPS6593-Q1 in our products, but I have three questions about them.

  1. What are the differences between TPS6594-Q1 and TPS6593-Q1? I briefly took a look at their datasheet but I could not find the differences.
  2. I would like to program the NVM of TPS6594-Q1/TPS6593-Q1 after soldering them to the products. To prevent damage to other ICs on the board, I have to power up the PMIC but disable its power output before programming the correct configuration to the NVM. Can this be done?
  3. There are many device numbers (TPS65940400RWERQ1, TPS65941111RWERQ1, etc) shown in the datasheet. Where can I find the differences of them?

Regards,

Kenny

  • 0
    Prodigy 10 points

    one more question: if I deassert nPWRON or ENABLE pin, can I still access the I2C interface to program NVM?

  • 0 in reply to Kenny Cheung
    TI__Mastermind 25385 points
    Kenny Cheung said:
    What are the differences between TPS6594-Q1 and TPS6593-Q1? I briefly took a look at their datasheet but I could not find the differences.

    The biggest difference is TPS6594 ability to monitor the System Voltage and control an external safety FET. Compare section 8.3.1 of both data sheets and you will see how this is important for achieving ASIL-D. 

    Kenny Cheung said:
    I would like to program the NVM of TPS6594-Q1/TPS6593-Q1 after soldering them to the products. To prevent damage to other ICs on the board, I have to power up the PMIC but disable its power output before programming the correct configuration to the NVM. Can this be done?

    Yes, this can be done. If you know that you wish to program the NVM after soldering them to the product, using TPS65940400 or TPS65930400 is recommended. They come with a default PFSM that does not enable any of the rails. 

    Kenny Cheung said:
    There are many device numbers (TPS65940400RWERQ1, TPS65941111RWERQ1, etc) shown in the datasheet. Where can I find the differences of them?

    Besides the '0400 which has a "blank" PFSM, each of the released device numbers corelate to particular PDN powering an SoC. The documentation for this different use cases can be found on the landing page of the TPS6594. 

    Kenny Cheung said:
    one more question: if I deassert nPWRON or ENABLE pin, can I still access the I2C interface to program NVM

    Yes