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TPS659037: About OFF request command of TPS6590378

Gk 110
Expert 2440 points
Part Number: TPS659037

Hello to whom it may concern,

 

I'd like to know how is the behavior when TPS6590378 has been like a below situation.

 

(Situation)

 When TPS6590378 is OFF2ACT phase and if OFF request was done, how does it work?

 For example execute the ACT2OFF sequence immediately, or after executing OFF 2 ACT once, shift to the ACT 2 OFFS sequence, etc

 

We are concerned about becoming abnormal behavior.

 

Could you please give me any information?

 

Best regards,

 

Gk110

 

  • 0
    TI__Genius 16030 points
    Hello GK110,

    All new requests are ignored during a power sequence. So this means an OFF request during an OFF2ACT sequence will be ignored, and the power sequence will continue. If the OFF request is still present once the OFF2ACT sequence is completed, then the ACT2OFF sequence will immediately start.

    The only exception to this is VSYS_LO. When VCC1 < VSYS_LO, all outputs will immediately shut off, even if the device is in the middle of an OFF2ACT or ACT2OFF sequence.

    Regards,
    Karl
  • 0 in reply to Karl Wallinger
    Guru 19671 points

    Hi Karl,

    I'm a colleage of GK110, I respond insted of him.

    We send your answer to the customer, I think he could understand.

    Also he has an additional question, could you please advise.

    Is it ignored the same as this time?

    ---

    If OFF request is entered during ON request, will it be able to start normally the next time?

    ---

    I appreciate your great help.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    TI__Genius 16030 points
    Hi Shinichi,

    Yes, it is the same for both power-up and power-down sequences. During the OFF2ACT sequence, an OFF request will be ignored. After the OFF2ACT sequence completes, if the OFF request is still present, the device will shut off. After the device is off, any ON request will enable the device again.

    If an OFF request and ON request are both present at the same time, the OFF request has priority, so the device will turn off. Then the device will turn back on if there are no ON request gating conditions, and there is at least one ON request.

    Regards,
    Karl
  • 0 in reply to Karl Wallinger
    Guru 19671 points

    Hi Karl,

    Thank you for your reply.

    I'll share your information witih the customer.

    I appreciate your great help.

    Best regards,

    Shinichi