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TPS65220: How to extend the rise time between channels to 10 ms or more.

Shinichi Inoue
Guru 21701 points
Part Number: TPS65220
Other Parts Discussed in Thread: TPS65219

Tool/software:

Dear Specialists,

My customer is considering TPS65219 and TPS65220.

They have a question.

I would be grateful if you could advise?

---

The target SOC specifies that the rise between power supplies must be at least 10 ms.

On the other hand, POWER_UP_SLOT_DURATION_x can be set up to a maximum of 10 ms, I would like to extend it a little longer.

I would like to know how to make it longer than 10 ms.

For example, would it be possible to combine Slot1 (10 ms) and Slot2 (1.5 ms) for 11.5 ms?

---

I appreciate your great help in advance.

Best regards,

Shinichi

  • +1
    TI__Expert 6245 points

    Hi Shinichi,

    If i understand this correctly, it is not the rise time but the time duration between the rails coming up must be more than 10ms.

    Yes, you can configure dummy slots (no rail comes up in that slot) in between to add more time and configure rail to come up at the desired time. As you mentioned in the example, you can configure slot1 and slot2 and configure rail to come up in slot3 etc...

    Sathish

  • 0 in reply to Sathish Vallamkonda
    Guru 21701 points

    Hi Sathish,

    Thank you for your reply.

    Your understanding is correct. The question was about wanting the time between rails to be 10 ms or more.

    I understand that this can be achieved by setting up a dummy slot.

    In this case, there is no need to set the power supply channel for the dummy slot, just set the duration time.

    Is this understanding correct？

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi

  • +1 in reply to Shinichi Inoue
    TI__Expert 6245 points

    Hi Shinichi,

    That is correct, you don't assign a rail for that particular slot(s).

    Sathish

  • 0 in reply to Sathish Vallamkonda
    Guru 21701 points

    Hi Sathish,

    Thank you for your reply.

    I'll share this information with the customer.

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi