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TPS650352-Q1: emulate UVP

Shoo Saga
Intellectual 2681 points
Part Number: TPS650352-Q1

Tool/software:

Hi Phil,

The UVP is mandatory function for the customer. I want UVD to operate it as UVP.

The transition to the Reset state could be the solution when UV is asserted?(UV_RST_EN=1, STATE TRANSTION= 0h)

Best,

Shoo

  • 0
    TI__Mastermind 48891 points

    Hi Shoo,

      Yes; the transition to the Reset state when UV is asserted when UV_RST_EN=1 and STATE TRANSTION= 0h; and to "WT_PWR_REC" state which is temporary state meaning "Waiting for Power Recycle" and quickly going to Off state  when UV_RST_EN=1 and STATE TRANSTION= 1h.

      Hope it's the solution to meet customer request. 

    Thanks!

    Phil

  • 0 in reply to Phil Yi
    TI__Intellectual 2681 points

    Hi Phil,

    I checked Fig6-7 datasheet but I don't understand the difference between the transition to WT_PWR_REC and the transition to RESET state.

    The difference is nRSTOUT output behaviour in case VSYS>VSYSUVLO?

    When transition to the WT_PWR_REC sate , It takes some time to recover the active state even if VSYS>VSYSUNLO?

     if VSYS<VSYSUVLO, It will move to OFF state in both states.

    Best,

    Shoo

  • 0 in reply to Shoo Saga
    TI__Mastermind 48891 points

    Hi Shoo,

      No; in RESET state, PMIC ewill power up normally into active state if no more fault condition.  WT_PWR_REC state is a temporary state meaning "Waiting for Power Recycle" and quickly going to Off state.

      From OFF state, PMIC needs the VSYS<VSYSUNLO-F and then manually make the VSYS>VSYSUNLO-R to power up into active state. 

      If VSYS<VSYSUVLO-F; the PMIC goes into Off state immediately from any state. 

    Thanks!

    Phil