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TPS25944x - About PGOOD behavior

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Guru 21045 points

Hi Team,

 

I understand that PGOOD is High if PGTH is more than 0.99V.

(I refer to the following contents.)


 

However, according to the Figure49 in datasheet, PGOOD is Low if PGTH is more than 0.99V.

I guess that Figure49 is a mistake.

Is my understanding correct?

 


 

 

Regards,

Kanemaru

  • 0
    TI__Guru** 105611 points
    Hi Kanemaru,

    Yes, you are correct. The Figure 49 needs correction and is under consideration for next revision.

    Thanks
    Rakesh
  • 0 in reply to Rakesh
    Guru 21045 points

    Hi Rakesh-san,

     

    Thank you for your response.

    I have two questions.

     

    [Q1]

    We would like to know the corrections of Figure49.

    I guess that "Inverter" is added.

    Is my understanding correct?


     

    [Q2]

    We would like to know the change timing of the datasheet.

    Could you please let us know it if you have any information?

     

    Regards,

    Kanemaru

  • 0 in reply to Hide
    TI__Guru** 105611 points
    Hi Kanemaru-san,

    [Q1]
    We would like to know the corrections of Figure49.
    I guess that "Inverter" is added.
    Is my understanding correct?

    [Rakesh] Your logical representation is correct. Thank you!

    [Q2]
    We would like to know the change timing of the datasheet.
    Could you please let us know it if you have any information?

    [Rakesh] We will revise the datasheet by end of this month


    Regards,
    Rakesh
  • 0 in reply to Rakesh
    Guru 21045 points

    Hi Rakesh-san,

    Thank you for the information.

    I understand. Thank you very much.

    Regards,

    Kanemaru

  • 0 in reply to Rakesh
    Prodigy 60 points

    Thanks. This is exactly the answer I'm looking for. My other question is the NAND gate (before the MOSFET controlling PGOOD) in Fig 48, which is for device 42A/L. Is the NAND gate missing in Fig 49 (for device 44A/L) or is it not supposed to be there?

  • 0 in reply to Nick Nguyen
    TI__Guru** 105611 points

    Hi Nick,

    Only logic inversion function is missing in Fig 49 as shown below

    Regards,

    Rakesh