This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • Resolved

TPS542941: About VIN shutdown current

Guru 18780 points

Replies: 9

Views: 568

Part Number: TPS542941

Hi Team,

 

Our customer measured VIN1 and VIN2 shutdown current at VIN1=VIN2=12V, EN1=EN2=LOW.

Then, VIN1 current is around 110uA and VIN2 current is around 0uA.

So, VIN current is inclined to VIN1 pin.

Is this correct behavior?

 

If yes, could you please let us know this cause?

 

Regards,

Kanemaru

  • Hi,

    Please refer dagtasheet page 6, as below:

    VREG5 (internal circuit power supply) is from VIN1.

    Dataheet page 3, EC table, VIN shutdown current, max 150uA, so your test result is reasonable.

    Jason Wang

    APP/BSR/MV

  • Guru 18780 points

    In reply to Jason Wang (BSR-MV):

    Hi Jason-san,

    Thank you for your prompt reply.

    I understand. Thank you very much.

    Regards,

    Kanemaru

  • Guru 18780 points

    In reply to Hide:

    Hi Jason-san,

     

    I have one more question.

    Our customer separate VIN1 (So VIN1=Open and VIN2=12V) at shutdown.

    Because, they would like to reduce shutdown current.

    Do you have any problems with this usage?

     

    Regards,

    Kanemaru

  • In reply to Hide:

    Kanemaru,
    I think the structure is acceptable and no problem.
    But, please send email to SamZhang for EVM test confirm. sam.zhang@ti.com

    Jason Wang

    APP/BSR/MV

  • Guru 18780 points

    In reply to Jason Wang (BSR-MV):

    Hi Jason-san,

    Thank you for your prompt reply.

    I send e-mail to Sam Zhang-san.

    I’d greatly appreciate your verification.

    Regards,

    Kanemaru

  • Guru 18780 points

    In reply to Hide:

    Hi Jason-san,

    I received automatic replay from Zhang-san.

    Could you plaease let us know your address?

    Regards,

    Kanemaru

  • In reply to Hide:

    Hi,
    Hao will give you feedback today.

    Jason Wang

    APP/BSR/MV

  • In reply to Hide:

    Hi Kanemaru,

    I've checked your application on EVM. There is no issue.

    When VIN1=0, VIN2=7.2V, EN1=EN2=0, there is no voltage on either output, nor the other VIN.

    Regards,

    Sam

  • Guru 18780 points

    In reply to Sam(MPAA) Zhang:

    Hi Sam-san,

    Thank you for the information.

    I understand. Thank you very much.

    Regards,

    Kanemaru

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.