• Resolved

TPS25927: Overload Current Limit MIN and MAX value

Part Number: TPS25927

Hi Team,

On TPS25927x data sheet page 5, it indicates the MIN and MAX value of Overload Current Limit.

I would like to learn from you how we got the value of Overload Current Limit MIN and MAX value?

Thank you.

Tiffany Liu

  • Hi Tiffany Liu,

    The major factor which contributes to the Variation of Overload Current limit is the 'Offset of the Internal Amplifier' as highlighted in the block diagram below. That is the reason why the variation % increases at lower current limits.

    Generally, we test a certain number of samples from different lots , across temperature and see the variation of the parameter. Then we add some guard band and define Min and Max values. in Production, all the IC's are tested for that parameter and any IC which has that parameter out of Min, Max values are rejected. 

    Regards,

    Praveen

    ------------------------------------------------------------------------------------------------------------------------------

    Please click "This resolved my issue" button if this post answers your question.

    To find latest information on efuse and Hotswap, visit  www.ti.com/PowerSwitch

  • In reply to Praveen GD:

    Hi Tiffany Liu,

    Do you have any more questions ? If not, can we close this thread ?

    Regards,

    Praveen

    ------------------------------------------------------------------------------------------------------------------------------

    Please click "This resolved my issue" button if this post answers your question.

    To find latest information on efuse and Hotswap, visit  www.ti.com/PowerSwitch

  • In reply to Praveen GD:

    Hi Praveen,

    May we learn from you how to calculate the error of Overload Current Limit?

    Or no calculation but just based on data sheet Figure 20?

    Please advise. Thank you.

    Tiffany 

    Tiffany Liu

  • In reply to user4773196:

    Hi Tiffany,

    As mentioned earlier, the major cause of error is 'Offset voltage' of the internal amplifier and it varies with Process, Voltage and Temperature.
    It will be difficult to calculate the error based on so many variables.
    The best way would be to consider the Accuracy % data in Figure 20, as you mentioned.

    Regards,

    Praveen

    ------------------------------------------------------------------------------------------------------------------------------

    Please click "This resolved my issue" button if this post answers your question.

    To find latest information on efuse and Hotswap, visit  www.ti.com/PowerSwitch