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TPS2553: TPS2553

Shlomo Perlshtein
Intellectual 290 points

Part Number: TPS2553

Hello.

Within the data sheet there are equations to calculte the min, nom and max I limit as a function of Rlimit.

When I used those equation for -as an examle - 49.9K resitor, I get the values:475,525 and 582mA.

BUT,in Table 7.5 Electrical Characteristics, there is a different values:

Please advise.

Shlomo Perlstein

  • 0
    TI__Expert 8980 points

    Hi, Shlomo Perlstein,

    Please use this equation to calculate:

    Regards,

    Bob

  • 0 in reply to Bob Ma
    Intellectual 290 points
    Dear Bob,
    Sorry, but I didn't understand your answer.
    In table 7.5 there is the following values for 49.9K : Imin=490mA, Inom=520ma and Imax=550mA(@25 degrees)/
    When I'm using the equations( that you also sent)- the results is: Imin=475mA, Inom=525mA and Imax=582mA.
    What I'm doing wrong?
  • 0 in reply to Shlomo Perlshtein
    TI__Expert 8980 points
    Hi, Shlomo Perlstein,

    Sorry for my misunderstanding, your calculation is correct.

    Yes, the equation is correct, but the value is theoretical value.
    The parameter in table 7.5 is from characterization data, it's actual value.

    The actual value is inside range of theoretical value, so it make sense and it's pretty good. It means our part have less variation than theoretical expectation. Don't worry about it.

    Feel free to ask if any more questions.

    Regards,
    Bob

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