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TPS92692: TPS92692 dimming Contrast Ratio

Johnsin Tao
Intellectual 1625 points
Part Number: TPS92692


HI  engineers:  

       About the TPS92692  dimming  Contrast Ratio,   How do  I  calculate dimming contrast 15:1 , or can  you Provide the formula？

      Thank  you.  

      Johnsin  Tao

  • 0
    TI__Mastermind 18890 points

    Johnsin,

    I assume you are asking about the analog dimming ratio of 15:1 from IADJ.  It's just the ratio of the highest command DC current from IADJ to the lowest current from IADJ command.  For example, if the max current command with IADJ of 2.25V is 1A then the minimum current that you will be able to 1/15 = 66.67A.

    Thanks Tuan