• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 335 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

Original question:

TPS546D24A: How do you translate resistor dividers into resistor codes?

TPS546D24A: how to decide Vmax and Vmin through Table 13

Jerry Chen
Expert 5110 points
Part Number: TPS546D24A

Hi team,

Rtop is 40200  and Rbot is 12100 for VSEL. The R2G code is Code 5 and devider code is Code 1 in Table 17. How to find the Vmax and Vmin in Table 13? I saw the title of Table 13 is Resistor to AGND code, but in the table, it shows Resister divider code.

Thanks.

  • 0
    TI__Mastermind 48200 points

     

    Sorry for the confusion of the title.  The left most column of Table 13 is correctly labeled as "Divider Code" which, in your design case, is 1 and selects a VOUT_MIN value of 0.5 and VOUT_MAX value of 1.5.

    For all VOUT values up to 1.19V, plus the Rtop "one" option for 1.2V, VOUT_MIN = 0.5V and VOUT_MAX = 1.5V

    For all VOUT values from 1.2V to 2.38V programmed with a resistor divider, VOUT_MIN = 1V and VOUT_MAX = 3V

    For all VOUT values above 2.4V, VOUT_MIN = 2V and VOUT_MAX = 6V

    For Pin Programming options, when VOUT_SCALE_LOOP = 0.5, VOUT_MIN = 0.5 and VOUT_MAX = 1.5

    when VOUT_SCALE_LOOP = 0.25, VOUT_MIN = 1 and VOUT_MAX = 3

    when VOUT_SCALE_LOOP = 0.125, VOUT_MIN = 2 and VOUT_MAX = 6

    VOUT_MIN and VOUT_MAX can be adjusted through PMBus programming and stored to NVM via PMBus one the TPS546D24A has powered up.  To restore VOUT_COMMAND, VOUT_MIN and VOUT_MAX from NVM, make sure to set the VOUT bit in PIN_DETECT_OVERRIDE = 0b