• State Resolved
  • Locked Locked
  • Replies 2 replies
  • 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.

Max sum value of vout setting register on TPS51367

Kenji Itoh
Intellectual 420 points
Other Parts Discussed in Thread: TPS51367

Hi team members,

 Min sum value of Vout  setting register on TPS51367 can be found 67Kohm  on page 14 in data sheet.

Then, how much value is maximum  ? 

 

Best regards,

Kenji Ito

  • 0
    TI__Prodigy 500 points

    Hi Itoh-san,

    1. the outsourcing capability of REF is 300uA, that is why min sum resistor is 67Kohm

    2. refer to figure.31, REFIN is the input of an op-amp, ideally the input bias current of op-amp is 0, but actually it still draw some input bias current in <1uA (max) range, so suggested maximum resistor is no more than 10 times min, that is 670kohm, in order for proper op-amp input bias current

  • 0 in reply to Bill Lin
    Intellectual 420 points
    Hi Bill-san
    Thanks . I think so that this impedance is need considering input bias current.

    Regards, kenji Ito