• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 256 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

LM5088-Q1: about feedback resistors selection

Paul Kim
Intellectual 1430 points
Part Number: LM5088-Q1


Hi Team

D/S says the bottom feedabck resistor(Rfb1) sould be selected by the current through the resistor (1.2V/Rfb1) is in between 1mA and 100uA.

my question is ..

[1] why we set Max 1mA ?

[2] why we set Min 100uA ?

  • 0
    TI__Guru* 75962 points

    Hi Paul,

    These are rule-of-thumb guidelines. The max of 1mA just limits the power dissipation and loading effect of the feedback resistors. The min of 100uA is to avoid high value feedback resistors that may be susceptible to noise due to high impedance.

    Regards,

    Tim