• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 28 subscribers
  • Views 648 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.

DRV8885: DRV8885 RREF quesitons

Sheldon Cai
Intellectual 1290 points
Part Number: DRV8885

    I would like to know if   any recommended value of below components (R1,R2,C1,RREF) and the formula of PWM duty/Ifs, the PWM is 10K and would like to get the Ifs from 280mA to 400mA.

  • 0
    TI__Expert 4435 points

    Hi Sheldon,

    The formula to calculate I_fs is described in section 7.3.5 in datasheet. A more detailed explanation of I_fs adjustment can be found in this app note.

    The formula for the low pass filter would be:

    F = 1/ (2*pi*R_ref*C1)

    Depending on your chosen value for R_ref and your given frequency, you can solve for the capacitor value. I hope this helps. Thanks.