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.
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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.
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.