Choose active EMI filter components
for sufficient attenuation using the following procedure.
- Refer to Active EMI Filter
for sensing and compensation components.
- Based on a selected
LIN of 0.68 µH and a required attenuation of 60 dB, use Equation 48 to calculate
CINJ. Choose a standard value for CINJ of 0.47 µF.
Equation 48. ![GUID-8EC93C1A-5541-446D-8E43-71F99E37E821-low.gif](/ods/images/JAJSJI4B/GUID-8EC93C1A-5541-446D-8E43-71F99E37E821-low.gif)
- To prevent the active EMI filter
from undamped resonance with the LIN inductor, use Equation 49 to select an
adequate RDAMP. Choose a standard value for RDAMP of 5.01
Ω.
Equation 49. ![GUID-83476F22-6D61-4436-9105-382F699F4D78-low.gif](/ods/images/JAJSJI4B/GUID-83476F22-6D61-4436-9105-382F699F4D78-low.gif)
Note: For 2.1-MHz designs
CDAMP is not required.