In the EVM's user guide, there is a pi filter design below. we're wondering to know how to pick the R/C values and design the pi filter to pass the CISPR EMI conditions. It would be good if you could share the calculation process. thanks.
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In the EVM's user guide, there is a pi filter design below. we're wondering to know how to pick the R/C values and design the pi filter to pass the CISPR EMI conditions. It would be good if you could share the calculation process. thanks.
Hi,
With the existing LMQ61460EVM PCB layout and EMI filter design, the application should pass CISPR 25 as shown in the EMI results in the datasheet (Figure 10-46 and Figure 10-54).
For specifics on how to select R/C damping values, please refer to the following app note (Section 4.4 damping capacitor).
Regards,
Jimmy