Other Parts Discussed in Thread: CSD87381P
Dear Sirs
I'm using the CSD87381P as the switch for the LM5141-Q1 design. The Fsw will be 500KHz. What would be the recommended dithering frequency?
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Hi Dennis,
Recommended dithering frequency is close to the resolution bandwidth (RBW) of the measuring receiver as defined in the EMI specifications. This is 9-10kHz for emissions in the 150kHz to 30MHz range. Choose a DITH cap of 10nF for optimal EMI noise peak attenuation.
For more detail, see part 9 here: http://www.how2power.com/other/EMI_Guide.php
Also, please use the LM5141-Q1 quickstart calculator to assist with component selection: https://www.ti.com/tool/LM5141DESIGN-CALC
Regards,
Tim