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PMP4478: Mosfet collector

Part Number: PMP4478

Hello again,

we have a related question.

We changed the Mosfet from your schematics to  PN: STL11N65M5 with a RDSon of 0.47R. We want to ask if we need to change the R4 and R5 values.

Second question is , do you advise to use a ferrite bead before the R4 (and maybe R5) to reduce the EMI...will it adversely impact the design ? (assuming that Rdc of ferrite bead is almost nill).

thank you.