Other Parts Discussed in Thread: TPS23753
Hello,
I recently developed a prototype that convert a POE input to a 5V, based on the Eval board schematics. Even if the output voltage seems to be OK, I have some doubts on the switching frequency of the MOS.
I used a 38kohms resistor on FRS pin, but I measured that the maximumum frequency can be 2.55MHz, is it normal ? I guess we may have EMC issues at this frequency...
Note that I see another period at 340kHz.
The attached capture shows the gate voltage (Cian), the blue is the drain voltage. The top of the windows shows the unzoomed traces (to see the lower period).
Best regards,
Théo