Tool/software: WEBENCH® Design Tools
Hello David Baba,
1) Here is the wave form for Switch node with respect to GND of the device at 48V Vin.
2) The voltage swings at the switch node is 0 to 48V for 48V Vin.
3) Switching frequency is 213KHz.
I hope this will clear you.
Please reply,
Thank You.