Speedfit Synchronous FET Current in Boost Converter

MattO

Good afternoon, I have been looking at the speedfit DCDC application of the synchronous boost converter. The device currents graph does look quite right.

This is using a duty of 0.75, and as you would expect the current rises in the primary device unitl it turns off at which point i would expect all of that current to then be conducted in the synchronous diode into the capacitor, however as can be seen form the plot below the red trace doesn't have the same current, but much smaller.

Can someone explain what is going on here, is the red trace as i would expect as the current in both the FET and diode?

Thanks

Currents.png