Hello everybody,
I am working in a circuit which need the use of the device TPS610851-Q, in order to size well my components I need to calculate the power switching of the internal MOSFET.
I found this formula in an application note from Texas Instrument : 
(see the attached file).
from this formula I have some missing data such as tr and ts QGate.
Would you please help me if you have any idea how to calculate the power switch .
Thanks in advance