DRV8262: DRV8262

Hello, 

In DRV8262, it has current regulation feature which enable and disable transistors (PWM) when ITRIP level is reach as described in below figure. 

My application is brushed DC motor that uses single H-bridge with 100% duty cycle for each reverse and forward direction. 

Given that my bus voltage is 40V, I_trip level 5A ,  motor resistance R, motor inductance L, how should I calculate amount of time that I_out reaches back to the I_trip level?

In other words, how should I calaculate V_out on time? I understand t_off time can be configured with external resistor, but I wanted to know how long it "ON" time going to be. I wanted to calculate approximate power dissipation when it's hitting this mode. My application will at current limit level for quite a while (few seconds). I think it has to do with very basic calculation like V=L*di/dt but I feel that I am stuck somewhere or not understanding properly..

Eventually I want to calculate how much average current is going through the transistor while it's operating at current limit level. In order to do that, I want to know the duty cycle at which transistor is ON. It looks like frequency is variable when operating at current regulation mode? Any clarification/advice would be appreciated. Thanks 

Thanks