I intend to use this high side switch in a PWM application with a brushed 12V motor drawing 8A steady state max: https://www.nxp.com/docs/en/data-sheet/MC33981.pdf
The switch allows for a half bridge configuration, where an external low side MOSFET is placed across the load as show in the diagram below:
The document states the following:
I do not understand why decreased power dissipation is desirable in this application, other than for thermal reasons.
Using a diode, the energy stored in the inductive load would be dissipated more quickly when the high side is removed. I'm not sure how having residual current flowing through the inductor before the next on cycle of the PWM would affect the system, but I assumed it was not desirable.
So why, in this case, would a mosfet be a desirable substitute?