TCAN1042GV-Q1: max. power dissipation

Jon,

I've written out an FAQ on CAN power consumption that can be found here. This goes into detail of how to calculate CAN power dissipation, and even uses the TCAN1042 as an example at the end in a 50% recessive/50% dominant case. The maximum power dissipation is application specific, so when you know the amount of time the bus is in recessive vs. dominant state, the maximum power dissipation for that case will be known. 

The absolute maximum power in any case would be a constantly dominant bus, but this isn't realistic for any application. So a bus that is dominant much more often than it is recessive would be the worst-case scenario in terms of high power consumption.

Regards,