I see power supply chips that use Rds_on current sensing -- has anyone done this in a home-rolled application?
This is idle thinking based on a rather extreme frustration: I'm an avid model airplane pilot, and none (read -- 0) of the available electronic speed controls for brushless motors do a good job of shutting down a motor in the event of a full-throttle crash into the ground.
Since you can do cycle-by-cycle current limiting in a power supply, it seems like you ought to be able to do so in an electronic speed control, even one that uses a minimum of parts.
So I'm sorta casually investigating methods on how one might accomplish this, and the Rds_on method appeals because it leaves three largish resistors off the table.