I've incorporated a DRV8837 into my motor application. VM is supplied by a boost regulator that maintains an output of 7V.
When I drive the motor and then abruptly brake, I see the expected negative flyback current coming from the motor. I would also expect to see that same flyback current driven back to the boost output from the DRV8837 as well, but I do not. I only ever see positive current into the DRV8837.
What's going on under the hood here?