How does the BTS6143D function/respond to Inverse current conditions?
Inverse current is described by a condition in the application where the output voltage (Vout) is temporarily higher than the supply voltage (Vbatt)---such a condition will cause a temporary current flow from Vout pin to Vbatt pin within the PROFET. Such a condition may be caused by:
-a load that may act as a generator such as a motor
-a load that may store energy such as a capacitive load which may cause an inverse condition during a supply voltage drop/drop out
The BTS6143D and associated family members may react/respond to the inverse current in different ways depending on the time duration of the inverse current. If the BTS6143D is in the ON state prior to and during the inverse condition AND if the inverse condition is sufficiently long, the device may turn OFF. Once the inverse condition is removed the BTS6143D can remain OFF for a certain "delay time". After this delay time the BTS6143D will turn back on automatically (given the IN pin is still pulled low for ON operation).
All details of the functionality/behavior of the BTS6143D and associated family members can be found in the Inverse operation behavior application note.