The current rating of the part cannot be extended by using an external mosfet.
The current is limited or set by resistance across the SETI pin. The resistance value should be chosen less than 6kohm…
The exposed pad on the MAX256 is intended as a thermal connection only. It cannot be used as the only ground connection and excessive shutdown current may be seen if it is used as the return current path…
Please see the table below for more information on the undervoltage (UV) specifications:
Min Typ Max
UV rising 0.536V 0.550V 0.564V
UV falling 0.492V 0.519V 0.546V
UV Hysteresis 0.019V 0.033V 0.…
You could apply a differential probe on the Isense resistor to measure current per phase. Then use the following equation to calculate output current per phase:
Iout = Vdiff/300ohm*Ki, where Ki = 100000…