Could you please provide guidance on how to utilize separate GNDs with MAX14919?

Hi,

The GND and PGND pins should be connected to EP for MAX14919 to operate normally. They cannot be separated. 

If a COM ground is required in the system, we recommend connecting the PGND/GND of the MAX14919 to system COM via an external NMOS, so the system can be protected from reverse current. Refer to the diagram in datasheet page 17. Is this the reason that we need separate grounds?

Thanks,

Wei

Hi,

The GND and PGND pins should be connected to EP for MAX14919 to operate normally. They cannot be separated. 

If a COM ground is required in the system, we recommend connecting the PGND/GND of the MAX14919 to system COM via an external NMOS, so the system can be protected from reverse current. Refer to the diagram in datasheet page 17. Is this the reason that we need separate grounds?

Thanks,

Wei