ltc4357 high current issue

Hi,  Yes, you can use LTC4357 (or LTC4355 dual controller). You may need multiple parallel MOSFETs to limit power dissipation in each MOSFET. The load sharing will depend on copper trace and MOSFET resistances (aka droop sharing).

Thanks so much for your reply.

how can I determine the threshold voltage between these two batteries for switching between them?

I mean, want to have a circuit in which if a battery voltage equals 48V and the other equal 46 volts, the circuit continues the load sharing. that's important for me to share the current between two battery even if their voltage has a short difference.

Thanks

Thanks so much for your reply.

how can I determine the threshold voltage between these two batteries for switching between them?

I mean, want to have a circuit in which if a battery voltage equals 48V and the other equal 46 volts, the circuit continues the load sharing. that's important for me to share the current between two battery even if their voltage has a short difference.

Thanks

Ideal diode-OR, like a regular diode-OR, supplies current from the highest input voltage. The 48V battery will supply the entire load current till it discharges down to 46V and then the two batteries will droop share.