ltc4357 high current issue

Question

Hi, we work on a robotics system with two 48v Battery. I want to design a board in order to switch between two batteries with a load sharing system. 
 we need a circuit with a max 40A pike. I found LTC4357 for this work. but, can I use a high current Mosfet in this circuit for achieving more current? Thanks

PSachdev · Accepted Answer

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).)

PSachdev · Answer

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.

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ltc4357 high current issue