DC2844A/ LTM4680 two phase load current sharing

Could you give a specific number about the current imbalance between those 2 phases? According to the test data I have, the current difference between 2-phase is about 2~3A. So at no load condition, one phase current could be negative. That is possible, as long as the sum of 2 phases' current is about 0.

For 2-phase single output operation, we have to make sure the VOUT_COMMAND of each phase is the same. 

(1) Update the NVM to make it configured as single output

(2) Meanwhile, remove the following resistors: R93, R3, R28, R29, R30 and R31. Just leave them open.

Thanks for replying! I see about 2-3A on the demo board. However on the board I designed with four phase (2 modules), I see one module with 500mA and one modue with 2A (is it because of inductor tolerance?) . Is this module peak current or average current controlled? 2-3A imbalance can affect light load efficiency a lot. Is there a fix to this? 

Thanks for replying! I see about 2-3A on the demo board. However on the board I designed with four phase (2 modules), I see one module with 500mA and one modue with 2A (is it because of inductor tolerance?) . Is this module peak current or average current controlled? 2-3A imbalance can affect light load efficiency a lot. Is there a fix to this? 

For LTM4680, it is a peak current mode controlled module. As you mentioned, there is a part to part variation. Some parts can achieve very good current balance, and some parts have 2~3A current difference. DCR sensing is used inside the module. The DCR value varies from part to part as well. The variation of DCR value is a major contribution to the imbalance of 2-phase current. There is no fix to this 2~3A  current imbalance so far.