ADP1048 max output power?

Hi James

I use the ADP1048 To be a power module.target power is 6.4kw

Now, the ADP1048 only can Support 4kw capacity output.

When I select the CURRENT SENSE ADC to 500mv: the output rating:3000w

When I select the CURRENT SENSE ADC to 750mv: the output rating:4000w

Now setup          

  Shunt:10m ohm

  Max Power:8192w

  Does any reason to cause  output power limit ?

Thanks