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UCC28070: Initial dynamic/transient load/pulse load response

Part Number: UCC28070

Hi, 

I'm looking for a technical guide in optimizing PFC Circuit/Boost converter response utilizing UCC28070. We have a design with 3 Phase 208Vac input and 350Vdc output with 6KW continuous load.

I can draw full power at static load regulated at 350Vdc, but having the 350Vdc output  dropping to 330Vdc during initial dynamic load or transient load of 0A to 5A at 50mSec pulse load. Does UCC28070 be able to respond to such transient load?