The EVX2001-Y-00B Evaluation Board is mainly designed to demonstrate the capabilities of MPS highly integrated controller MPX2001. The MPX2001 is an all-in-one flyback controller aims at high-performance and high-integration solution. It combines the primary side driver, secondary side controller and synchronous rectifier (SR) driver in one chip. So the opto-coupler and TL431 can be removed from the secondary side and SR can be turned off on time without any shoot through risk.
The EVX2001-Y-00B is typically designed for a general adapter.