TIDA-00951: Need help to understand the it's control

Hello, 

I am studying Tida-00951 reference design, our company has bought it's hardware model and software as well.

I want to develop its Simulation in PLECS, but I am struggling in designing its control. As I understood it has 'Phase Shift Control' but not 180°.

I want to know if you can provide any support to design its simulation 'control' and suggest any reference research paper to understand its control.

Thanks in advance, have a nice day.

Kind Regards

Sanket Mehare