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UCC28951-Q1: Max duty cycle determination in UCC28951-Q1

Part Number: UCC28951-Q1
Other Parts Discussed in Thread: UCC28951

Hi all,
I am trying to find the transformer turn ratio (section 8.2.2.2, page 37). In this example, (Max Duty cycle) Dmax is 70%, but the specification of controller (page 5) shows Dmax as 95% at Fsw=100kHz.

Does the Dmax changes according to the application (like the one in the above example)? If yes, how to calculate that?