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Can I add DC-DC to generate 5V from PMP8920 based circuit of 12V output

Other Parts Discussed in Thread: PMP8920, TPS54427


I need to design industrial power supply with dual output as below.

5V, 4A

12V, 3A

I found PMP8920 reference design to get 12V output with 100W output so now i need to have 5V only.

Can i add DC-Dc to generate 5V as per requirement from this 12V DC?

Please advice me any cheaper solution than this if possible.