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negative input to positive output P.S

Other Parts Discussed in Thread: LM5022, LM5020

Hi

I need to design a P.S, NON-ISOLATED as following:

vin= -40 to -60v

vout=5.8v/0.3A

constant frequency but higher than 250kHz (for filtering)

1. please advise

2. can I do it with the LM5022?

THANKS AND REGARDS