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LM5146-Q1: LM5146 MOSFET power dissipation worst case analysis

Part Number: LM5146-Q1
Other Parts Discussed in Thread: LM5146

Hello all

when I do a WCA with LM5146 ,I have some doubts about the datasheet :

the most important is about the MOSFET calculation formula :

  1. about the MOSFET calculation in LM5146 ,the MOSFET switching , Is the calculation formula correct ?
  2. If the formula is not correct, I can use follow formula to analysis the MOSFET power dissipation?   

Thanks