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TPS54560: Tj calculation formula using ψJT

Part Number: TPS54560

Hi all

Would you mind if we ask TPS54560?

Our customer would like to calculate Tj using  JT.
Is following calculation formula correct?
TJ = TCtop + ψJT*PD

θJCbot and ψJB are the same value, however JCtop[45.8℃/W] is far from JT.
So, we can't judge whether TJ = TCtop + ψJT*PD is correct or not.

Kind regards,

Hirotaka Matsumoto