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LM5160: definition of primary ripple current and peak current

Part Number: LM5160

Hi expert,

I'm using LM5160FBKQuickStartCalculator to design an isolated fly-buck. I would like to know the definition of primary ripple current and peak current in the Excel tool.

In the app note https://www.ti.com/lit/an/snva674c/snva674c.pdf , I saw below figure. Is the positive peak current in this figure the primary ripple current? And, is the negative peak current the primary peak current? In fact, I would like to know the values of positive and negative peak currents.

Thanks.