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LM5021: power supply of LM5021

Part Number: LM5021

Whether the power supply of LM5021 can only be taken from the primary side of the transformer?

Is it possible Vin to take power from the secondary side?

What will happen if the LM5021 takes power from the secondary side?

  • Hi Luke,

    If you take the power directly, you would be violating the isolation barrier. Powering from the aux winding is typically the cheapest and most efficient way to power the IC. 

    I hope this answers your question.