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UCC2808-2: Questions on inductors

Errol Leon6
Expert 5850 points
Part Number: UCC2808-2

Hello Team,

My customer is trying to generate 54V from 12V (boost basically). He used the TI Power bench tool and it gave him the attached design. He is trying to make the custom inductors, T1 and T2, and has a couple of questions below.

On T1, do we need 65uH on both PRI windings in series?
Or 65uH per PRI winding?
54V TI Power.pdf

Thank you in advance for the support!

Errol

  • 0
    TI__Expert 6080 points

    Hello, 

    The total primary inductance should be 65uH which would appear across both the turns in primary. 

    If they are using 2 turns in primary then they need to use a core with an AL value of: Lpri/Turns^2 = 65/4 =16.25

    Regards,

    Sonal