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Device recommendation for 130V, 900W boost circuit

Matt Calvo
Genius 14755 points

Part Number: 

Tool/software:

Hey Boost Regulator Team,

I have a customer evaluating our Boost Regulator portfolio for a new project and we were hoping you could help to provide some guidance from your perspective on which device would be most suitable for 12.8V input 130V output @ 6A (~900W) with isolated feedback

At the moment we are considering the LM34966-Q1 and LM5155. Can you please help to provide feedback in terms of which device from your portfolio would be best suited for this application? Please let us know if there's any tradeoffs to take into consideration or if you need any further information. 

-Matt

  • 0
    TI__Genius 16015 points

    Hi Matt,

    Thanks for reaching out.

    The only isolated topology that is possible with these devices is flyback. However the power you need is too high for a flyback.

    I think another topology like fullbridge topology might work for you.

    I will assign this thread to the responsible product line for these devices.

    Best regards

    Moritz

  • 0 in reply to Moritz
    TI__Genius 14755 points

    Thanks for the update Moritz!

    Looking forward to receiving feedback from the High Voltage Controllers team!

    -Matt

  • 0 in reply to Matt Calvo
    TI__Genius 11350 points

    Hi Matt, Ning responded to you via email, so I'm going to close this thread.

    Copying Ning's response here:

    If the Vin and Vout is fixed, I’d recommend to use bridge solution like LLC. Given the 130V Vout and 6A Iout, I’d recommend full bridge on the secondary side.

    Since the Vin is just 13V, you can use UCC25600 as the LLC controller. You can use either full bridge with diodes or half bridge with 400V FETs on the secondary side.

    Here is an example design but the power stage needs to be revised to meet the requirement.

    https://www.ti.com/tool/PMP20694

  • 0 in reply to Ray DiCecco
    TI__Genius 14755 points

    Thank you so much for the feedback and design guidance Ray and Ning!

    I'll go ahead and pass this info along to my customer and have them comment back on this thread directly with any follow-up questions they may have.

    -Matt