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LM5122: LM5122

Ankur Singh
Prodigy 20 points
Part Number: LM5122
Other Parts Discussed in Thread: LM5170,

Hi TI Team,

I want to design a non-isolated boost converter with following specs-

Vin= 10V-35V

Vout= 60V

Io= 60A

Po= 3.6kW.

https://webench.ti.com/power-designer/switching-regulator/customize/3

On TI webench, it is recommended that we can design for 30A and I want to use dual phase for 30A each.

Please advise it will work?

Thanks,

Ankur Singh

  • 0
    TI__Guru 67795 points

    Hello Ankur,

    Have a look at this design. It is somewhat coming close to your needs: PMP22396 reference design | TI.com

    It uses LM5170 which is designed for high power applications.

    When the input voltage is at 10V, you need about 400A from the input. You need to split this power into several phases, otherwise cooling will be an issue. So 2 phases is for sure not enough.

    I would recommend going to 500W per phase, so we are speaking about 8 phases in your case. Possibly you can go higher, if you are a very experienced power supply designer, but then I would go at least with 4 phases.

    Best regards,
    Brigitte

  • 0 in reply to Brigitte
    Prodigy 20 points

    Hi Brigitte,

    Are you suggesting 4 phases using LM5170 or LM5122 if bi-directional is not my requirement?

    Thanks,

    Ankur Singh

  • 0 in reply to Ankur Singh
    TI__Guru 67795 points

    Hello Singh,

    I recommend using 4 phases independent on which device. LM5170 has the advantage that you can easily stack the EVMs for more phases.

    Best regards,
    Brigitte