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LM5143: Please recommend Synchronous Buck controller?

Andrew Massey
Prodigy 150 points
Part Number: LM5143
Other Parts Discussed in Thread: LM5148, , LM5148-Q1

Dear Consultants,

Please recommend a Synchronous Buck controller for 20-58Vin and 13.5V out and 50A out?

  • 0
    TI__Guru 57472 points

    Hi Andrew,

    Take a look at the LM5143 (65V controller) or 2 x LM5148 (80V controller) for a 2-phase design at 25A/phase and ~200kHJz switching frequency. Alternatively, and particularly if the ambient temperature is high, consider going with 2 x LM5143 in a 4-phase implementation at 12.5A/phase, where the switching frequency may be increased to 400kHz given the lower current.

    Take a look at the LM5143 and LM5148 product folders for more detail. The LM5143 product folder has an app note for a 4-phase design as well. Make sure to download the quickstart calculator to assist with the design.

    Regards,

    Tim

  • 0 in reply to Timothy Hegarty
    TI__Guru 57472 points

    PS: if this is automotive, the corresponding part numbers are LM5143A-Q1 and LM5148-Q1.