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LM51561: Design verify for Boost Converter

Kruti Panchasara
Prodigy 70 points
Part Number: LM51561

Hello,

We are ready with our Schematics which TI suggested parts for Boost Converter.

We want to you to verify our Schematics.

our requirements for Boost Converter IC are:

          1. Input Voltage: 12VDC-60VDC

          2. Output Voltage: 57VDC 

          3.Current Out (Iout): 1Amps

 We want you to check

1. Bias pins connection.

2. Inductor value and Mosfet is compatible with the IC..?

Thanks,

kruti Panchasara

  • 0
    TI__Guru 65470 points

    Hello kruti,

    You cannot connect VCC to VIN. You need to connect BIAS to VIN. And you need to connect a capacitor to VCC.

    For checking the external components, you might use our quickstart calculator:  https://www.ti.com/lit/zip/snvc224

    The inductor should have a current rating of roughly 5A.

    I would recommend adding a filter to CS signal as well as a 0 ohm gate resistor if needed.

    In addition, I always recommend for the first prototype having all possibilities on the digital pins available instead of fixing them to e.g. GND.

    Place the FB resistors as close as possible to the IC.

    I recommend using AGND and PGND.

    You can review the EVM layout and copy it.

    Best regards,
    Brigitte