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LM25143-Q1: LM25143-Q1

Jayaraman M H
Prodigy 40 points
Part Number: LM25143-Q1
Other Parts Discussed in Thread: LM5143

Hi TI team,

Good evening.

Kindly review the schematic of Buck converter using two LM5143 ICs.

Input:36V

Output:2V to 24V variable voltage with 30A single output.

We can obtain the variable voltage or not?

I have shared the below documents for your reference. Please find it.

5076.LM(2)5143-Q1 quickstart design tool - revB2.xlsm1856.Schmatic of LM5143.pdf

  • 0
    TI__Mastermind 22299 points

    Hello,

    Your quickstart calculator says 1.5µH inductors but the schematic is 6.8µH.

    The 6.8µH is better value, please update your quickstart.

    Also you're using 2x 7mΩ current sense resistors, either use 3.5mΩ in quickstart or use 2x8mΩ.

    You are using 4x330µF output aluminum capacitors?

    Why are your ceramic capacitors 16V if the output voltage is up to 24V?

    This error amplifier is transconductance, you dont do COMP to FB, you do COMP to GND.

    Hope this helps,

    -Orlando