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TPS546E25: VSEL\FB

Hailiang Zhang
Genius 11020 points
Part Number: TPS546E25

Tool/software:

Hi Team,

Could you pls suggest how to configure the VSEL/FB pin when external divider is used? Let take Vout=1.25V as an example. Thanks.

Regards，
Hailiang 

  • +1
    TI__Genius 11295 points

    Hi Hailiang,

    To use the external divider, a few steps must be taken:

    • Ensure the J12 or MSEL1 is set to "External Divider" resistors
    • Ensure J15 or VSEL/FB jumper on EVM is open. For  VSEL/FB pins external divider, the Vref is 0.4V so for 1.25Vout. top feedback resistor should be 21 kohm and bottom feedback resistor should be 10kohm.
    • In the image below, R15 should be populated, and R11 and R13 are populated with the feedback resistors.

    Hope this helps!

    If this helped answer your question, please don't forget to click "This resolved my issue".

    Thank you,

    Calan