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TPS53667EVM-769: CSD95490 LSET resistor value

K. Sasaki14
Guru 10200 points
Part Number: TPS53667EVM-769

TPS53667EVM LSET resistor value of CSD95490 is 130k ohm.
From CSD95490 datasheet equation, I think LSET resistor value should be about 110k ohm when inductor value is 150nH.

Why is 130k resistor selected?

Best Regards,
Kohei Sasaki

  • 0
    TI__Expert 4060 points

    Hi Kohei,

    It looks like the power stages used in the original apps schematic were a pre-release version of the IC. The CSD95490 was updated since that time and then released but the schematic was not changed.

    The correct LSET value should be 110kΩ as you expect. I'll let the product line know so they can update the datasheet.

    Thanks,

    Carmen