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TPS57114-Q1: Equation (22)

Kuramochi Tadahiko
Guru 28715 points
Part Number: TPS57114-Q1

Hi,

The inductance value 1.36uH is showed on the datasheet p22.

I calculated this value based on equation (22), however the result is 0.96uH on datasheet's condition(p21).

Is the value(=1.36uH) correct?

Best Regards,

Kuramochi

  • 0
    TI__Guru**** 191445 points
    I calculate 1.0 uH for those design inputs. If you also include the variation in switching frequency of 20% then the calculated value becomes 0.8 uH. The actual schematic shows 0.75 uH, which is the closest actual value to 0.8 uH. I suspect that the datasheet text of section 9.2.2.2 was copied and pasted from another datasheet and the calculation result of 1.36 uH was not updated to reflect the new value.