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TPS259824OEVM: How to find VSPIKE

Kenji Ohno1
Genius 5095 points
Part Number: TPS259824OEVM

Hi Team,

I found the following formula in the datasheet P42.

VSPIKE (absolute) = VIN + ILOAD x (LIN / CIN) ^ 1/2

How can I find the value of LIN?

Can I think of CIN as 0.1uF?

Best Regards,

Kenji

  • 0
    TI__Guru* 95891 points

    Hi Kenji,

    Keep the eFuse in OFF state and use a known value of CIN, for example 0.1uF. Then hot-plug the supply source and measure the frequency of oscillations. 

    Fosc= 1/[2*pi*sqrt(LIN.CIN)] can be used to find value of LIN.

    Best Regards,Rakesh