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TPS25981: high inrush current

Jeff YANG
Mastermind 7875 points
Part Number: TPS25981

Hi,

We have DDR5 application may have peak 79.7A inrush current about 20~30us, does TPS25981x have any possible to avoid this inrush current trig OCP?

Seem the maximum inrush current can avoid is 2x ILIM, right? thanks! 

Thanks!

Jeff

  • 0
    TI__Mastermind 39045 points

    Hi Jeff,

    I apologies for the delayed response.

    Did you get any solution?

    TPS25981 device have both scalable Fast Trip (SFT) and Fixed Fast Trip (FFT). FFT threshold is 39.5A and SFT is 2*ILIM. 

    Can you confirm, the device is not triggering the circuit breaker for this inrush current event and you want OCP to trigger. 

    Can you share the schematic.

    Best Regards,
    Arush