TPS3897: sense input negative voltage will arrive -0.6v,

Frank Xiao

Genius 12055 points

Part Number: TPS3897

Hi team,

My customer is using the TPS3897 now, and the sense input negative voltage will arrive -0.6v, over the Absolute Maximum (-0.3v), whether it has risks here? Thanks.

over 4 years ago

0 Abhinav.Sharma over 4 years ago

TI__Genius 9375 points

Frank,

This seems like a voltage transient more than an actual issue that will cause the part to dysfunction. Is your application particularly noisy? We recommend placing a bypass capacitor on SENSE to reduce spikes like this, and could likely prevent a voltage undershoot as you're seeing.

Let me know if you need more help on this.

Thanks,

Abhinav.

0 Frank Xiao over 4 years ago in reply to Abhinav.Sharma

TI__Genius 12055 points

Hi Abhinav,

If the customer cannot change the schematic now, whether it has risks here? Thanks.

0 Abhinav.Sharma over 4 years ago in reply to Frank Xiao

TI__Genius 9375 points

Frank,

It should still work fine, but if you face any issues as a result of this, it is most likely due to high noise in your circuit. I believe functionality should stay unaffected, however.

Thanks,

Abhinav.

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TPS3897: sense input negative voltage will arrive -0.6v,