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BQ40Z80: BQ40z80 SRP, SRN abs rating

Hollis Liu
Intellectual 2595 points
Part Number: BQ40Z80

HI Team, 

In bq40z80 datasheet, the abs rating of SRP, SRN is -0.3V to V_REG+0.3V. I would like to know what will happen if the common voltage of SRP, SRN is below -0.3V, for example -0.4V. Will that damage IC?

Because the discharge current will be very high when the short circuit happens, even we choose 1mohm sensing resistor. And customer concerns about the damage.

  • 0
    TI__Mastermind 34775 points

    Hi Hollis,

    Hollis Liu said:
    In bq40z80 datasheet, the abs rating of SRP, SRN is -0.3V to V_REG+0.3V. I would like to know what will happen if the common voltage of SRP, SRN is below -0.3V, for example -0.4V. Will that damage IC?

    We only guarantee the IC will survive -0.3V. It may survive -0.4V but it's not guaranteed by TI to survive. For 1m-ohm sense resistor -0.3V is equivalent to -300A. Are you anticipating that much current during a short circuit event?