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BQ76930: bq76930 datasheet absolute maximum ratings confusion

Aleksandar Lazarov81
Prodigy 220 points
Part Number: BQ76930

Hi,

I'm having a bit of a trouble interpreting the absolute maximum ratings for the input voltage of the bq76930 as stated in the datasheet. According to the datasheet, the absolute maximum rating on a VCn pin in the second group, referred to VC5x (where n=6..10) is defined as n*7.2V. Does this mean that for n=10 (VC10) the absolute maximum rating of VC10-VC5x is 72V?

I have a feeling that this is a mistake and the rating should be n*7.2V for pins VC(5+n)-VC5x where n=1..5.

Please advise on the correct interpretation.

Kind regards,
Aleks

  • 0
    TI__Guru 54715 points

    Hi Aleks,

    Yes it is confusing, it looks like the author had difficulty expressing it simply.  The intent is that the single ended limit above the local group reference increases by 7.2V for each input. 

    I think the limit for (VCn-VC5x) where n = 6..10   would be ((n-5) x 7.2)

    Or VC6 can be 7.2 V above VC5X,  VC7 can be 14.4V above VC5X, etc

    I will ask that this be clarified in a future revision of the data sheet.  Thank you for bringing it to our attention.

  • 0 in reply to WM5295
    Prodigy 220 points

    Hi,

    Thanks for the clarification!

    Cheers,
    Aleks