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BQ35100: BQ35100: ACCUMULATOR mode error

Star Xu
Genius 9645 points
Part Number: BQ35100

Hi  

The customer design with BQ35100, using microcontroller I2C to read BQ35100, after pull up GE, reading Battery Status returns 0, which can read temperature and voltage.

However, when reading Accumulated Capacity, it always returns 0x30, 0xFD, 0xFF, and 0xFF (the first two values will change depending on the running time, while the last two values will always be 0xFF), and reading current also returns 0xFA and 0xFF. 

How to resolve this issue.

Waiting for your reply.

Thanks

Star

  • 0
    TI__Guru** 105590 points

    Hello Star,

    Can you clarify the issue? The examples given appear to show the expected behavior, in order to report negative values the gauge will report two's complement. 0xFF 0xFA (little endian) is essentially indicating there are a few milliamps in discharge.

    Sincerely,

    Wyatt Keller