Hello,
I am using the bq34z950, which has a DQ interface and the standard registers that are available over DQ.
I noticed that when trying to convert NAC to Remaining Capacity, the provided equation does not give the expected result.
According to several datasheets of parts that report NAC over DQ:
NAC = RC() * Rsns * 1/mV to mAh Scale
OR
RC() = (NAC * mV to mAh Scale) / Rsns
My example uses known values for RemCap = 4689mAh as reported through SMBus, mv to mAh scale = 640, and Rsns = 3.359mOhm. The reported value in this case is NAC = 0x2706 = 9990uVh
However, when using the provided equation and reported NAC, the resulting RemCap is 1903mAh, which is only about 40% of the reporetd RemCap.
Can you help me understand why the error exists?