Good Morning,
I am working on BMS that's requires high coulometric measurement accuracy, two battery IC monitor devices (Bq27010) and Bq26220 (21)) sould be implemented. I would like to have further information about:
Bq26220:
Relation between the output frequency (counting frequency) and input voltage developped across the sense resistor
How to estimate the overall accuracy of the output data (unit : microVh), including T°C gain coefficient, Integral nonlinearity, supply voltage gain coefficient,..
G(VFC) Charge/discharge gain Temperature = 25 C, VCC = 3.6 88 91 94 Hz/V
G(VCC) Supply voltage gain coefficient
−100 mV < (V(SRP) − V(SRN)) < 100 mV 0.5 %/V
G(TCO) Temperature gain coefficient 0.005 %/C
INL Integrated nonlinearity
−100 mV < (V(SRP) − V(SRN)) < 100 mV 0.2% 0.5%
How fast fully conversion can be performed between the initiated of the input signal conversion and the output data (coulombs couting) => VFC (voltage to frequency converter) latency (in seconds)
best regards
Thank you very much