MAX17047/MAX17050
ModelGauge m3 Fuel Gauge
and AverageCurrent registers, the device can reject false
End-of-Charge Detection
end-of-charge events such as application load spikes
or early charge-source removal. See the End-of-Charge
Detection graph in the Typical Operating Characteristics
and Figure 26.
The device detects the end of a charge cycle when
the application current falls into the band set by the
ICHGTerm register value. By monitoring both the Current
AVERAGE CURRENT
CURRENT
CHARGING
1.25 x ICHGTerm
0.125 x ICHGTerm
0mA
HIGH-CURRENT LOAD SPIKES DO NOT GENERATE END-OF-CHARGE
DETECTION BECAUSE CURRENT AND AVERAGE CURRENT READINGS
DO NOT FALL INTO THE DETECTION AREA AT THE SAME TIME.
DISCHARGING
AVERAGE CURRENT
CURRENT
CHARGING
1.25 x ICHGTerm
0.125 x ICHGTerm
0mA
DISCHARGING
EARLY CHARGER REMOVAL DOES NOT GENERATE END-OF-CHARGE
DETECTION BECAUSE CURRENT AND AVERAGE CURRENT READINGS
DO NOT FALL INTO THE DETECTION AREA AT THE SAME TIME.
Figure 26. False End-of-Charge Events
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