Technical information

Battery Charger Interface
50 G24-L Module Hardware Description November 15, 2008
Monitoring (Full)
When the battery is fully charged and reaches above 4.20V, the charging process is stopped. The
battery charging circuit is deactivates the charging path and current from the external charger is
not required.
At this stage the battery voltage is monitored continuously by the G24-LC as it discharges. While
the battery discharges, charging may be performed in a discontinuous mode, in which the
charging circuit activates and deactivates periodically, providing low current, as required to keep
the battery fully charged.
In case the battery voltage drops below the monitoring state level, the charging process will
switch back to the charging state and provide the required current.
Figure 2-27 below depicts the charging process.
Figure 2-27: Battery Charging Process
CC State
Pre-Char
g
e
Charging 1
s
t
Stage
t
4.20V
Full Current
(500mA)
3.60V
2
n
d
Sta
g
e
3
r
d
Sta
g
e
250mA
120mA
150mA
25mA
3.30V
Under Voltage
Full stage