LG -P970 Service Manual page 63

Battery Voltage Regulation (CV Mode)
The battery voltage regulation feedback is through the BATT pin. The RT9524 monitors the battery voltage
between BATT and GND pins. When the battery voltage closes in on the battery regulation voltage threshold,
the voltage regulation phase begins and the charging current begins to taper down. When the charging current
falls below the programmed end-of-charge current threshold, the CHGSB pin goes high to indicate the
termination of charge cycle. The end-of-charge current threshold is set by the IEOC pin. The resistor R
connected to IEOC and GND. The parameters K
The current threshold of IEOC (%) is defined as the percentage of fast-charge current set by R
CHGSB pin is pulled high, the RT9524 still monitors the battery voltage. Charge current is resumed when the
battery voltage goes to lower than the battery regulation voltage threshold.
3.10.3.3 Constant Voltage Charging
Constant voltage charging begins when the battery voltage reaches a target voltage, 4.2V. The end of constant
voltage charging is commonly detected around 240mA from Travel adaptor.
3.10.3.4 LGP970 Charging Specification
-Charging Method : CC & CV (Constant Current & Constant Voltage)
-Maximum Charging Voltage : 4.2V
-Maximum Charging Current : 946mA
-Nominal Battery Capacity : 1500mAh
-Charging time : Max. 3h 30m
- Full charge indication current (icon stop current) : 156mA
LGE Internal Use Only
and IEOC are specified in the specification table.
EOC
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3. TECHNICAL BRIEF
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