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3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.3.2 Charging
KS360 charge the battery using an external charging IC of Intersil ISL9221 for Li-Polymer battery in
4.2 Volts level.
1 Charging method : CC-CV
2 Charger detect voltage : 4.0 V
3 Charging time : 2h 30m
4 Charging current : 400 mA
5 CV voltage : 4.2 V
6 Cutoff current : 110 mA
7 Full charge indication current (icon stop current) : 110 mA
8 Recharge voltage : 4.15 V
9 Low battery alarm
a. Idle : 3.45 V ~ 3.35 V
b. Dedicated : 3.45 V ~ 3.35 V
10. Low battery alarm interval
a. Idle : 3 min
b. Dedicated : 1 min
11. Switch-off voltage : 3.35 V
12. Charging temperature adc range
a. ~ -5 : low charging voltage operation (3.6 V ~ 3.9 V)
b. -5 ~ 50 : standard charging (up to 4.2 V)
c. 50 ~ : low charging voltage operation (3.6V ~ 3.9V)
4.2V~3.74V 3.74V~3.64V
3.64V~3.45V 3.45V~3.35V
Figure 5. Battery Block Indication