Only For Training And Service Purposes - LG KM380t Service Manual

3.3.2 Charging
KM380t charge the battery using an external charging IC of Intersil ISL9221 for Li-Ion or Li-Polymer
battery in 4.2 Volts level.
4.2V~3.69V
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 : 4.16 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)
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

3.69V~3.53V
3.53V~3.43V
Figure 7. Battery Block Indication
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3. TECHNICAL BRIEF
3.43V~3.3V
LGE Internal Use Only