LG GX500 Service Manual page 44

GX500 Operational Description
3.3.3 Charging
SM-POWER provides together with an external p-channel FET Siliconix Si3455 an external AC-adapter a
complete charge control function for charging of Li-Ion or Li-Ion-Polymer batteries. Either a 1-cell Li-Ion or
Li-Ion-Polymer battery with 4.1, 4.2 or 4.4 Volts may be used.
4.2V~3.75V
Figure 3-8 Battery Block Indication
1. Charging method : CC-CV
2. Charger detect voltage : 4.0 V
3. Charging time : 3h 15m
4. Charging current : 680 mA
5. CV voltage : 4.2 V
6. Cutoff current : 120 mA
7. Full charge indication current (icon stop current) : 120 mA
8. Recharge voltage : 4.16 V
9. Low battery alarm
a. Idle : 3.58 V ~ 3.3 V
b. Dedicated : 3.58 V ~ 3.3 V
10. Low battery alarm interval
a. Idle : 3 min
b. Dedicated : 1 min
11. Switch-off voltage : 3.3 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)
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Only for training and service purposes
LG Electronics
3.75V~3.65V 3.65V~3.58V 3.58V~3.30V
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3. TECHNICAL BRIEF
Revision A
LGE Internal Use Only
LGE Property