Charging - LG -E445 Service Manual

4.6 Charging

E445 uses Chager IC(liner Charger) for charging control. The Chager IC circuit includes the charging pass transistor detects the VDD
and VBAT voltages, and its control driver. The Chager IC maximum charging current is set around 700mA.
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- The Chager IC control the charging current
- Charging current flows into the main battery
Troubleshooting Check Point
- Connection of the TA or u-USB cable
- Main battery
VCHG_LDO_4V9
C602
1u
U601
LGE Internal Use Only
VBUS_CHG_IN
U601
1
VIN
2
U601
ISET
3
GND1
4
LDO
5
IEOC
C604
1u
- 121 -
4. TROUBLE SHOOTING
+1V8_VIO_MTK
VBATT
11
PGND
10
BATT
9
PGB
8
CHGSB
7
GND2
6
EN_SET
C603
1u
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EOC
CHG_EN
Only for training and service purposes