Charging Ts - LG D337 Service Manual

3.10. Charging TS

3.9 Charging TS
D337 uses Charger IC(liner Charger) for charging control. The Charger IC circuit includes the charging pass
transistor detects the VDD and VBAT voltages, and its control driver. The Charger IC maximum charging
D337 uses Charger IC(liner Charger) for charging control. The Charger IC circuit includes the charging pass
current is set around 820mA.
transistor detects the VDD and VBAT voltages, and its control driver. The Charger IC maximum charging
current is set around 820mA.
Charging Procedure
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- Supply the VCHG use a TA or u-USB cable
- The Charger IC control the charging current
- The Charger IC control the charging current
- Charging current flows into the main battery
- Charging current flows into the main battery
Troubleshooting Check Point
Troubleshooting Check Point
- Connection of the TA or u-USB cable
- Main battery Main battery
- Connection of the TA or u-USB cable
NOTE1 NOTE2
LGE Internal Use Only
VBUS_USB_IN
+4V9_VCHG_LDO
1
VIN
2
ISET
3
GND1
4
LDO
5
IEOC
2
2
2
1
1
1
4. Trouble Shooting
VBAT
11
PGND
10
BATT
9
U4700
PGB
8
RT9536GQW
CHGSB
7
GND2
6
EN_SET
2
1
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4. DOWNLOAD
+1V8_MTK_VIO
1
R4700
47K
2
CHG_STAT
CHG_EN
2
R4701
100K
1
Only for training and service purposes