LG D337 - Charging TS

4. DOWNLOAD
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Only for training and service purposes
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3.10. 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
current is set around 820mA.
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- The Charger IC control the charging current
- Charging current ows into the main battery
Troubleshooting Check Point
- Connection of the TA or u-USB cable
PGND
VIN BATT
ISET PGB
GND1 CHGSB
LDO GND2
IEOC EN_SET
1
2
47K
R4700
VBUS_USB_IN
1
2
R4701
100K
+1V8_MTK_VIO
2
1
C47001u
VBAT
2
1
1u C4701
+4V9_VCHG_LDO
2
1
C47021u
11
1 10
2 9
3 8
4 7
5 6
RT9536GQW
U4700
CHG_EN
CHG_STAT
NOTE1 NOTE2
C9598
1
2
DNI
R4702
2
1
680
TOL=0.01
C9599
1
2
DNI
R4703
2
1
3.3K
TOL=0.01
4.TroubleShooting
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
current is set around 820mA.
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- The Charger 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
Main
battery
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