Charging - LG -E455 Service Manual

4.6 Charging

E455 uses Chager IC(Mini ABB) for charging control. The Chager IC(SNB1058A3RSMR) circuit includes the charging pass transistor
detects the VDD and VBAT voltages, and its control driver. The Chager IC(SNB1058A3RSMR) maximum charging current is set around
700mA.
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- The Chager IC(SNB1058A3RSMR) ) control the charging current
- Charging current flows into the main battery
Troubleshooting Check Point
- Connection of the TA or u-USB cable
- Main battery
Mini ABB + LDO
VBATT
VCHG_LDO_4V9
C454
1u
C455
1u
DSS --> OPEN/PD : USB
PU : UART
+1V8_VIO_MTK
I2C_SENSOR_SDA
I2C_SENSOR_SCL
MINIABB_INT
LGE Internal Use Only
C463 C464 C465
1u 1u
1u
3
VIN
25 23
VBAT1 VBUS1
26 24
VBAT2 VBUS2
U402
27 22
EXPDET D-
21
U402
D+
11 20
USB1DM ID
12 19
USB1DP R2_2K
13 18
USB2DM CLDO
14
USB2DP
15
AUDL
16
AUDR
17
MIC
32
DSS
C450
10n
C466
1u VBUS_CHG_IN
C451
1u
- 131 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
U402
Only for training and service purposes