Charging Trouble - LG MG180C Service Manual

4.6 Charging Trouble

• Charging method : CC-CV
• Charger detect voltage : about 5.2V
• Charging time : 2h 30 min under
• Charging current : 550mA
• Cutoff current : 120mA
• Low battery alarm
- Idle : 3.55V
- Dedicated : 3.59V
4.2V~3.88V
Block Diagram
• Switch-off voltage : 3.35V
• Charging temperature ADC range
- ~ -20°C : small charging operation.
- -20°C ~ 60°C : charging.
- 60°C ~ : not charging operation small charging operation.
3.87V~3.75V
CHARGER
VCHG
R426
C406
4.7u
100K
(1608)
ICTL
PCHG
VCCS
VBATS
4. TROUBLE SHOOTING
3.74V~3.68V
Charging Current
Q400
NDC652P
C409
6
22n
S2
4
S1
3
G
1
D3
2
D2
5
D1
R427
15
D400
CUS02
R428
0.2
(2012)
C411 C412
47p 4.7u
(1608)
- 47 -
3.67V~3.60V
VBAT
C413
0.1uF