Charging Trouble - LG CG225 Service Manual

4. TROUBLE SHOOTING

4.6 Charging Trouble

• Charging method : CC-CV
• Charger detect voltage : about 5.2V
• Charging time : 3h min under
• Charging current : 550mA
• Cutoff current : 120mA
• Low battery alarm
- Idle : 3.55V
- Dedicated : 3.59V
4.2V~3.87V
Block Diagram
VCHG
ICTL
• 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.
3.86V~3.75V
CHARGER
R313
C308
4.7u
100K
(1608)
PCHG
VCCS
VBATS
3.74V~3.68V
Charging Current
C307
6
S2
22n
4
S1
3
G
D3 1
U303
2
NDC652P D2
D1 5
R319 15
C311
47p
- 50 -
3.67V~3.60V
D301
CUS02 VBAT
R321
0.2
C312 C313
4.7u 4.7u
(1608)