LG S5000 Service Manual page 37

3. TECHNICAL BRIEF
Figure 3-21. CIRCUIT FOR BATTERY CHARGING AT AD6537B
In order to reduce time for trickle charging, additional circuit(Pre-charge circuit) was included.
This circuit has supplied Max 160mA current into the battery additionally.
So call it, it reduce trickle charging time
T15
NC_T15 IBIAS
R1
NC_R1 CRST
R3
VMEMSEL
T5
GND_NET1
G16
NC_G16
B7
NC_B7
B5
NC_B5
B8
VBATSENSE
A5
VCHG
A7
ISENSE
A6
GATEDRIVE
C703
0.1u
Pre-CHARGING
R745
PRE_CHARGE
1.5K
- 38 -
VBAT
VCHARGE
C127
1u
C128
D101
10u
CUS02
R107 330
G S
4 5
D3 D4
3 6
D2 D5
2 7
D1 D6
1 8
TPCF8102-TE85L-F
U102
VCHARGE
VBAT
R748
0
Q701
UMX1NTN
NORMAL
CHARGING