LG KG245 Service Manual page 36

NC_T15
NC_R1
VMEMSEL
GND_NET1
NC_G16
NC_B7
NC_B5
VBATSENSE
VCHG
ISENSE
GATEDRIVE
Pre - CHARGING
ONNOFF
Figure 3-20. 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
VBAT
R1
R3
T5
G16
B7
R104
B5
0.2
(1%)
B8
A5
A7
R105
A6
TPCF8102-TE85L-F
VCHARGE
C210 ERHY0007007
R209
15
(1%,1/8W)
1u
Q201
6
R215
5
10K
4
UMX1NTN
- 37 -
3. TECHNICAL BRIEF
NORMAL CHARGING
VCHARGE
C126
1u
D101
C125
(2012)
4.7u
CUS02
330
Q101
G S
4 5
D3 D4
3 6
D2 D5
2 7
D1 D6
1 8
VBAT
R216
1K
1
R220
2
2
7.5K
3
R223 R226
10K 20
3
Q202
2SC5585
1