LG C3400 Service Manual page 34

VMEMSEL
VBACKSEL
NC_G16_VPLL_TE
CHGDACREF
CHGOSC
VBATSENSE
VCHG
ISENSE
GATEDRIVE
AIN3L
Pre_CHARGING
RPWRON
Figure 3-21. CIRCUIT FOR BATTERY CHARGING AT AD6535
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
(1%)
R122 1.2M
T15
IBIAS
R1 C152 1u
CRST
R3
T5
G16
(1%)
B7 R126 100
B5
C151 0.01u
B8
A5
A7
A6
R13
R14
VCHARGE
C216
R217
1u
15
Q201
3
R222
2
20K
1
R224
100K UMX1NTN
- 33 -
3. TECHNICAL BRIEF
VBAT
VCHARGE
C143
(1%) (2012)
1u
D102
CUS02
R108 330
TPCF8102
G S
4 5
D3 D4
3 6
D2 D5
2 7
D1 D6
1 8
Q100
VBAT
R221
1K
4
R223
5
7.5K
6
R225
10K
NORMAL
CHARGING
C126
10u
VCHARGE
R218
390
LD200
Q200
2SC5585
R226
20