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3. TECHNICAL BRIEF
3.5 Charger control
A programmable charger in AB3100 is used for battery charging. It is possible to set limits for the output
voltage at CHSENSEN and the output current from DCIO via the sense resistor to CHSENSEN. The voltage at
CHSENSEN and the current feed to CHSENSEN cannot be measured directly by the GPADC. Instead, the two
measuring amplifiers translate these inputs to a voltage proportional to the input and within the range of
the GPADC. (Fig.3-5-1) shows the schematic of charging control part.
Name
CHSENSEP
CHSENSEN
LGE Internal Use Only
C
H
A
R
G
I
N
G
C
I
R
C
U
I
T
D
I C
O
_
N I
T
V
B
U
S
Q
5
0
0
S
2
G
2
D
2
D
4
F
r
o
m
S
2
t
o
S
1
:
2
m
m
D
3
D
1
S
1
G
1
C
H
R
E
G
V
B
A
T
_
H
V
B
A
T
C
H
S
+
2
0
1
2
R
5
1
3
R
o
u
t
e
a
s
a
d
i
f
f
e
r
e
n
t
i
a
l
p
a
i
r
1
/
4
W
0
1 .
1
%
R
5
1
4
0
U
S
B
c
h
a
r
g
i
n
g
p
a
t
h
C
H
- S
V
B
U
S
D
5
0
2
C
1
1
A
1
_
C
2
B
D
A
T
A
3
A
2
C
N
5
0
0
2
K
D
S
2
2
1
E
_
R
T
K
1
2
3
B
A
T
T
E
R
Y
4
C
O
N
N
E
C
T
O
R
H
S
B
C
3 -
P
T
2
5
1 -
4
E
N
Z
Y
0
0
1
7
7
0
1
B
A
T
T
_
G
N
D
F
G
S
+
2
0
1
2
R
5
1
9
R
o
u
t
e
a
s
a
d
i
f
f
e
r
e
n
t
i
a
l
p
a
i
r
1
/
4
W
0
0 .
2
5
1
%
R
5
2
1
0
F
G
- S
Fig. 3-5-1. Battery charging circuit
Fig. 3-5-2. Battery charging block diagram
Type
Unused
Analog
VBAT
Analog
VBAT
Table 3-5-1. Charger Control channel spec
- 58 -
M
2
S
R
S
T
_
n
S
R
S
T
_
N
M
1
S
C
L
K
S
C
L
K
N
3
S
D
A
T
S
D
A
T
A
1
1
B
D
A
T
A
B
D
A
T
A
J
1
4
F
G
S
+
F
G
S
E
N
S
E
P
C
5
2
7
4
7
p
V
B
A
T
J
1
3
F
G
- S
F
G
S
E
N
S
E
N
G
2
V
B
A
T
_
D
H
1
C
H
S
+
C
H
S
E
N
S
E
P
O
T
P
H
2
C
H
- S
C
H
S
E
N
S
E
N
C
5
9
9
H
3
C
H
R
E
G
C
H
R
E
G
0
1 .
u
J
2
D
5
0
1
D
I C
O
_
N I
T
D
I C
O
_
N I
T
F
1
D
I C
O
E
2
V
B
U
S
V
B
U
S
U
S
F
B
1
3
L
F
2
T
R
C I
K
L
E
C
5
3
7
1
u
C
5
R
F
_
C
T
R
L
_
D
A
T
A
D
A
C
_
D
A
T
B
5
R
F
_
C
T
R
L
_
S
T
R
_
1
D
A
C
_
S
T
R
C
4
R
F
_
C
T
R
L
_
C
L
K
D
A
C
_
C
L
K
V
D
D
C
_
2
V
6
5
V
B
A
T
V
D
D
_
R
E
F
P
7
V
D
D
_
S
P
K
R
P
6
V
D
D
_
B
E
A
R
P
1
3
V
D
D
_
A
U
I D
O
P
3
V
D
D
_
A
U
X
O
G
1
V
D
D
_
R
E
F
V
D
D
E
_
1
V
8
C
5
5
5
C
5
4
7
C
5
4
8
A
1
2
1
u
0
1 .
u
0
1 .
u
V
D
D
I _
O
C
5
5
1
D
1
2
0
1 .
u
T
E
S
T
A
1
3
V
R
E
F
A
1
4
R I
E
F
C
5
5
2
R
5
2
0
1
u
1
0
0
K
1
%
Description
Current sensing input positive
Current sensing input negative
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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