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T
1
5
N
C
_
T
1
5
R
1
N
C
_
R
1
R
3
V
M
E
M
S
E
L
T
5
G
N
D
_
N
E
T
1
G
1
6
N
C
_
G
1
6
B
7
N
C
_
B
7
B
5
N
C
_
B
5
B
8
V
B
A
T
S
E
N
S
E
A
5
V
C
H
G
A
7
S I
E
N
S
E
A
6
G
A
T
E
D
R
V I
E
Trickle-
CHARGING
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
V
V
C
H
A
R
G
E
C
3
2
5
0
1 .
u
R
3
5
5
P
R
E
C
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A
R
G
E
1
5 .
K
- 37 -
B
A
T
V
C
H
A
R
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R
1
0
8
D
1
0
2 .
C
U
R
1
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9
3
3
0
Q
1
0
0
G
S
4
5
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3
D
4
3
6
D
2
D
5
2
7
D
1
D
6
1
8
T
P
C
F
8
1
0
2
V
B
A
T
2
0
1
2
1 ,
%
R
3
5
2
1
5
R
3
5
3
1
K
R
3
5
6
4
7
K
I
M
X
9
T
1
1
0
Q
3
0
1
3. TECHNICAL BRIEF
NORMAL
CHARGING
C
1
2
7
0
0
1
0
u
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2
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B
A
T
C
3
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4
0
1 .
u
L
D
3
0
6
3
Q
4
0
1
2
2
S
C
5
5
8
5
1
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