BL4054/BL4054B
800mA Standalone Linear Li-Ion Battery Charger
with Thermal Regulation in SOT23-5/TSOT23-5
Typical Performance Characteristics
CHRGb Pin Current vs Temperature
(Weak Pull-Down State)
25
60
Trickle Charge Current
vs Temperature
60
50
40
30
20
10
Trickle Charge Current vs
Supply Voltage
50
20
V
CC
=5V
V
BAT
=4.3V
V
CHRGb
=5V
R
PROG
=2K
R
PROG
=2K
I
CHRGb
(
µΑ)
I
TRIKL
(mA)
I
TRIKL
(mA)
40
30
20
10
15
V
CC
=5V
V
BAT
=2.5V
V
BAT
=2.5V
T
A
=25
°
C
10
R
PROG
=10K
5
-50
-25
0
25
50
75
100
125
R
PROG
=10K
75
100
125
TEMPERATURE(
°
C)
0
-50
-25
TEMPERATURE(
°
C)
0
25
50
0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
V
CC
(V)
Trickle Charge Threshold vs
Temperature
3.000
2.975
2.950
Charge Current vs Battery Voltage
600
500
400
300
200
100
0
2.7
Charge Current vs Supply Voltage
600
V
CC
=5V
R
PROG
=10K
R
PROG
=2K
500
400
300
200
I
BAT
(mA)
V
TRIKL
(V)
2.925
2.900
2.875
2.850
2.825
2.800
-50
-25
0
25
50
75
100
125
I
BAT
(mA)
V
BAT
=4V
T
A
=25
°
C
V
CC
=5V
R
PROG
=2K
T
A
=25
°
C
3.0
3.3
100
R
PROG
=10K
3.9
4.2
4.5
TEMPERATURE(
°
C)
V
BAT
(V)
3.6
0
4.0
4.5
5.0
V
CC
(V)
5.5
6.0
6.5
7.0
Charge Current vs Ambient
Temperature
600
500
Recharge Voltage Threshold
vs Temperature
4.11
4.09
Power FET "ON" Resistance
vs Temperature
700
650
R
PROG
=2K
V
CC
=5V
R
PROG
=10K
V
RECHRG
(V)
I
BAT
(mA)
400
300
200
100
4.07
4.05
4.03
4.01
V
CC
=5V
V
BAT
=4V
R
PROG
=10K
0
-50 -25
0
TEMPERATURE(
°
C)
25
50
75
100 125 150
3.99
-50
-25
TEMPERATURE(
°
C)
0
25
50
75
100
125
R
DS(ON)
(m
Ω
)
600
550
500
450
400
350
-50
V
CC
=4.2V
I
BAT
=100mA
R
PROG
=2K
-25
0
25
50
75
100
125
TEMPERATURE(
°
C)
PPMIC BU
BL4054/BL4054B Rev 1.4
5/2009
www.belling.com.cn
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