AIC1804
Three- Cell Or Four-Cell Lithium-Ion Battery
Protection IC
FEATURES
Cell Number Selection Function to Select 3 or 4
cells Protection.
Ultra-Low Quiescent Current at 17
µ
A (4-Cell,
V
CELL
=3.5V).
Ultra-Low Power-Down Current at 2.2µA (4-Cell,
V
CELL
=2.3V)
Wide Supply Voltage Range: 2V to 18V.
Precision Overcharge Protection Voltage:
4.35V± 30mV for the AIC1804A
4.30V± 30mV for the AIC1804B
4.25V± 30mV for the AIC1804C
4.20V± 30mV for the AIC1804D
Externally Set Overcharge,Overdischarge and
Overcurrent Delay Time.
Built-in Cell-balancing Bleeding Network under
Overcharge Condition.
Three Detection Levels for Overcurrent Protection.
DESCRIPTION
The AIC1804 is designed to protect the lithium-
ion battery from damage or degrading the lifetime
due to overcharging, overdischarging and
overcurrent for three-cell or four-cell lithium-ion
battery powered systems such as notebook PCs.
It can also provide the cell-balancing “bleeding”
function
to
automatically
discharge
the
overcharged cell until the overcharge condition is
released.
Safe and full utilization charging is ensured by
the accurate
±30mV
overcharge detection. Four
different specification values for overcharge
protection voltage are provided for various
protection requirements. The very low standby
current drains little current from the cell while in
storage.
APPLICATIONS
Protection IC for Three- or Four-Cell Lithium-Ion
Battery Packs.
TYPICAL APPLICATION CIRCUIT
R8
1K
1
16
NSL
VCC
R1
200
SI4435
BAT1
M1
SI4435
M2
R5
1M
FUSE
BATT+
C1
0.1µF
2
3
CS
VC1
14
R2
C2
0.1µF
2K
BAT2
4
OD
5
TD
UD2
13
VC2
12
C3
0.1µF
R3
2K
BAT3
R7
1M
2N3906
Q1
OC
UD1
15
R6
1M
C
TD
82nF
C
TI
2.2nF
6
TI
7
TC
UD3
11
10
VC3
C4
R4
33K
0.1µF
BAT4
C
TC
82nF
8
GND
UD4
9
AIC1804
BATT-
Protection Circuit for Four-Cell Lithium-Ion Battery Pack
Analog Integrations Corporation
4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1804-02 012102
1
AIC1804
ORDERING INFORMATION
AIC1804XCXXX
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
PACKAGE TYPE
S: SMALL OUTLINE
OVERCHARGE
PROTECTION VOLTAGE
A: 4.35V
B: 4.30V
C: 4.25V
D: 4.20V
Example: AIC1804ACSTR
4.35V version, in SO-16 Package &
Tape & Reel Packing Type
PIN CONFIGURATION
TOP VIEW
NSL 1
OC 2
CS 3
OD 4
TD
TI
TC
GND
5
6
7
8
16 VCC
15 UD1
14 VC1
13 UD2
12 VC2
11 UD3
10 VC3
9 UD4
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
................................................………………....................................... 18V
.........…………………..…....................................... 18V
DC Voltage Applied on other Pins
Operating Temperature Range............................………………......................... -20
°
C~70
°
C
Storage Temperature Range .............................……..………..................... - 65
°
C ~125
°
C
TEST CIRCUIT
R
OC
1M
I
OC
S1
1
V
OC
R8
V
CS
1K
V
OD
2
NSL
OC
UD1 15
3
4
CS
OD
UD2
5 TD
6 TI
C
TD
1nF
UD3 11
C
TI
2.2nF
C
TC
1nF
7 TC
VC3
10
13
VC1 14
VCC 16
I
CC
C1
0.1
µ
F
R1 200
V
CC
I
UD1
I
C1
I
UD2
I
C2
C2
0.1
µ
F
R2 2K
V
C1
VC2 12
I
UD3
I
C3
C3
0.1
µ
F
R3 2K
V
C2
8
GND
UD4 9
I
UD4
C4
0.1
µ
F
R4 33K
V
C3
AIC1804
2
AIC1804
ELECTRICAL CHARACTERISTICS
(T
A
=25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
SYMBOL
MIN.
TYP.
17
MAX. UNIT
26
µ
A
µ
A
µ
A
µ
A
µ
A
µ
A
VCC Pin Input Current in Normal
V
CELL
=3.5V
Mode
VC1 Pin Input Current in Normal
V
CELL
=3.5V
Mode
VC2 Pin Input Current in Normal
V
CELL
=3.5V
Mode
VC3 Pin Input Current in Normal
V
CELL
=3.5V
Mode
Vcc Pin Input Current in Power-
Down Mode
VC1,VC2,VC3 Input Current in
Power-Down Mode
V
CELL
=2.3V
V
CELL
=2.3V
AIC1804A
AIC1804B
Overcharge Protection Voltage
AIC1804C
AIC1804D
Overcharge Hysteresis Voltage
Overdischarge
Protection Voltage
Overdischarge Release Voltage
Overcurrent Protection Voltage
V
CELL
=3.5V
V
CELL1
=V
OCP
- 30mV
→
V
OCP
+30mV
V
CELL2
= V
CELL3
= V
CELL4
=
3.5V, C
TC
=1nF
V
CELL1
= 2.5V
→
2.3V
Overdischarge Delay Time
V
CELL2
= V
CELL3
= V
CELL4
=
3.5V, C
TD
=1nF
V
CELL
= 3.5V,0.15V<V
CC
-
V
CS
<0.3V,C
TI
=2.2nF
I
CC
I
C1
I
C2
I
C3
I
CC(PD)
I
C(PD)
4.32
4.27
V
OCP
4.22
4.17
V
HYS
V
ODP
V
ODR
V
OIP
150
2.27
2.85
135
0.7
1.8
0.4
1.0
0.2
0.5
2.2
0.01
4.35
4.30
4.25
4.20
200
2.40
3.00
150
4.0
0.15
4.38
4.33
V
4.28
4.23
250
2.53
3.15
165
mV
V
V
mV
Overcharge Delay Time
T
OC
10
21
32
mS
T
OD
10
21
32
mS
Overcurrent Delay Time (1)
T
OI1
7
15
23
mS
3
AIC1804
ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
Overcurrent Delay Time (2)
Overcurrent Delay Time (3)
TEST CONDITIONS
V
CELL
=3.5V,
0.3V<V
CC
-V
CS
<1.0V
V
CELL
=3.5V, V
CC
– V
CS
>1.0V
V
CELL1
=4.4V,
V
CELL2
= V
CELL3
=
V
CELL4
=3.5V,
OC Pin Short to V
CC
SYMBOL
MIN.
2
150
TYP.
4
300
MAX. UNIT
6
450
mS
µ
S
T
OI2
T
OI3
OC Pin Sink Current
I
OC
2.2
3.2
4.2
mA
OD Pin Output “H” Voltage
OD Pin Output “L” Voltage
Charge Detection Threshold
Voltage
UD1 Pin Cell-Balancing
Bleeding Current
UD2 Pin Cell-Balancing
Bleeding Current
UD3 Pin Cell-Balancing
Bleeding Current
UD4 Pin Cell-Balancing
Bleeding Current
V
CELL
=2.3V
V
CELL1
=4.4V,
V
CELL2
= V
CELL3
=
V
CELL4
=3.5V
V
CELL2
=4.4V,
V
CELL1
= V
CELL3
=
V
CELL4
=3.5V
V
CELL3
=4.4V,
V
CELL1
= V
CELL2
=
V
CELL4
=3.5V
V
CELL4
=4.4V,
V
CELL1
= V
CELL2
=
V
CELL3
=3.5V
V
DH
V
DL
V
CH
I
UD1
V
CC
-0.15V V
CC
-0.03V
V
0.15
V
V
mA
0.01
V
CC
+0.4 V
CC
+0.55
6.5
9.3
12.1
I
UD2
6.3
9.0
11.7
mA
I
UD3
6.2
8.8
11.4
mA
I
UD4
6.4
9.2
12.0
mA
Note: V
CELL
means the battery cell voltage. Therefore,
V
CELL1
= V
CC
– V
C1
V
C
ELL2
= V
C1
– V
C2
V
CELL3
= V
C2
– V
C3
V
CELL4
= V
C3
4
AIC1804
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
=25°C
Vcc Pin Power-Down Current (
µ
A)
22
2.2
2.0
1.8
1.6
1.4
1.2
1.0
Vcc Pin Input Current (
µ
A)
T
A
=25°C
20
18
16
14
10.4
11.2
12.0
12.8
13.6
14.4
15.2
16.0
6.0
Supply Voltage (V)
Fig. 1 Vcc Pin Input Current vs. Supply Voltage
Supply Voltage (V)
Fig. 2 Vcc Pin Power-Down Current vs. Supply Voltage
6.4
6.8
7.2
7.6
8.0
8.4
8.8
9.2
22
3.0
Vcc Pin Input Current (
µ
A)
V
CELL
=3.5V
20
Vcc Pin Power-Down Current (uA)
2.8
2.6
V
CELL
=2.3V
2.4
2.2
2.0
1.8
1.6
-20
18
16
14
-20
-10
0
10
20
30
40
50
60
70
Temperature (°C)
Fig. 3 Vcc Pin Input Current vs. Temperature
Temperature (°C)
Fig. 4 Vcc Pin Power-Down Current vs. Temperature
-10
0
10
20
30
40
50
60
70
AIC1804C
4.28
Overdischarge Protection Voltage (V)
4.30
2.42
2.41
2.40
2.39
2.38
Overcharge Protection Voltage (V)
4.26
4.24
4.22
2.37
2.36
4.20
-20
0
20
40
60
70
Temperature (°C)
Fig. 5 Overcharge Protection Voltage vs. Temperature
-20
-10
0
10
20
30
40
50
60
70
Temperature (°C)
Fig. 6 Overdischarge Protection Voltage vs. Temperature
5
Making friends through disassembly
京公网安备 11010802033920号
EEWORLD
