Rev.3.2
_10
BATTERY PROTECTION IC (FOR A 2-SERIAL-CELL PACK)
S-8232 Series
The 8232 is a series of lithium-ion rechargeable battery protection
ICs incorporating high-accuracy voltage detection circuits and
delay circuits.
The S-8232 is suitable for a 2-serial-cell lithium-ion battery pack.
Features
(1)
Internal high-accuracy voltage detection circuit
Overcharge detection voltage
Overcharge release voltage
3.90 V
±
25 mV to 4.60 V
±
25 mV
5 mV- step
3.60 V
±
50 mV to 4.60 V
±
50 mV
5 mV- step
(The Overcharge release voltage can be selected within the range where a difference from
Overcharge detection voltage is 0 to 0.3 V)
Overdischarge detection voltage
Overdischarge release voltage
1.70 V
±
80 mV to 2.60 V
±
80 mV
50 mV- step
1.70 V
±
100 mV to 3.80 V
±
100 mV
50 mV - step
(The Overdischarge release voltage can be selected within the range where a difference from
Overdischarge detection voltage is 0 to 1.2 V)
Overcurrent detection voltage 1
0.07 V
±
20 mV to 0.30 V
±
20 mV
5 mV-step
(2)
(3)
(4)
High input-voltage device (absolute maximum rating: 18 V)
Wide operating voltage range:
2.0 V to 16 V
The delay time for every detection can be set via an external capacitor.
Each delay time for Overcharge detection, Overdischarge detection, Overcurrent detection are
“Proportion of hundred to ten to one.”
(5)
(6)
(7)
(8)
Two overcurrent detection levels (protection for short-circuiting)
Internal auxiliary over voltage detection circuit (Fail safe for over voltage)
Internal charge circuit for 0 V battery (Unavailable is option)
Low current consumption
Operation
Power-down mode
(9)
7.5
µA
typ. 14.2
µA
max (−40 to
+85 °C)
0.2 nA typ. 0.1
µA
max (−40 to
+85 °C)
TSSOP package (8-pin) 6.4 mm×3.1 mm
Applications
Lithium-ion rechargeable battery packs
Package
8-PinTSSOP (PKG code:FT008-A)
Seiko Instruments Inc.
1
Battery Protection IC (for a 2-serial-cell pack)
S-8232 Series
Rev. 3.2
_10
Selection Guide (01 .Nov ,2001)
Table1
Model/Item
Overcharge
detection
voltage1,2
(V
CU1,2
)
4.25V±25mV
4.35V±25mV
4.35V±25mV
4.35V±25mV
4.25V±25mV
4.25V±25mV
4.25V±25mV
4.325V±25mV
4.25V±25mV
4.20V±25mV
4.30V±25mV
4.19V±25mV
4.325V±25mV
4.30V±25mV
4.28V±25mV
4.325V±25mV
4.295V±25mV
4.125V±25mV
4.30V±25mV
4.30V±25mV
4.35V±25mV
4.325V±25mV
4.30V±25mV
4.30V±25mV
4.325V±25mV
Overdischarge
Overcharge
detection
release voltage1,2
voltage1,2
(V
CD1,2
)
(V
DD1,2
)
4.05±50mV
4.15±50mV
4.15±50mV
4.28±50mV
4.05±50mV
4.05±50mV
4.05±50mV
4.325V±25mV
1),2)
4.05±50mV
4.00±50mV
4.05±50mV
4.19 V±25mV
1)
Overdischarge
release
voltage1,2
(V
DU1,2
)
3.00V±100mV
3.00V±100mV
3.00V±100mV
2.80V±100mV
2.70V±100mV
2.40V±100mV
2.40V±100mV
3.00V±100mV
3.00V±100mV
2.90V±100mV
3.00V±100mV
3.00V±100mV
3.00V±100mV
3.00V±100mV
2.90V±100mV
2.50V±100mV
3.00V±100mV
3.00V±100mV
3.00V±100mV
3.00V±100mV
3.00V±100mV
3.00V±100mV
2.00V±80mV
2.30V±80mV
3.00V±100mV
Overcurrent
detection
voltage1
(V
IOV1
)
0.150V±20mV
0.300V±20mV
0.300V±20mV
0.100V±20mV
0.300V±20mV
0.200V±20mV
0.300V±20mV
0.300V±20mV
0.150V±20mV
0.200V±20mV
0.200V±20mV
0.190V±20mV
0.300V±20mV
0.230V±20mV
0.100V±20mV
0.300V±20mV
0.300V±20mV
0.190V±20mV
0.200V±20mV
0.300V±20mV
0.150V±20mV
0.20V±20mV
0.20V±20mV
0.20V±20mV
0.15V±20mV
Overcharge
0 V battery
detection delay charging
time (t
CU
)
function
C3=0.22
µ
F
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
1.0 s
Available
Available
Unavailable
Available
Available
Available
Available
Unavailable
Unavailable
Available
Available
Available
Unavailable
Available
Unavailable
Unavailable
Unavailable
Available
Unavailable
Available
Unavailable
Unavailable
Available
Available
Unavailable
S-8232AAFT
S-8232ABFT
S-8232ACFT
S-8232AEFT
S-8232AFFT
S-8232AGFT
S-8232AHFT
S-8232AIFT
S-8232AJFT
S-8232AKFT
S-8232ALFT
S-8232AMFT
S-8232ANFT
S-8232AOFT
S-8232APFT
S-8232ARFT
S-8232ASFT
4)
S-8232ATFT
S-8232AUFT
S-8232AVFT
S-8232AWFT
S-8232AXFT
S-8232AYFT
S-8232AZFT
S-8232NAFT
1):
2):
3):
4):
2.40V±80mV
2.30V±80mV
2.30V±80mV
2.15V±80mV
2.30V±80mV
2.20V±80mV
2.20V±80mV
2.40V±80mV
2.40V±80mV
2.30V±80mV
2.00V±80mV
2.00V±80mV
2.40V±80mV
2.00V±80mV
2.30V±80mV
2.00V±80mV
2.30V±80mV
2.00V±80mV
2.40V±80mV
2.00V±80mV
2.30V±80mV
2.30V±80mV
2.00V±80mV
2.30V±80mV
2.40V±80mV
4.325V±25mV
1),3)
4.05±50mV
4.05±50mV
4.325V±25mV
1),3)
4.20±50mV
3)
4.125±25mV
1)
4.10±50mV
4.05V±50mV
4.15V±50mV
4.200V±50mV
4.05V±50mV
4.05V±50mV
4.325V±25mV
1)
No overcharge detection/release hysteresis
The magnification of final overcharge is 1.11; other is 1.25.
No final overcharging function
Refer to the Description of Operation (*3).
Change in the detection voltage is available. Please contact SII sales office.
The overdischarge detection voltage can be selected within the range from 1.7 to 3.0 V.
When the overdischarge detection voltage is higher than 2.6 V, the overcharge detection voltage and the
overcharge release voltage are limited as table 2.
Overdischarge detection
voltage1,2 (V
DD1,2
)
1.70 to 2.60 V
1.70 to 2.80 V
1.70 to 3.00 V
Table 2
Overcharge detection
Voltage difference between overcharge detection voltage
voltage1,2 (V
CU1,2
)
and overcharge release voltage (V
CU1,2
- V
CD1,2
)
3.90 to 4.60 V
3.90 to 4.60 V
3.90 to 4.50 V
0 to 0.30 V
0 to 0.20 V
0 to 0.10 V
2
Seiko Instruments Inc.
Rev. 3.2
_10
Block Diagram
Battery Protection IC (for a 2-serial-cell pack)
S-8232 Series
VCC
Reference
voltage 1
SENS
Auxiliary
Over
charge
detector 1
-
+
-
+
-
+
Over charge
detector 1
DO
Control
Logic
Delay circuit
control signal
Over discharge
detector 1
VC
CO
Over discharge
detector 2
R
COL
+
-
+
-
+
-
Over charge
detector 2
Over current
detection
circuit
Delay circuit
control signal
Delay circuit
control signal
Delay circuit
control signal
Delay circuit
DO,CO control signal
VM
VSS
Auxiliary
Over charge
Reference detector 2
voltage 2
ICT
Figure 1
Output impedance when CO terminal output ‘L’ is higher than DO terminal. R
COL
resistor is connected with CO
terminal. Please refer ‘Electric Characteristics’.
Seiko Instruments Inc.
3
Battery Protection IC (for a 2-serial-cell pack)
S-8232 Series
Rev. 3.2
_10
Pin Assignment
Top View
1
2
3
4
8
7
6
5
TSSOP-8
Figure 2
Pin Description
Table 3
No.
1
2
3
4
Name
SENS
DO
CO
VM
Description
Detection pin for voltage between SENS and VC (Detection for
overcharge and overdischarge)
FET gate connection pin for discharge control (CMOS output)
FET gate connection pin for charge control (CMOS output)
Detection pin for voltage between VM and VSS (Overcurrent detection
pin)
5
6
7
8
VSS
ICT
VC
VCC
Negative power input pin
Capacitor connection pin for detection delay
Middle voltage input pin
Positive power input pin
Absolute Maximum Ratings
Table 4
Item
Input voltage between VCC and VSS
SENS Input terminal voltage
ICT Input terminal voltage
VM Input terminal voltage
DO output terminal voltage
CO output terminal voltage
Power dissipation
Operating temperature range
Storage temperature range
Symbol
V
DS
V
SENS
V
ICT
V
VM
V
DO
V
CO
P
D
T
opr
T
stg
Applied Pins
VCC
SENS
ICT
VM
DO
CO
Rating
V
SS
−0.3
to V
SS
+18
V
SS
−0.3
to V
CC
+0.3
V
SS
−0.3
to V
CC
+0.3
V
CC
−18
to V
CC
+0.3
V
SS
−0.3
to V
CC
+0.3
V
VM
−0.3
to V
CC
+0.3
300
−40
to
+85
−40
to
+125
Ta
=
25°C
Unit
V
V
V
V
V
V
mW
°C
°C
4
Seiko Instruments Inc.
Rev. 3.2
_10
Battery Protection IC (for a 2-serial-cell pack)
S-8232 Series
Electrical Characteristics
Table 5
Item
Detection voltage
Overcharge detection voltage 1,2
Symbol
Condition Circuit
Unless otherwise noted, Ta
=
25°C
Notice
Min.
V
CU1,2
−0.025
V
CU1,2
×1.21
Typ.
V
CU1,2
V
CU1,2
×1.25
V
CU1,2
×1.11
V
CD1,2
V
DD1,2
V
DU1,2
V
IOV1
−1.20
0
−0.05
Max.
V
CU1,2
+0.025
V
CU1,2
×1.29
V
CU1,2
×1.15
V
CD1,2
+0.050
V
DD1,2
+0.080
V
DU1,2
+0.100
V
IOV1
+0.020
−0.83
0.6
0
Unit
V
V
V
CU1,2
1,2
1,2
1
1
Auxiliary
overcharge
detection V
CUaux1,2
voltage 1,2
(4)
V
CUaux
1,2
=
V
CU1,2
×1.25
or
V
CUaux1,2
V
CUaux
1,2
=
V
CU1,2
×1.11
Overcharge release voltage 1,2
V
CD1,2
Overdischarge detection voltage
1,2
Overdischarge release voltage 1,2
Overcurrent detection voltage 1
Overcurrent detection voltage 2
Temperature coefficient 1 for
detection voltage
(1)
Temperature coefficient 2 for
detection voltage
(2)
Delay time (C3=0.22
µ
F)
Overcharge detection
delay time1,2
Overdischarge detection
delay time 1,2
Overcurrent detection delay time1
Input voltage
Input voltage between
VCC and VSS
Operating voltage
Operating voltage between VCC
and VSS
(3)
Current consumption
Current consumption
during normal operation
Current consumption
at power down
Output voltage
DO”H”voltage
DO”L”voltage
CO”H”voltage
CO pin internal resistance
Resistance between VSS and CO
Internal resistance
Resistance between VCC and VM
Resistance between VSS and VM
0 V battery charging function
0 V charge starting voltage
0 V charge inhibiting voltage 1,2
(1)
(2)
(3)
(4)
V
DD1,2
V
DU1,2
V
IOV1
V
IOV2
T
COE1
T
COE2
Between 3.90 and
4.60
V
CU1,2
×1.25
1,2
1,2
1,2
1,2
3
3
1
1
1
1
1
1
V
CU1,2
×1.07
Between 3.60 and
V
CD1,2
4.60
−0.050
Between 1.70 and
V
DD1,2
2.60
−0.080
Between 1.70 and
V
DU1,2
3.80
−0.100
Between 0.07 to 0.30 V
IOV1
−0.020
V
CC
Reference
−1.57
Ta=−40 to 85°C
−0.6
Ta=−40 to 85°C
−0.24
V
CU1,2
×1.11
V
V
V
V
V
V
mV/°C
mV/°C
t
CU1,2
t
DD1,2
t
IOV1
V
DS
8,9
8,9
10
5
5
5
1.0 s
0.1 s
0.01 s
Absolute maximum
rating
0.73
68
6.7
−0.3
2.0
1.00
100
10
−
−
1.35
138
13.9
18
16
s
ms
ms
V
DSOP
V
I
OPE
I
PDN
4
4
2
2
V1=V2=3.6 V
V1=V2=1.5 V
2.1
0
7.5
0.0002
12.7
0.04
µA
µA
V
DO(H)
V
DO(L)
V
CO(H)
R
COL
R
vcm
R
vsm
V
0CHA
V
0INH1,2
6
6
7
7
5
5
11
12,13
3
3
4
4
2
2
6
6
Iout=10
µA
Iout=10
µA
Iout=10
µA
V
CO
−V
SS
=9.4
V
Vcc−V
VM
=0.5
V
V
VM
−V
SS
=1.1
V
0 V battery charging
Available
0 V battery charging
Unavailable
V
CC
−0.05
V
SS
V
CC
−0.15
0.29
105
511
0.38
0.32
V
CC
−0.003
V
SS
+0.003
V
CC
−0.019
0.6
240
597
0.75
0.88
V
CC
V
SS
+0.05
V
CC
1.44
575
977
1.12
1.44
V
V
V
MΩ
kΩ
kΩ
V
V
Temperature coefficient 1 for detection voltage should be applied to overcharge detection voltage, overcharge release
voltage, overdischarge detection voltage, and overdischarge release voltage.
Temperature coefficient 2 for detection voltage should be applied to overcurrent detection voltage.
The DO and CO pin logic are established at the operating voltage.
Auxiliary overcharge detection voltage is equal to the overcharge detection voltage times 1.11 for the products without
overcharge hysteresis, and times 1.25 for other products.
Seiko Instruments Inc.
5
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