Rev.6.2_
00
BATTERY PROTECTION IC (FOR A SINGLE-CELL PACK)
S-8231 SERIES
The 8231 is a series of lithium-ion rechargeable battery protection ICs
incorporating high-accuracy voltage detection circuits and delay circuits.
It is suitable for a single-cell lithium-ion battery pack.
Features
(1)
Internal high-accuracy voltage detection circuit
Overcharge detection voltage
Overcharge release voltage
5 mV- step
(The Overcharge release voltage can be selected within the range where the difference from
Overcharge detection voltage is 0 to 0.3 V)
Overdischarge detection voltage
Overdischarge release voltage
PR
50 mV - step
(The overdischarge release voltage can be selected within the range where a difference from
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overdischarge detection voltage is 0 to 1.0V)
Overcurrent detection voltage 1
ED
(2)
(3)
(4)
(5)
High input-voltage device (absolute maximum rating: 18 V)
Wide operating voltage range:
Each delay time for Overcharge detection, Overdischarge detection, Overcurrent detection are
″Proportion
of hundred to ten to One.″ or
″Proportion
of fifty to ten to One.″
(7)
(8)
(9)
Internal auxiliary over voltage detection circuit (Fail safe for over voltage)
Internal charge circuit for 0V battery (Unavailable is option)
Low current consumption
Operation
7.5
µA
typ. 13.7
µA
max. (-40 to +85
°C)
Power-down mode 0.2 nA typ. 0.14
µA
max. (-40 to +85
°C)
MSOP package (8-pin) 4.0 mm×2.95 mm
(10)
Applications
Lithium-ion rechargeable battery packs
DI
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(6)
Two overcurrent detection levels (protection for short-circuiting)
ON
Wide operating temperature range:
The delay time for every detection can be set via an external capacitor.
Seiko Instruments Inc.
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5 mV-step
1.5 V to 16 V
-40 to +85
°C
4.00 V
±
25 mV to 4.60 V
±
25 mV
5 mV- step
3.70 V
±
50 mV to 4.60 V
±
50m V
1.70 V
±
80 mV to 2.50 V
±
80 mV
50 mV- step
1.70 V
±
100 mV to 3.50 V
±
100 mV
0.06 V
±
20 mV to 0.30 V
±
20 mV
1
Battery Protection IC (for a single-cell pack)
S-8231 Series
Rev.6.2_
00
Table1
Selection Guide(6, Aug, 1999)
A / N series
Model/Item
Overcharge
detection
voltage
Overcharge Overdischarg Overdischarge Overcurrent
release
e detection
release
detection
voltage
voltage
voltage
voltage1
Overcharge
detection
delay
(C2=0.047
µ⋅F)
1.0 sec
1.0 sec
0.5 sec
0.5 sec
0V battery
charging
function
Auxiliary
overcharge
detection vol.
Magnification
*3
1.24
1.24
1.24
1.24
1.24
1.24
1.24
1.24
1.24
1.24
1.10
1.24
1.24
1.10
1.24
1.24
1.10
1.24
1.24
1.24
1.24
Unavailable
1.24
1.24
1.24
Unavailable
1.24
S-8231AAFN-CAA-T2
S-8231ABFN-CAB-T2
S-8231ACFN-CAC-T2
S-8231ADFN-CAD-T2
S-8231AEFN-CAE-T2
S-8231AGFN-CAG-T2
S-8231AHFN-CAH-T2
S-8231AIFN-CAI-T2
S-8231AJFN-CAJ-T2
S-8231AKFN-CAK-T2
S-8231ALFN-CAL-T2
S-8231AMFN-CAM-T2
S-8231ANFN-CAN-T2
4.25V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.100V±20mV
4.35V±25mV 4.10±50mV 2.30V±80mV 3.00V±100mV 0.100V±20mV
4.25V±25mV 4.05±50mV 2.30V±80mV 2.50V±100mV 0.120V±20mV
4.25V±25mV 4.05±50mV 2.30V±80mV 2.50V±100mV 0.240V±20mV
4.25V±25mV 3.95±50mV 2.30V±80mV 3.00V±100mV 0.100V±20mV
4.25V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.150V±20mV
4.35V±25mV 4.28±50mV 2.30V±80mV 2.80V±100mV 0.100V±20mV
4.25V±25mV
4.05V *2
Available
Available
Unavailable
Unavailable
Available
2.30V±80mV 2.70V±100mV 0.150V±20mV
4.25V±25mV 4.05±50mV 2.30V±80mV 2.50V±100mV 0.120V±20mV
4.25V±25mV 4.05±50mV 2.30V±80mV 2.50V±100mV 0.240V±20mV
4.25V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.130V±20mV
4.35V±25mV 4.10±50mV 2.30V±80mV 3.00V±100mV 0.100V±20mV
PR
4.295V±25mV 4.20±50mV 2.50V±80mV 3.00V±100mV 0.150V±20mV
S-8231AQFN-CAQ-T2
S-8231ARFN-CAR-T2
S-8231ASFN-CAS-T2
S-8231ATFN-CAT-T2
S-8231AUFN-CAU-T2
S-8231AVFN-CAV-T2
4.20V±25mV 4.10±50mV 2.30V±80mV 2.50V±100mV 0.200V±20mV
4.20V±25mV 4.10±50mV 2.30V±80mV 2.50V±100mV 0.100V±20mV
ED
S-8231AOFN-CAO-T2 4.295V±25mV 4.295V *1 2.30V±80mV 3.00V±100mV 0.300V±20mV
4.35V±25mV 4.10±50mV 2.30V±80mV 3.00V±100mV 0.250V±20mV
4.28V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.130V±20mV
4.28V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.130V±20mV
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4.12V±25mV
4.12V *1
2.30V±80mV 2.50V±100mV 0.200V±20mV
S-8231AWFN-CAW-T2 4.28V±25mV 4.18±50mV 2.30V±80mV 2.90V±100mV 0.080V±20mV
S-8231AXFN-CAX-T2 4.295V±25mV 4.295V *1
S-8231NAFN-CDA-T2
S-8231NBFN-CDB-T2
S-8231NCFN-CDC-T2
S-8231NDFN-CDD-T2
S-8231NEFN-CDE-T2
2.30V±80mV 3.00V±100mV 0.300V±20mV
4.33V±25mV 4.28±50mV 2.30V±80mV 2.80V±100mV 0.100V±20mV
4.28V±25mV 3.98±50mV 2.30V±80mV 2.35V±100mV 0.125V±20mV
4.28V±25mV 4.18±50mV 2.30V±80mV 2.90V±100mV 0.060V±20mV
ON
4.20V±25mV 4.07±50mV 2.50V±80mV 2.75V±100mV 0.200V±20mV
SC
4.25V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.130V±20mV
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Seiko Instruments Inc.
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1.0 sec
1.0 sec
1.0 sec
1.0 sec
0.5 sec
0.5 sec
1.0 sec
1.0 sec
0.5 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
1.0 sec
Available
Available
Available
Available
Available
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Available
Available
Unavailable
Unavailable
Unavailable
Available
Unavailable
Unavailable
Available
Unavailable
Rev.6.2_
00
B series
Model/Item
Overcharge
detection
voltage
(0 to 50°C)
Overcharge
release
voltage
Battery Protection IC (for a single-cell pack)
S-8231 Series
Overdischarge Overdischarge
detection
release voltage
voltage
Overcurrent
detection
voltage1
Overcharge
detection
delay
(C2=0.047
µ⋅F)
1.0 sec
1.0 sec
1.0 sec
1.0 sec
0V battery
charging
function
Auxiliary
overcharge
detection vol.
Magnification
*3
1.24
1.24
1.24
1.24
S-8231BAFN-CCA-T2 4.18V±30mV 3.98V±50mV
S-8231BBFN-CCB-T2 4.18V±30mV 4.08V±50mV
S-8231BGFN-CCG-T2 4.28V±30mV 4.08V±50mV
S-8231BIFN-CCI-T2 4.28V±30mV 4.08V±50mV
2.60V±80mV
2.30V±80mV
2.60V±80mV
2.60V±80mV
2.90V±100mV
2.90V±100mV
2.90V±100mV
2.90V±100mV
0.110V±20mV
0.110V±20mV
0.080V±20mV
0.080V±20mV
Available
Available
Unavailable
Available
S-8231BKFN-CCK-T2 4.22V±30mV 4.22V *1
2.3 0V±80mV
2.30V *4
0.200V±20mV
0.5 sec
Available
Unavailable
*1) No hysteresis is set between overcharge detection and release.
*2) Charge and discharge are prohibited once overcharge is detected. (Overcharge lock type)
*3) Auxiliary overcharge detection voltage comes in three types, i.e., overcharge detection voltage (VCU) x 1. 24 times, overcharge
detection voltage (VCU) x 1.10 times, and no final overcharge detection function.
*4) No hysteresis is set between overdischarge detection and release.
Change in the detection voltage is available in products other than the above listed ones.
Please contact with our sales division.
Table 2
Overdischarge
detection voltage
(VDD)
1.70 to 2.50 V
1.70 to 2.70 V
1.70 to 3.00 V
Overcharge
detection voltage
(VCU)
4.00 to 4.60 V
4.00 to 4.50 V
4.00 to 4.35 V
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Seiko Instruments Inc.
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The overdischarge detection voltage can be selected within the range from 1.7 to 3.0V. When the
Overdischarge detection voltage is higher than 2.5V, the Overcharge detection voltage and the Overcharge
release voltage are limited as follows table.
Voltage difference between
Overcharge detection voltage and
Overcharge release voltage
0 to 0.30 V
0 to 0.20 V
0 to 0.10 V
OD
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3
Battery Protection IC (for a single-cell pack)
S-8231 Series
Rev.6.2_
00
Block Diagram
VCC
SENS
DO
Over discharge
+
-
Over charge
Control
logic
OD
UC
T
Over current
detection circuit
Delay
circuit
CO
+
-
+
-
-
Auxiliary
Over charge
RCOL
PR
Delay circuit
control signal
VM
Reference
voltage
VSS
ED
Delay circuit
control signal
Control signal
Delay circuit
control signal
ICT
Output impedance when CO terminal output ‘L’ is higher than DO terminal. Resistor (RCOL) is connected
with CO terminal. Please refer ‘Electric Characteristics’.
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Seiko Instruments Inc.
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Figure 1
Rev.6.2_
00
Battery Protection IC (for a single-cell pack)
S-8231 Series
Pin Assignment
Top View
SENS
DO
CO
VM
1
2
3
4
8
7
6
5
VCC
NC
Pin Description
Table.3
No.
1
Name
SENS
Description
Detects voltage between Vss to SENS(Overcharge/discharge
detection pin)
2
DO
CO
Connects FET gate for discharge control (CMOS output)
Connects FET gate for charge control (CMOS output)
Detects voltage between VSS to VM(Overcurrent detection pin)
VSS
4
5
6
7
8
Figure 2
MSOP - 8
Absolute Maximum Ratings
Table 4
Item
Input voltage between VCC and VSS
ICT input terminal voltage
VM input terminal voltage
DO output terminal voltage
Sym.
VDS
VICT
VVM
VDO
PR
Applied Pins
VCC
ICT
VM
OD
UC
T
VM
VSS
ICT
NC
Negative power input
Non connect
VCC
ICT
3
Connects capacitor for every detection delay circuit
Positive power input and connects battery positive voltage
Ta = 25°C
Rating
VSS-0.3 to VSS+18
VSS-0.3 to VCC+0.3
VCC-18 to VCC+0.3
VSS-0.3 to VCC+0.3
VM-0.3 to VCC+0.3
150
-40 to +85
-40 to +125
Unit
V
V
V
V
V
mW
°C
°C
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VCO
PD
Topr
Tstg
CO output terminal voltage
Power dissipation
Operating temperature range
Storage temperature range
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DO
CO
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