Rev.6.1
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
4.00 V
±
25 mV to 4.60 V
±
25 mV
5 mV- step
Overcharge release voltage
3.70 V
±
50 mV to 4.60 V
±
50m V
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
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
50 mV - step
(The overdischarge release voltage can be selected within the range where a difference from
overdischarge detection voltage is 0 to 1.0V)
Overcurrent detection voltage 1
(2)
(3)
(4)
(5)
0.06 V
±
20 mV to 0.30 V
±
20 mV
5 mV-step
High input-voltage device (absolute maximum rating: 18 V)
Wide operating voltage range:
Wide operating range:
1.5 V to 16 V
-40 to +85
°C
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.″ or
″Proportion
of fifty to ten to One.″
(6)
(7)
(8)
(9)
Two overcurrent detection levels (protection for short-circuiting)
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)
(10)
MSOP package (8-pin) 4.0 mm×2.95 mm
Applications
Lithium-ion rechargeable battery packs
Seiko Instruments Inc.
1
Battery Protection IC (for a single-cell pack)
S-8231 Series
Rev.6.1
Selection Guide(6, Aug, 1999)
A / N series
Model
Item
Overcharge
detection
voltage
Table1
Overcharge Overdischarg Overdischarge
release
e detection
release
voltage
voltage
voltage
Overcurrent
detection
voltage1
Overcharge
detection
delay
(C2=0.047
µ⋅F)
1.0 sec
1.0 sec
0.5 sec
0.5 sec
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
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
2.30V±80mV 2.70V±100mV 0.150V±20mV
Available
Available
Unavailable
Unavailable
Available
Available
Available
Available
Available
Available
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Available
Available
Unavailable
Unavailable
Unavailable
Available
Unavailable
Unavailable
Available
Unavailable
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
4.295V±25mV 4.20±50mV 2.50V±80mV 3.00V±100mV 0.150V±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
S-8231AOFN-CAO-T2 4.295V±25mV 4.295V *1 2.30V±80mV 3.00V±100mV 0.300V±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
4.12V±25mV
4.12V *1
2.30V±80mV 2.50V±100mV 0.200V±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
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
4.25V±25mV 4.05±50mV 2.30V±80mV 2.70V±100mV 0.130V±20mV
4.20V±25mV 4.07±50mV 2.50V±80mV 2.75V±100mV 0.200V±20mV
Seiko Instruments Inc.
Rev.6.1
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
release voltage
detection
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
Unavailabl
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) Without overcharge detection / release hysteresis.
*2) Discharging will be unable when overcharge 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.
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.
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
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
Seiko Instruments Inc.
Battery Protection IC (for a single-cell pack)
S-8231 Series
Rev.6.1
Block Diagram
VCC
SENS
DO
Over discharge
+
-
Over charge
Control
logic
CO
+
-
Delay circuit
control signal
RCOL
+
Reference
voltage
Over current
detection circuit
Delay circuit
control signal
Delay
circuit
VM
-
-
Auxiliary
Over charge
Delay circuit
control signal
Control signal
VSS
ICT
Figure 1
Output impedance when CO terminal output ‘L’ is higher than DO terminal. Resistor (RCOL) is connected
with CO terminal. Please refer ‘Electric Characteristics’.
Seiko Instruments Inc.
Rev.6.1
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
VM
VSS
ICT
NC
VCC
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)
Negative power input
Connects capacitor for every detection delay circuit
Non connect
Positive power input and connects battery positive voltage
ICT
VSS
3
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
CO output terminal voltage
Power dissipation
Operating temperature range
Storage temperature range
Sym.
VDS
VICT
VVM
VDO
VCO
PD
Topr
Tstg
Applied Pins
VCC
ICT
VM
DO
CO
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
Ta = 25°C
Unit
V
V
V
V
V
mW
°C
°C
Seiko Instruments Inc.
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