S-8232 Series
BATTERY PROTECTION IC
FOR 2-SERIAL-CELL PACK
Rev.6.1
_00
www.sii-ic.com
© Seiko Instruments Inc., 1999-2011
The S-8232 series is a lithium-ion / lithium-polymer rechargeable battery protection IC incorporating high-
accuracy voltage detection circuit and delay circuit.
The S-8232 series is suitable for 2-cell serial lithium-ion / lithium-polymer battery packs.
Features
(1) Internal high-accuracy voltage detection circuit
•
Overcharge detection voltage
3.85 V
±
25 mV to 4.60 V
±
25 mV
Applicable in 5 mV step
•
Overcharge release voltage
3.60 V
±
50 mV to 4.60 V
±
50 mV
Applicable in 5 mV step
(The overcharge release voltage can be selected within the range where a difference from overcharge
detection voltage is 0 V to 0.3 V.)
•
Overdischarge detection voltage 1.70 V
±
80 mV to 2.60 V
±
80 mV
Applicable in 50 mV step
•
Overdischarge release voltage
1.70 V
±
100 mV to 3.80 V
±
100 mV Applicable in 50 mV step
(The overdischarge release voltage can be selected within the range where a difference from
overdischarge detection voltage is 0 V to 1.2 V.)
•
Overcurrent detection voltage 1 0.07 V
±
20 mV to 0.30 V
±
20 mV
Applicable in 5 mV step
(2) High input-voltage device : Absolute maximum ratings 18 V.
(3) Wide operating voltage range : 2.0 V to 16 V
(4) 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) Two overcurrent detection levels (Protection for short-circuiting)
(6) Internal auxiliary over voltage detection circuit (Fail-safe for overcharge detection voltage)
(7) Internal charge circuit for 0 V battery (Unavailable is option)
(8) Low current consumption
•
Operation mode
7.5
μA
typ. 14.2
μA
max. (− 40°C to
+
85°C)
•
Power-down mode 0.2 nA typ. 0.1
μA
max. (− 40°C to
+
85°C)
*1
(9) Lead-free, Sn100%, halogen-free
*1.
Refer to “
Product Name Structure”
for details.
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium- polymer rechargeable battery packs
Package
•
8-Pin TSSOP
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S8232 Series
Block Diagram
Rev.6.1
_00
VCC
SENS
Reference
voltage 1
−
+
−
+
−
+
Auxiliary
overcharge
detector 1
Overcharge
detector 1
Over-
discharge
detector 1
Control
logic
Delay circuit
control signal
DO
VC
Over-
discharge
detector 2
Overcharge
detector 2
Delay circuit control signal
Delay circuit
control signal
CO
RCOL
+
−
+
−
+
−
Over current
detection circuit
Delay circuit
control signal
Delay circuit
DO, CO control signal
VM
VSS
Auxiliary
overcharge
Reference
detector 2
voltage 2
ICT
Remark
Resistor (RCOL) is connected to the Nch transistor although CO pin serves as a CMOS output.
For this, impedance becomes high when outputting “L” from CO pin. Refer to the “
Electrical
Characteristics”
for the impedance value.
Figure 1
2
Seiko Instruments Inc.
Rev6.1
_00
Product Name Structure
1. Product Name
S-8232 xx FT - T2 - x
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8232 Series
Environmental code
U: Lead-free (Sn 100%), halogen-free
S: Lead-free, halogen-free
G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
Package code
FT : 8-Pin TSSOP
Serial code
Sequentially set from AA to ZZ
*1.
Refer to the tape specifications.
2. Package
Package Name
8-Pin TSSOP
Drawing Code
Tape
FT008-E-C-SD
Package
FT008-A-P-SD
Reel
FT008-E-R-SD
Seiko Instruments Inc.
3
Rev6.1
_00
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8232 Series
Table 1 (2 / 2)
Overcharge
detection
voltage 1, 2
[V
CU
]
4.28 V
±
25 mV
4.295 V
±
25 mV
4.25 V
±
25 mV
4.25 V
±
25 mV
4.15 V
±
25 mV
4.15 V
±
25 mV
4.225 V
±
25 mV
3.85 V
±
25 mV
4.21 V
±
25 mV
4.25 V
±
25 mV
4.25 V
±
25 mV
4.21 V
±
25 mV
4.305 V
±
25 mV
4.35 V
±
25 mV
4.21 V
±
25 mV
4.225 V
±
25 mV
Overcharge
release voltage 1, 2
[V
CD
]
4.08 V
±
50 mV
*3
4.045 V
±
50 mV
*3
Product name
Overdischarge
detection
voltage 1, 2
[V
DD
]
2.20 V
±
80 mV
2.20 V
±
80 mV
2.30 V
±
80 mV
2.60 V
±
80 mV
2.60 V
±
80 mV
2.30 V
±
80 mV
2.00 V
±
80 mV
2.23 V
±
80 mV
2.00 V
±
80 mV
2.80 V
±
80 mV
2.90 V
±
80 mV
2.30 V
±
80 mV
2.00 V
±
80 mV
2.30 V
±
80 mV
2.40 V
±
80 mV
2.70 V
±
80 mV
Overdischarge
release
voltage1, 2
[V
DU
]
2.40 V
±
100 mV
2.40 V
±
100 mV
3.00 V
±
100 mV
3.00 V
±
100 mV
3.00 V
±
100 mV
3.00 V
±
100 mV
2.00 V
±
80 mV
2.23 V
±
80 mV
2.00 V
±
80 mV
3.10 V
±
100 mV
3.10 V
±
100 mV
2.90 V
±
100 mV
2.00 V
±
80 mV
3.00 V
±
100 mV
3.00 V
±
100 mV
3.40 V
±
100 mV
S-8232NNFT-T2-x
S-8232NOFT-T2-x
S-8232NPFT-T2-x
S-8232NQFT-T2-x
S-8232NRFT-T2-x
S-8232NSFT-T2-x
S-8232NTFT-T2-x
S-8232NUFT-T2-x
S-8232NWFT-T2-x
S-8232NXFT-T2-x
S-8232NYFT-T2-x
S-8232NZFT-T2-x
S-8232PAFT-T2-x
S-8232PBFT-T2-y
S-8232PCFT-T2-x
S-8232PFFT-T2-U
Overcharge
detection
0 V battery
delay time
charging
[t
CU
]
function
(C3
=
0.22
μF)
0.13 V
±
20 mV
1.0 s
Unavailable
Overcurrent
detection
voltage 1
[V
IOV1
]
0.13 V
±
20 mV
0.30 V
±
20 mV
0.30 V
±
20 mV
0.30 V
±
20 mV
0.30 V
±
20 mV
0.09 V
±
20 mV
0.15 V
±
20 mV
0.09 V
±
20 mV
0.30 V
±
20 mV
0.30 V
±
20 mV
0.11 V
±
20 mV
0.09 V
±
20 mV
0.20 V
±
20 mV
0.20 V
±
20 mV
0.15 V
±
20 mV
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
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Available
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
4.05 V
±
50 mV
4.05 V
±
50 mV
3.95 V
±
50 mV
3.95 V
±
50 mV
4.15 V
±
50 mV
3.75 V
±
50 mV
4.125 V
±
50 mV
4.05 V
±
50 mV
4.15 V
±
50 mV
3.98 V
±
50 mV
4.125 V
±
50 mV
4.15 V
±
50 mV
4.00 V
±
50 mV
*2
4.025 V
±
50 mV
*1.
*2.
*3.
*4.
No overcharge detection / release hysteresis
The magnification of final overcharge is 1.11; the others are 1.25.
No final overcharging function
Refer to the
*2
in the “
Operation”.
Remark 1.
Please contact our sales office for the products with detection voltage value other than those
specified above.
2.
x: G or U
y: S or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
4.
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”.
Table 2
Overdischarge
detection voltage 1, 2
[V
DD
]
1.70 V to 2.60 V
1.70 V to 2.80 V
1.70 V to 3.00 V
Overcharge
detection voltage 1, 2
[V
CU
]
3.85 V to 4.60 V
3.85 V to 4.60 V
3.85 V to 4.50 V
Voltage difference between overcharge detection
voltage and overcharge release voltage
[V
CU
−
V
CD
]
0 V to 0.30 V
0 V to 0.20 V
0 V to 0.10 V
Seiko Instruments Inc.
5
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