S-8209B Series
www.sii-ic.com
© Seiko Instruments Inc., 2008-2015
BATTERY PROTECTION IC
WITH CELL-BALANCE FUNCTION
Rev.3.4
_00
The S-8209B Series is a protection IC for lithium-ion / lithium polymer rechargeable batteries and includes a high-accuracy
voltage detection circuit and a delay circuit.
The S-8209B Series has a transmission function and two types of cell-balance function so that users are also able to configure
a protection circuit with series multi-cell.
Features
•
High-accuracy voltage detection circuit
*1
3.55 V to 4.40 V (5 mV step)
Overcharge detection voltage
*1
Overcharge release voltage
3.50 V to 4.40 V
*2
Cell-balance detection voltage
*1
3.55 V to 4.40 V (5 mV step)
*3
Cell-balance release voltage
*1
3.50 V to 4.40 V
*4
Overdischarge detection voltage
2.0 V to 3.0 V (10 mV step)
*5
Overdischarge release voltage
2.0 V to 3.4 V
•
Settable delay time by external capacitor for output pin
•
Control charging, discharging, cell-balance by CTLC pin, CTLD pin
•
Two types of cell-balance function; charge / discharge
*6
•
Wide range of operation temperature
Ta =
−40°C
to
+85°C
•
Low current consumption
7.0
μA
max.
*7
•
Lead-free, Sn 100%, halogen-free
Accuracy
±25
mV
Accuracy
±50
mV
Accuracy
±25
mV
Accuracy
±50
mV
Accuracy
±50
mV
Accuracy
±100
mV
*1.
Regarding selection of overcharge detection voltage, overcharge release voltage, cell-balance detection voltage
and cell-balance release voltage, refer to
Remark 3
in "3.
Product name list"
of "
Product Name Structure".
*2.
Overcharge release voltage = Overcharge detection voltage
−
Overcharge hysteresis voltage
(Overcharge hysteresis voltage is selectable in 0 V to 0.4 V in 50 mV step.)
*3.
Select as to overcharge detection voltage
>
cell-balance detection voltage.
*4.
Cell-balance release voltage = Cell-balance detection voltage
−
Cell-balance hysteresis voltage
(Cell-balance hysteresis voltage is selectable in 0 V to 0.4 V in 50 mV step.)
*5.
Overdischarge release voltage = Overdischarge detection voltage
+
Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage is selectable in 0 V to 0.7 V in 100 mV step.)
*6.
Also available the product without discharge cell-balance function
*7.
Refer to "
Product Name Structure"
for details.
Applications
•
Lithium-ion rechargeable battery pack
•
Lithium polymer rechargeable battery pack
Packages
•
SNT-8A
•
8-Pin TSSOP
Seiko Instruments Inc.
1
BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION
S-8209B Series
Block Diagram
Rev.3.4
_00
Delay circuit
DO
8.31 MΩ
CDT
CO
VDD
+
Overcharge
detection
comparator
+
−
Cell-balance
detection
comparator
CTLD
400 nA
+
−
CTLC
400 nA
Overdischarge
detection
comparator
VSS
−
CB
Remark
The diodes in the IC are parasitic diodes.
Figure 1
2
Seiko Instruments Inc.
Rev.3.4
_00
BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION
S-8209B Series
Product Name Structure
1. Product name
1. 1 8-Pin TSSOP
S-8209B
xx
-
T8T1
x
Environmental code
U: Lead-free (Sn 100%), halogen-free
S: Lead-free, halogen-free
Package name abbreviation and IC packing specifications
T8T1: 8-Pin TSSOP, Tape
Serial code
Sequentially set from AA to ZZ
*1
*1.
Refer to the tape drawing.
1. 2 SNT-8A
S-8209B
xx
-
I8T1
U
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package name abbreviation and IC packing specifications
I8T1: SNT-8A, Tape
Serial code
Sequentially set from AA to ZZ
*1
*1.
Refer to the tape drawing.
2. Packages
Table 1 Package Drawing Codes
Package Name
8-Pin TSSOP
SNT-8A
Environmental code = S
Environmental code = U
Dimension
FT008-A-P-SD
FT008-A-P-SD
PH008-A-P-SD
Tape
FT008-E-C-SD
FT008-E-C-SD
PH008-A-C-SD
Reel
FT008-E-R-SD
FT008-E-R-S1
PH008-A-R-SD
Land
−
PH008-A-L-SD
Seiko Instruments Inc.
3
BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION
S-8209B Series
3. Product name list
3. 1 8-Pin TSSOP
Table 2
Overcharge
Detection
Voltage
(V
CU
)
4.100 V
4.150 V
3.800 V
4.250 V
4.250 V
4.150 V
4.215 V
4.300 V
4.250 V
Overcharge
Release
Voltage
(V
CL
)
4.000 V
3.950 V
3.650 V
4.150 V
4.150 V
3.950 V
4.215 V
4.100 V
4.150 V
Cell-balance
Detection
Voltage
(V
BU
)
4.050 V
3.900 V
3.700 V
4.200 V
4.100 V
3.900 V
4.190 V
4.225 V
4.200 V
Cell-balance
Release
Voltage
(V
BL
)
4.000 V
3.900 V
3.700 V
4.200 V
4.050 V
3.900 V
4.190 V
4.225 V
4.200 V
Rev.3.4
_00
Product Name
S-8209BAA-T8T1y
S-8209BAD-T8T1y
S-8209BAG-T8T1y
S-8209BAH-T8T1y
S-8209BAI-T8T1y
S-8209BAJ-T8T1y
S-8209BAK-T8T1y
S-8209BAL-T8T1y
S-8209BAN-T8T1U
3. 2 SNT-8A
Overdischarge Overdischarge Discharge
Detection
Release
Cell-balance
Voltage
Voltage
Function
(V
DL
)
(V
DU
)
Yes
2.50 V
2.70 V
Yes
2.00 V
2.70 V
No
2.20 V
2.50 V
No
2.50 V
2.80 V
Yes
2.50 V
2.70 V
No
2.30 V
3.00 V
Yes
2.00 V
2.50 V
Yes
2.00 V
2.50 V
2.00 V
2.10 V
No
Table 3
Overcharge
Detection
Voltage
(V
CU
)
4.100 V
4.000 V
Overcharge
Release
Voltage
(V
CL
)
4.000 V
3.800 V
Cell-balance
Detection
Voltage
(V
BU
)
4.050 V
3.900 V
Cell-balance
Release
Voltage
(V
BL
)
4.000 V
3.850 V
Overdischarge Overdischarge Discharge
Detection
Release
Cell-balance
Voltage
Voltage
Function
(V
DL
)
(V
DU
)
Yes
2.50 V
2.70 V
No
3.00 V
3.40 V
Product Name
S-8209BAA-I8T1U
S-8209BAM-I8T1U
Remark 1.
y: S or U
2.
Please select products of environmental code = U for Sn 100%, halogen-free products.
4
Seiko Instruments Inc.
Rev.3.4
_00
3.
BATTERY PROTECTION IC WITH CELL-BALANCE FUNCTION
S-8209B Series
Please contact our sales office for the products with detection voltage value other than those specified
above.
Users are able to select the overcharge detection voltage, overcharge release voltage, cell-balance
detection voltage and cell-balance release voltage from the range shown in
Figure 2
and
Figure 3.
Users are able to select how to combine the overcharge detection voltage (V
CU
) and the overcharge release
*1
voltage (V
CL
) from the range A or B shown in
Figure 2
.
Similarly, select how to combine the cell-balance detection voltage (V
BU
) and the cell-balance release
*2
voltage (V
BL
) from the range of C or D in
Figure 3
.
In selecting the combination of V
CU
and V
CL
from the range A, select the combination of V
BU
and V
BL
from
the range C. Similarly, in selecting the combination of V
CU
and V
CL
from the B range, select the combination
*3
of V
BU
and V
BL
from the range D .
4.40
4.40
4.20
Cell-balance detection voltage (V
BU
) [V]
Overcharge detection voltage (V
CU
) [V]
A
4.20
C
3.90
B
3.90
D
3.55
3.55
3.50 3.55
3.80 3.90 4.00
4.40
3.50 3.55
3.80 3.90 4.00
4.40
Overcharge release voltage (V
CL
) [V]
Cell-balance release voltage (V
BL
) [V]
Figure 2
Figure 3
*1.
Users are able to select the overcharge hysteresis voltage (V
CU
−
V
CL
) in 0 V to 0.4 V, in 50 mV step.
*2.
Users are able to select the cell-balancce hysteresis voltage (V
BU
−
V
BL
) in 0 V to 0.4 V, in 50 mV step.
*3.
Select as to set V
CU
>
V
BU
.
Seiko Instruments Inc.
5
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