S-8254A Series
BATTERY PROTECTION IC
FOR 3-SERIAL- OR 4-SERIAL-CELL PACK
Rev.5.1
_00
www.sii-ic.com
© Seiko Instruments Inc., 2002-2014
The S-8254A Series is a protection IC for 3-serial- or 4-serial-cell lithium-ion / lithium polymer rechargeable
batteries and includes a high-accuracy voltage detector and delay circuit.
The S-8254A Series protects both 3-serial or 4-serial cells using the SEL pin for switching.
Features
(1) High-accuracy voltage detection for each cell
•
Overcharge detection voltage n (n
=
1 to 4)
3.9 V to 4.4 V (50 mV step)
Accuracy
±25
mV
*1
Accuracy
±50
mV
•
Overcharge release voltage n (n
=
1 to 4)
3.8 V to 4.4 V
•
Overdischarge detection voltage n (n
=
1 to 4) 2.0 V to 3.0 V (100 mV step)
Accuracy
±80
mV
*2
Accuracy
±100
mV
•
Overdischarge release voltage n (n
=
1 to 4)
2.0 V to 3.4 V
(2) Three-level overcurrent protection
•
Overcurrent detection voltage 1
0.05 V to 0.30 V (50 mV step) Accuracy
±25
mV
•
Overcurrent detection voltage 2
0.5 V
Accuracy
±100
mV
Accuracy
±300
mV
•
Overcurrent detection voltage 3
V
VC1
−
1.2 V
(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set
by external capacitors (delay times for overcurrent detection 2 and 3 are fixed internally).
(4) Switchable between a 3-serial cell and 4-serial cell using the SEL pin
(5) Charge/discharge operation can be controlled via the control pins.
(6) High-withstand voltage device
Absolute maximum rating : 26 V
(7) Wide operating voltage range
2 V to 24 V
(8) Wide operating temperature range
−40°C
to
+
85°C
(9) Low current consumption
•
During operation
30
μA
max. (+25°C)
•
During power-down 0.1
μA
max. (+25°C)
(10) Lead-free, Sn100%, halogen-free
*3
*1.
Overcharge hysteresis voltage n (n
=
1 to 4) can be selected as 0 V or from a range of 0.1 V to 0.4 V in
50 mV steps.
(Overcharge hysteresis voltage
=
Overcharge detection voltage
−
Overcharge release voltage)
*2.
Overdischarge hysteresis voltage n (n
=
1 to 4) can be selected as 0 V or from a range of 0.2 V to 0.7 V
in 100 mV steps.
(Overdischarge hysteresis voltage
=
Overdischarge release voltage
−
Overdischarge detection voltage)
*3.
Refer to “
Product Name Structure”
for details.
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium polymer rechargeable battery packs
Package
•
16-Pin TSSOP
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK
S-8254A Series
Block Diagram
COP
DOP, COP,
R
VMD
, R
VMS
Control Circuit
Delay Circuit
Delay Circuit
Delay Circuit
1 MΩ
VMP
900 kΩ
−
+
+
−
−
+
+
−
Rev.5.1
_00
VDD
VC1
Delay Circuit
VC2
VC3
DOP
−
+
+
−
+
−
VC4
−
+
+
−
VINI
+
−
+
−
CDT
CCT
200 nA
CTL
VSS
SEL
Remark
1.
Diodes in the figure are parasitic diodes.
2.
Numerical values are typical values.
Figure 1
2
Seiko Instruments Inc.
Rev.5.1
_00
BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK
S-8254A Series
Product Name Structure
1. Product Name
S-8254A
xx
FT
-
TB
-
x
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: 16-Pin TSSOP
Serial code
*2
Sequentially set from AA to ZZ
*1.
Refer to the tape specifications at the end of this book.
*2.
Refer to “3.
Product Name List”.
2. Package
Package name
Package
Tape
Reel
16-Pin TSSOP
Environmental code = G, S
Environmental code = U
FT016-A-P-SD
FT016-A-P-SD
FT016-A-C-SD
FT016-A-C-SD
FT016-A-R-SD
FT016-A-R-S1
Seiko Instruments Inc.
3
BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK
S-8254A Series
3. Product Name List
Table 1
Rev.5.1
_00
Overcharge
Overcharge
Overdischarge
Overdischarge
Overcurrent
0 V battery
detection voltage release voltage detection voltage release voltage detection voltage 1
charge function
[V
CU
]
[V
CL
]
[V
DL
]
[V
DU
]
[V
IOV1
]
Available
S-8254AAAFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.00
±
0.080 V 2.70
±
0.100 V
0.30
±
0.025 V
Available
S-8254AABFT-TB-x 4.250
±
0.025 V 4.250
±
0.025 V 2.00
±
0.080 V 2.70
±
0.100 V
0.30
±
0.025 V
Available
S-8254AAEFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.00
±
0.080 V 2.70
±
0.100 V
0.20
±
0.025 V
Available
S-8254AAFFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.40
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Available
S-8254AAGFT-TB-x 4.275
±
0.025 V 4.075
±
0.050 V 2.30
±
0.080 V 2.70
±
0.100 V
0.13
±
0.025 V
Available
S-8254AAHFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.40
±
0.080 V 2.70
±
0.100 V
0.10
±
0.025 V
Available
S-8254AAIFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.40
±
0.080 V 3.00
±
0.100 V
0.30
±
0.025 V
Available
S-8254AAJFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.40
±
0.080 V 3.00
±
0.100 V
0.15
±
0.025 V
Available
S-8254AAKFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.70
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Available
S-8254AALFT-TB-x 4.300
±
0.025 V 4.150
±
0.050 V 2.40
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Available
S-8254AAMFT-TB-x 4.200
±
0.025 V 4.100
±
0.050 V 2.50
±
0.080 V 2.70
±
0.100 V
0.30
±
0.025 V
Available
S-8254AANFT-TB-x 4.250
±
0.025 V 4.150
±
0.050 V 2.50
±
0.080 V 3.00
±
0.100 V
0.10
±
0.025 V
Available
S-8254AAOFT-TB-x 4.300
±
0.025 V 4.080
±
0.050 V 2.50
±
0.080 V 3.00
±
0.100 V
0.10
±
0.025 V
Available
S-8254AAPFT-TB-x 4.280
±
0.025 V 4.130
±
0.050 V 3.00
±
0.080 V 3.00
±
0.080 V
0.15
±
0.025 V
Available
S-8254AAQFT-TB-x 3.900
±
0.025 V 3.800
±
0.050 V 2.30
±
0.080 V 2.70
±
0.100 V
0.30
±
0.025 V
Available
S-8254AARFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.80
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Available
S-8254AASFT-TB-x 4.290
±
0.025 V 4.090
±
0.050 V 2.30
±
0.080 V 3.00
±
0.100 V
0.075
±
0.025 V
Available
S-8254AATFT-TB-x 4.200
±
0.025 V 4.200
±
0.025 V 2.00
±
0.080 V 2.70
±
0.100 V
0.30
±
0.025 V
Unavailable
S-8254AAUFT-TB-x 4.350
±
0.025 V 4.150
±
0.050 V 2.40
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Available
S-8254AAVFT-TB-x 4.250
±
0.025 V 4.150
±
0.050 V 2.70
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Unavailable
S-8254AAWFT-TB-x 4.250
±
0.025 V 4.100
±
0.050 V 3.00
±
0.080 V 3.20
±
0.100 V
0.10
±
0.025 V
Available
S-8254AAXFT-TB-x 4.250
±
0.025 V 4.100
±
0.050 V 2.00
±
0.080 V 2.70
±
0.100 V
0.15
±
0.025 V
Available
S-8254AAYFT-TB-x 4.275
±
0.025 V 4.125
±
0.050 V 2.40
±
0.080 V 2.70
±
0.100 V
0.10
±
0.025 V
Available
S-8254AAZFT-TB-x 4.250
±
0.025 V 4.150
±
0.050 V 2.00
±
0.080 V 2.70
±
0.100 V
0.13
±
0.025 V
Available
S-8254ABAFT-TB-x 3.900
±
0.025 V 3.800
±
0.050 V 2.00
±
0.080 V 2.50
±
0.100 V
0.15
±
0.025 V
Available
S-8254ABBFT-TB-x 4.200
±
0.025 V 4.200
±
0.025 V 2.50
±
0.080 V 3.20
±
0.100 V
0.30
±
0.025 V
Available
S-8254ABCFT-TB-x 4.175
±
0.025 V 3.975
±
0.050 V 2.75
±
0.080 V 3.05
±
0.100 V
0.10
±
0.025 V
Available
S-8254ABDFT-TB-y 4.300
±
0.025 V 4.100
±
0.050 V 2.00
±
0.080 V 2.00
±
0.080 V
0.13
±
0.025 V
Available
S-8254ABEFT-TB-y 4.200
±
0.025 V 4.150
±
0.050 V 2.50
±
0.080 V 3.00
±
0.100 V
0.15
±
0.025 V
Available
S-8254ABFFT-TB-x 4.150
±
0.025 V 4.050
±
0.050 V 2.00
±
0.080 V 2.70
±
0.100 V
0.13
±
0.025 V
Available
S-8254ABGFT-TB-x 4.180
±
0.025 V 4.080
±
0.050 V 2.00
±
0.080 V 2.70
±
0.100 V
0.13
±
0.025 V
Available
S-8254ABHFT-TB-y 4.150
±
0.025 V 4.050
±
0.050 V 2.50
±
0.080 V 2.80
±
0.100 V
0.10
±
0.025 V
Unavailable
S-8254ABIFT-TB-x 4.215
±
0.025 V 4.115
±
0.050 V 2.40
±
0.080 V 3.00
±
0.100 V
0.20
±
0.025 V
Remark 1.
Please contact our sales office for the products with the 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.
Product name /
Item
4
Seiko Instruments Inc.
Rev.5.1
_00
BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK
S-8254A Series
Pin Configuration
16-Pin TSSOP
Top view
COP
VMP
DOP
VINI
CDT
CCT
VSS
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
VC1
VC2
VC3
VC4
CTL
SEL
NC
Figure 2
Table 2
Description
FET gate connection pin for charge control (Nch open drain output)
Pin for voltage detection between VC1 and VMP (Pin for overcurrent 3
2
VMP
detection)
3
DOP
FET gate connection pin for discharge control FET (CMOS output)
Pin for voltage detection between VSS and VINI (Pin for overcurrent detection
4
VINI
1,2)
Capacitor connection pin for delay for overdischarge detection, delay for
5
CDT
overcurrent detection 1
6
CCT
Capacitor connection pin for delay for overcharge current
Input pin for negative power supply,
7
VSS
Connection pin for battery 4’s negative voltage
*1
8
NC
No connection
*1
9
NC
No connection
Pin for switching 3-series or 4-series cell
10
SEL
V
SS
level: 3-series cell, V
DD
level : 4-series cell
11
CTL
Control of charge FET and discharge FET
Connection pin for battery 3’s negative voltage,
12
VC4
Connection pin for battery 4’s positive voltage
Connection pin for battery 2’s negative voltage,
13
VC3
Connection pin for battery 3’s positive voltage
Connection pin for battery 1’s negative voltage,
14
VC2
Connection pin for battery 2’s positive voltage
15
VC1
Connection pin for battery 1’s positive voltage
Input pin for positive power supply,
16
VDD
Connection pin for battery 1’s positive voltage
*1.
The NC pin is electrically open. The NC pin can be connected to VDD or VSS.
Pin No.
1
Symbol
COP
Seiko Instruments Inc.
5
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