Rev.3.7
_00
BATTERY PROTECTION IC
FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
The S-8253A/B Series are protection ICs for 2-serial or 3-serial
cell lithium-ion rechargeable batteries and include high-accuracy
voltage detectors and delay circuits.
These ICs are suitable for protecting lithium-ion battery packs
from overcharge, overdischarge and overcurrent.
Features
High-accuracy voltage detection for each cell
•
Overcharge detection voltage n (n
=
1 to 3)
3.9 V to 4.4 V (50 mV steps)
•
Overcharge release voltage n (n
=
1 to 3)
3.8 V to 4.4 V
*1
•
Overdischarge detection voltage n (n
=
1 to 3)
2.0 V to 3.0 V (100 mV steps)
*2
•
Overdischarge release voltage n (n
=
1 to 3)
2.0 V to 3.4 V
(2) Three-level overcurrent detection (Including load short circuiting detection)
•
Overcurrent detection voltage 1
0.05 V to 0.30 V (50 mV steps) Accuracy
±25
mV
•
Overcurrent detection voltage 2
0.5 V (Fixed)
•
Overcurrent detection voltage 3
1.2 V (Fixed)
(3) Delay times (Overcharge, Overdischarge, Overcurrent) are generated by an internal circuit.
unnecessary).
(4) Charge / discharge operation can be inhibited via the control pin.
(5) 0 V battery charge function available / unavailable are selectable.
(6) High-voltage withstand devices
Absolute maximum rating 26 V
(7) Wide operating voltage range
2 to 24 V
(8) Wide operating temperature range
−40
to
+85 °C
(9) Low current consumption
•
Operation mode
28
µ
A max. (+25
°C)
•
Power-down mode
0.1
µ
A max. (+25
°C)
(10) Lead-free products
(1)
Accuracy
±25
mV
Accuracy
±50
mV
Accuracy
±80
mV
Accuracy
±100
mV
(External capacitors are
*1.
Overcharge release voltage
=
Overcharge detection voltage
−
Overcharge hysteresis voltage
(Overcharge hysteresis voltage n (n
=
1 to 3) can be selected as 0 V or from a range of 0.1 to 0.4 V in
50 mV steps.)
*2.
Overdischarge release voltage
=
Overdischarge detection voltage
+
Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage n (n
=
1 to 3) can be selected as 0 V or from a range of 0.2 to 0.7 V in
100 mV steps.)
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium polymer rechargeable battery packs
Package
Package Name
8-Pin TSSOP
Package
FT008-A
Drawing Code
Tape
FT008-E
Reel
FT008-E
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Block Diagrams
1. S-8253A Series
Rev.3.7
_00
VDD
DOP
Oscillator, counter,
controller
COP
−
+
+
−
+
−
+
−
+
−
VC1
−
+
+
−
95 kΩ
VMP
900 kΩ
VC2
−
+
+
−
CTLH
200 nA
CTL
CTLM
VSS
Remark
All diodes shown in figure are parasitic diodes.
Figure 1
2
Seiko Instruments Inc.
Rev.3.7
_00
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
2. S-8253B Series
VDD
DOP
Oscillator, counter,
controller
COP
−
+
+
−
+
−
+
−
+
−
VC1
−
+
+
−
95 kΩ
VMP
900 kΩ
VC2
−
+
+
−
CTLH
200 nA
CTL
CTLM
VSS
Remark
All diodes shown in figure are parasitic diodes.
Figure 2
Seiko Instruments Inc.
3
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Product Name Structure
1. Product Name
S-8253
x
xx
-
T8T1
GZ
Rev.3.7
_00
Indicates package type and packing specification of IC
*1
T8T1 : 8-Pin TSSOP, Tape
Serial code
*2
Sequentially set from AA to ZZ
Product series name
A : 2-cell
B : 3-cell
*1.
Refer to the taping specifications at the end of this book.
*2.
Refer to the “2.
Product Name List”.
2. Product Name List
Table 1 S-8253A Series (For 2-Serial Cell)
Model No.
S-8253AAA-T8T1GZ
S-8253AAB-T8T1GZ
S-8253AAC-T8T1GZ
S-8253AAD-T8T1GZ
S-8253AAE-T8T1GZ
S-8253AAF-T8T1GZ
S-8253AAG-T8T1GZ
S-8253AAH-T8T1GZ
Overcharge
detection voltage
V
CU
4.350
±0.025
V
4.350
±0.025
V
4.350
±0.025
V
4.250
±0.025
V
4.350
±0.025
V
4.350
±0.025
V
4.280
±0.025
V
4.350
±0.025
V
Overcharge
release voltage
V
CL
4.050
±0.050
V
4.050
±0.050
V
4.050
±0.050
V
4.050
±0.050
V
4.050
±0.050
V
4.050
±0.050
V
4.080
±0.050
V
4.150
±0.050
V
Overdischarge
detection voltage
V
DL
2.40
±0.080
V
2.70
±0.080
V
2.40
±0.080
V
2.40
±0.080
V
2.80
±0.080
V
2.40
±0.080
V
2.40
±0.080
V
2.30
±0.080
V
Overdischarge
release voltage
V
DU
2.70
±0.100
V
2.70
±0.080
V
2.70
±0.100
V
2.70
±0.100
V
3.00
±0.100
V
2.60
±0.100
V
2.70
±0.100
V
2.30
±0.080
V
Overcurrent
detection voltage
V
IOV1
0.300
±0.025
V
0.300
±0.025
V
0.080
±0.025
V
0.120
±0.025
V
0.300
±0.025
V
0.300
±0.025
V
0.150
±0.025
V
0.090
±0.025
V
0 V battery
charge function
Available
Available
Available
Available
Available
Unavailable
Unavailable
Available
Remark
Please contact the SII marketing department for the products with the detection voltage value other than those
specified above.
Table 2 S-8253B Series (For 3-Serial Cell)
Model No.
S-8253BAA-T8T1GZ
S-8253BAB-T8T1GZ
S-8253BAC-T8T1GZ
S-8253BAD-T8T1GZ
S-8253BAE-T8T1GZ
S-8253BAF-T8T1GZ
S-8253BAG-T8T1GZ
S-8253BAH-T8T1GZ
S-8253BAI-T8T1GZ
Overcharge
detection voltage
V
CU
4.350
±0.025
V
4.325
±0.025
V
4.350
±0.025
V
4.250
±0.025
V
4.350
±0.025
V
4.280
±0.025
V
4.280
±0.025
V
4.350
±0.025
V
4.350
±0.025
V
Overcharge
release voltage
V
CL
4.050
±0.050
V
4.075
±0.050
V
4.050
±0.050
V
4.050
±0.050
V
4.150
±0.050
V
4.180
±0.050
V
4.180
±0.050
V
4.150
±0.050
V
4.150
±0.050
V
Overdischarge
detection voltage
V
DL
2.40
±0.080
V
2.20
±0.080
V
2.40
±0.080
V
2.40
±0.080
V
2.20
±0.080
V
2.20
±0.080
V
2.20
±0.080
V
2.20
±0.080
V
2.20
±0.080
V
Overdischarge
release voltage
V
DU
2.70
±0.100
V
2.90
±0.100
V
2.70
±0.100
V
2.70
±0.100
V
2.40
±0.100
V
2.50
±0.100
V
2.50
±0.100
V
2.40
±0.100
V
2.40
±0.100
V
Overcurrent
detection voltage
V
IOV1
0.300
±0.025
V
0.200
±0.025
V
0.080
±0.025
V
0.120
±0.025
V
0.100
±0.025
V
0.190
±0.025
V
0.125
±0.025
V
0.250
±0.025
V
0.160
±0.025
V
0 V battery
charge function
Available
Unavailable
Available
Available
Available
Unavailable
Unavailable
Available
Available
Remark
Please contact the SII marketing department for the products with the detection voltage value other than those
specified above.
4
Seiko Instruments Inc.
Rev.3.7
_00
BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Pin Configuration
8-Pin TSSOP
Top view
DOP
COP
VMP
CTL
1
2
3
4
Figure 3
Table 3 S-8253A Series
8
7
6
5
VDD
VC1
VC2
VSS
Pin No.
1
Symbol
DOP
Description
Connection pin for discharge control FET gate
(CMOS output)
Connection pin for charge control FET gate
2
COP
(Nch open-drain output)
Pin for voltage detection between VDD and VMP
3
VMP
(Detection pin for overcurrent)
Input pin for charge / discharge control signal,
Pin for shortening test time
( L : Normal operation,
4
CTL
H : inhibit charge / discharge
M (V
DD
×
1 / 2) : shorten test time)
Input pin for negative power supply,
5
VSS
Connection pin for negative voltage of battery 2
6
VC2
No connection
*1
Connection pin for negative voltage of battery 1,
7
VC1
for positive voltage of battery 2
Input pin for positive power supply,
8
VDD
Connection pin for positive voltage of battery 1
*1.
No connection is electrically open. This pin can be connected to VDD or VSS.
Remark
Refer to the package drawings for the external views.
Table 4 S-8253B Series
Pin No.
1
Symbol
DOP
Description
Connection pin for discharge control FET gate
(CMOS output)
Connection pin for charge control FET gate
2
COP
(Nch open-drain output)
Pin for voltage detection between VDD and VMP
3
VMP
(Detection pin for overcurrent)
Input pin for charge / discharge control signal,
pin for shortening test time
( L : Normal operation,
4
CTL
H : inhibit charge / discharge,
M (V
DD
×
1 / 2) : shorten test time)
Input pin for negative power supply,
5
VSS
Connection pin for negative voltage of battery 3
Connection pin for negative voltage of battery 2,
6
VC2
for positive voltage of battery 3
Connection pin for negative voltage of battery 1,
7
VC1
for positive voltage of battery 2
Input pin for positive power supply,
8
VDD
Connection pin for positive voltage of battery 1
Remark
Refer to the package drawings for the external views.
Seiko Instruments Inc.
5
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