S-8253A/B Series
www.sii-ic.com
© Seiko Instruments Inc., 2003-2010
BATTERY PROTECTION IC
FOR 2-SERIAL OR 3-SERIAL-CELL PACK
Rev.5.0
_00
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 rechargeable 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)
*1
•
Overcharge release voltage n (n
=
1 to 3)
3.8 V to 4.4 V
•
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.
are 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 V to 24 V
(8) Wide operating temperature range
−40°C
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)
*3
(10) Lead-free, Sn100%, halogen-free
*1.
(1)
Accuracy
±25
mV
Accuracy
±50
mV
Accuracy
±80
mV
Accuracy
±100
mV
(External capacitors
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 V 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 V to 0.7 V in
100 mV steps.)
*3.
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 OR 3-SERIAL-CELL PACK
S-8253A/B Series
Product Name Structure
1.
Product Name
1. 1
Environmental code = U
x
xx
−
T8T1
U
Environmental code
U:
Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications
*1
T8T1: 8-Pin TSSOP, Tape
Serial code
Sequentially set from AA to ZZ
Product series name
A:
2-cell
B:
3-cell
*1.
Refer to the tape specifications.
*2.
Refer to the “3.
Product Name List”.
1. 2
Environmental code = G
*2
Rev.5.0
_00
S-8253
S-8253
x
xx
−
T8T1
G
Z
Fixed
Environmental code
G:
Lead-free (for details, please contact our sales office)
Package abbreviation and IC packing specifications
T8T1: 8-Pin TSSOP, Tape
Serial code
*2
Sequentially set from AA to ZZ
Product series name
A:
2-cell
B:
3-cell
*1.
*2.
Refer to the tape specifications.
Refer to the “3.
Product Name List”.
*1
2.
Package
Package Name
Package
FT008-A-P-SD
FT008-A-P-SD
Drawing Code
Tape
FT008-E-C-SD
FT008-E-C-SD
Reel
FT008-E-R-SD
FT008-E-R-S1
8-Pin TSSOP
Environmental code = G
Environmental code = U
4
Seiko Instruments Inc.
PCB Design
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