S-8242B Series
www.sii-ic.com
© Seiko Instruments Inc., 2006-2013
BATTERY PROTECTION IC
FOR 2-SERIAL-CELL PACK
Rev.2.3
_01
The S-8242B Series are protection ICs for 2-serial-cell lithium-ion/lithium polymer rechargeable batteries and include high-
accuracy voltage detectors and delay circuits.
These ICs are suitable for protecting 2-cell lithium-ion / lithium polymer rechargeable battery packs from overcharge,
overdischarge, and overcurrent.
Features
(1)
High-accuracy voltage detection for each cell
•
Overcharge detection voltage n (n
=
1, 2)
3.9 V to 4.5 V (50 mV steps)
Accuracy
±25
mV
*1
Accuracy
±50
mV
•
Overcharge release voltage n (n
=
1, 2)
3.8 V to 4.5 V
•
Overdischarge detection voltage n (n
=
1, 2)
2.0 V to 3.0 V (100 mV steps)
Accuracy
±50
mV
*2
Accuracy
±100
mV
•
Overdischarge release voltage n (n
=
1, 2)
2.0 V to 3.4 V
Two-level overcurrent detection (overcurrent 1, overcurrent 2)
•
Overcurrent detection voltage 1
0.05 V, 0.08 V to 0.30 V (10 mV steps)
Accuracy
±15
mV
•
Overcurrent detection voltage 2
1.2 V (fixed)
Accuracy
±300
mV
Delay times (overcharge, overdischarge, overcurrent) are generated by an internal circuit (external capacitors are
unnecessary).
0 V battery charge function available/unavailable are selectable.
Charger detection function
•
The overdischarge hysteresis is released by detecting negative voltage at the VM pin (−0.7 V typ.) (Charger
detection function).
High-withstand voltage devices
Absolute maximum rating: 28 V
Wide operating temperature range
−40°C
to
+85°C
Low current consumption
Operation mode
10
μA
max. (+25°C)
Power-down mode
0.1
μA
max. (+25°C)
*3
Lead-free, Sn 100%, halogen-free
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
*1.
Overcharge release voltage
=
Overcharge detection voltage
−
Overcharge hysteresis voltage
(Overcharge hysteresis voltage n (n
=
1, 2) 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, 2) can be selected as 0 V or from a range of 0.1 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
Packages
•
SNT-8A
•
8-Pin TSSOP
Seiko Instruments Inc.
1
Rev.2.3
_01
Product Name Structure
1. Product Name
S-8242B
xx - xxxx
x
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242B 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)
Package name (abbreviation) and IC packing specifications
I8T1 : SNT-8A, Tape
T8T1: 8-Pin TSSOP, Tape
Serial code
Sequentially set from AA to ZZ
*1
*1.
Refer to the tape specifications.
2. Package
Drawing Code
Tape
Reel
PH008-A-C-SD
PH008-A-R-SD
FT008-E-C-SD
FT008-E-R-SD
FT008-E-C-SD
FT008-E-R-S1
Package Name
SNT-8A
8-Pin TSSOP
Environmental code = G, S
Environmental code = U
Package
PH008-A-P-SD
FT008-A-P-SD
FT008-A-P-SD
Land
PH008-A-L-SD
⎯
Seiko Instruments Inc.
3
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