S-8242B Datasheet, PDF (1/30 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK

Rev.1.4_00
BATTERY PROTECTION IC
FOR 2-SERIAL-CELL PACK
S-8242B Series
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 rechargeable
lithium-ion / lithium polymer battery packs from overcharge,
overdischarge, and overcurrent.
„ Features
(1) High-accuracy voltage detection for each cell
• Overcharge detection voltage n (n = 1, 2)
• Overcharge release voltage n (n = 1, 2)
3.9 V to 4.5 V (50 mV steps)
3.8 V to 4.5 V^*1
Accuracy ±25 mV
Accuracy ±50 mV
• Overdischarge detection voltage n (n = 1, 2)
• Overdischarge release voltage n (n = 1, 2)
2.0 V to 3.0 V (100 mV steps)
2.0 V to 3.4 V^*2
Accuracy ±50 mV
Accuracy ±100 mV
*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.)
(2) 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
(3) Delay times (overcharge, overdischarge, overcurrent) are generated by an internal circuit (external capacitors are
unnecessary).
(4) 0 V battery charge function available/unavailable are selectable.
(5) Charger detection function
• The overdischarge hysteresis is released by detecting negative voltage at the VM pin (−0.7 V typ.) (Charger
detection function).
(6) High-withstanding-voltage devices
Absolute maximum rating: 28 V
(7) Wide operating temperature range
−40°C to +85 °C
(8) Low current consumption
Operation mode
10 µA max. (+25°C)
Power-down mode
0.1 µA max. (+25°C)
(9) Small package
SNT-8A, 8-Pin TSSOP
(10) Lead-free products
„ Applications
• Lithium-ion rechargeable battery packs
• Lithium polymer rechargeable battery packs
„ Packages
Package Name
SNT-8A
8-Pin TSSOP
Package
PH008-A
FT008-A
Drawing Code
Tape
Reel
PH008-A
PH008-A
FT008-E
FT008-E
Land
PH008-A

Seiko Instruments Inc.
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