S-8253A Datasheet, PDF (1/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK

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
(1) High-accuracy voltage detection for each cell
• Overcharge detection voltage n (n = 1 to 3)
• Overcharge release voltage n (n = 1 to 3)
3.9 V to 4.4 V (50 mV steps)
3.8 V to 4.4 V ^*1
Accuracy ±25 mV
Accuracy ±50 mV
• Overdischarge detection voltage n (n = 1 to 3)
• Overdischarge release voltage n (n = 1 to 3)
2.0 V to 3.0 V (100 mV steps)
2.0 V to 3.4 V ^*2
Accuracy ±80 mV
Accuracy ±100 mV
(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. (External capacitors 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 to 24 V
(8) Wide operating temperature range
−40 to +85 °C
(9) Low current consumption
• Operation mode
28 µA max. (+25 °C)
• Power-down mode 0.1 µA max. (+25 °C)
(10) Lead-free products
*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.
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