S-8243A Datasheet, PDF (1/34 Pages) Seiko Instruments Inc – BATTRY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

Rev.2.4_00
BATTRY PROTECTION IC
FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
The S-8243A/B is a series of lithium-ion rechargeable
battery protection ICs incorporating high-accuracy
battery protection circuits, a battery monitor amp and a
voltage regulator which drives microcomputer and gas
gauge IC. Combining microcomputer or gas gauge IC
facilitates displaying a remaining amount of battery.
The S-8243A/B is suitable for protection of 3-serial or
4-serial cell 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 4)
3.9 V to 4.4 V (50 mV step)
Accuracy ±25 mV
• Hysteresis voltage n (n=1 to 4) of overcharge detection
−0.10 V to −0.40 V (50 mV step) or 0 V
Accuracy ±50 mV
(Overcharge release voltage n (=Overcharge detection voltage n + Hysteresis voltage n) can be
selected within the range 3.8 V to 4.4 V.)
• Overdischarge detection voltage n (n=1 to 4)
2.0 V to 3.0 V (100 mV step)
Accuracy ±80 mV
• Hysteresis voltage n (n=1 to 4) of overdischarge detection
0.20 V to 0.70 V or 0 V (100 mV step)
Accuracy ±100 mV
(Overdischarge release voltage n (=Overdischarge detection voltage n + Hysteresis voltage n) can
be selected within the range 2.0 V to 3.4 V.)
(2) Three-level overcurrent protection including protection for short-circuiting
• Overcurrent detection voltage 1 0.05 V to 0.3 V (50 mV step) Accuracy ±25 mV
• Overcurrent detection voltage 2 0.5 V
Accuracy ±100 mV
• Overcurrent detection voltage 3 V_DD/2
Accuracy ±15 %
(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by
external capacitors.
(Delay times for overcurrent detection 2 and 3 are fixed internally.)
(4) Charge/discharge operation can be controlled through the control pins.
(5) High-accuracy battery monitor amp GAMP = V_BATTERY × 0.2 ±1.0%
(6) Voltage regulator
V_OUT = 3.3 V ±2.4 % (3 mA max.)
(7) High input-voltage device
Absolute maximum rating: 26 V
(8) Wide operating voltage range
6 V to 18 V
(9) Wide operating temperature range: −40°C to +85 °C
(10) Low current consumption
Operation mode
120 μA max.
Power down mode
0.1 μA max.
(11) Small package
16-Pin TSSOP package
(12) Lead-free products
„ Applications
• Lithium-ion rechargeable battery packs
• Lithium polymer rechargeable battery packs
Seiko Instruments Inc.
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