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
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
(1)
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium polymer rechargeable battery packs
Seiko Instruments Inc.
1
SII [ SEIKO INSTRUMENTS INC ]
