PROTECTION IC. S-8242 Datasheet

S-8242 IC. Datasheet pdf. Equivalent

Part S-8242
Description BATTERY PROTECTION IC
Feature Rev.1.0_00 BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8242 Series The S-8242 Series are prote.
Manufacture Seiko Instruments
Datasheet
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S-8242
Rev.1.0_00
BATTERY PROTECTION IC
FOR 2-SERIAL-CELL PACK
S-8242 Series
The S-8242 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 4.4 V (50 mV steps) Accuracy ±25 mV
3.8 V to 4.4 V*1
Accuracy ±50 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.)
Overdischarge detection voltage n (n = 1, 2)
Overdischarge release voltage n (n = 1, 2)
2.0 V to 3.0 V (100 mV steps) Accuracy ±50 mV
2.0 V to 3.4 V*2
Accuracy ±100 mV
*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 to 0.30 V (50 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 and abnormal charge current detection function
The overdischarge hysteresis is released by detecting negative voltage at the VM pin (0.7 V typ.).
(Charger detection function)
When the output voltage of the DO pin is high and the voltage at the VM pin is equal to or lower than
the charger detection voltage (0.7 V typ.), the output voltage of the CO pin goes low. (Abnormal
charge current 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
SOT-23-6W, 6-Pin SNB(B)
„ Applications
„ Package
Lithium-ion rechargeable battery packs
Lithium-polymer rechargeable battery packs
SOT-23-6W (PKG drawing code: MP006-B)
6-Pin SNB(B) (PKG drawing code: BD006-A)
Seiko Instruments Inc.
1



S-8242
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242 Series
„ Block Diagram
Rev.1.0_00
DO
CO
300 k
VM
20 k
Delay circuit, controller,
0 V battery charge/
charge inhibition circuit
+
+
+
+
Charger
detector
+
+
VDD
VC
VSS
Remark The diodes in the block diagram are parasitic diodes.
Figure 1 Block Diagram
2 Seiko Instruments Inc.





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