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S-8241ABKMC-GBKT2G Datasheet, PDF (1/39 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK | |||
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S-8241 Series
www.sii-ic.com
© Seiko Instruments Inc., 1999-2012
BATTERY PROTECTION IC
FOR 1-CELL PACK
Rev.9.1_00
The S-8241 Series is a series of lithium ion/lithium polymer rechargeable battery protection ICs incorporating high-accuracy
voltage detection circuits and delay circuits.
These ICs are suitable for protection of 1-cell lithium ion/lithium polymer battery packs from overcharge, overdischarge and
overcurrent.
 Features
(1) Internal high-accuracy voltage detection circuit
⢠Overcharge detection voltage: 3.9 V to 4.4 V (5 mV-step)
⢠Overcharge release voltage:
Accuracy of ±25 mV (+25°C) and ± 30 mV (â5 to +55°C)
3.8 V to 4.4 V*1 Accuracy of ±50 mV
⢠Overdischarge detection voltage: 2.0 V to 3.0 V (100 mV-step) Accuracy of ±80 mV
⢠Overdischarge release voltage: 2.0 V to 3.4 V*2 Accuracy of ±100 mV
⢠Overcurrent 1 detection voltage: 0.05 V to 0.32 V (5 mV-step) Accuracy of ±20 mV
⢠Overcurrent 2 detection voltage: 0.5 V (fixed) Accuracy of ±100 mV
(2) A high voltage withstand device is used for charger connection pins
(VM and CO pins: Absolute maximum rating = 26 V)
(3) Delay times (overcharge: tCU; overdischarge: tDL; overcurrent 1: tlOV1; overcurrent 2: tlOV2) are generated
by an internal circuit. (External capacitors are unnecessary.) Accuracy of ±30%
(4) Internal three-step overcurrent detection circuit (overcurrent 1, overcurrent 2, and load short-circuiting)
(5) Either the 0 V battery charging function or 0 V battery charge inhibiting function can be selected.
(6) Products with and without a power-down function can be selected.
(7) Charger detection function and abnormal charge current detection function
⢠The overdischarge hysteresis is released by detecting a negative VM pin voltage (typ. â1.3 V) (Charger detection
function).
⢠If the output voltage at DO pin is high and the VM pin voltage becomes equal to or lower than the charger detection
voltage (typ. â1.3 V), the output voltage at CO pin goes low (Abnormal charge current detection function).
(8) Low current consumption
⢠Operation:
3.0 μA typ. 5.0 μA max.
⢠Power-down mode: 0.1 μA max.
(9) Wide operation temperature range: â40°C to +85°C
(10) Lead-free, Sn 100%, halogen-free*3
*1. Overcharge release voltage = Overcharge detection voltage - Overcharge hysteresis
The overcharge hysteresis can be selected in the range 0.0 V, or 0.1 V to 0.4 V in 50 mV steps. (However, selection
âOvercharge release voltage<3.8 Vâ is enabled.)
*2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis
The overdischarge hysteresis can be selected in the range 0.0 V to 0.7 V in 100 mV steps. (However, selection
âOverdischarge release voltage>3.4 Vâ is enabled.)
*3. Refer to â Product Name Structureâ for details.
 Applications
⢠Lithium-ion rechargeable battery pack
⢠Lithium- polymer rechargeable battery pack
 Packages
⢠SOT-23-5
⢠SNT-6A
Seiko Instruments Inc.
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