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S-8241 Datasheet, PDF (1/38 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK | |||
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Rev.7.6_00
BATTERY PROTECTION IC
FOR 1-CELL PACK
S-8241 Series
 Features
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.
(1) Internal high-accuracy voltage detection circuit
⢠Overcharge detection voltage: 3.9 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 to 4.4 V *1 Accuracy of ±50 mV
⢠Overdischarge detection voltage: 2.0 to 3.0 V (100 mV-step) Accuracy of ±80 mV
⢠Overdischarge release voltage: 2.0 to 3.4 V *2 Accuracy of ±100 mV
⢠Overcurrent 1 detection voltage: 0.05 to 0.3 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 hysterisis 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 operating temperature range: â40 to +85 °C
(10) Small package SOT-23-5, SNT-6A
(11) Lead-free products
*1. Overcharge release voltage = Overcharge detection voltage - Overcharge hysteresis
The overcharge hysteresis can be selected in the range 0.0, or 0.1 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 to 0.7 V in 100 mV steps. (However, selection
âOverdischarge release voltage>3.4 Vâ is enabled.)
 Applications
⢠Lithium-ion rechargeable battery packs
⢠Lithium- polymer rechargeable battery packs
 Packages
Package name
SOT-23-5
SNT-6A
Package
MP005-A
PG006-A
Drawing code
Tape
Reel
MP005-A
MP005-A
PG006-A
PG006-A
Land
â¯
PG006-A
Seiko Instruments Inc.
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