S-8241 Series
www.sii-ic.com
© Seiko Instruments Inc., 1999-2013
BATTERY PROTECTION IC
FOR 1-CELL PACK
Rev.9.2
_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 rechargeable battery packs from overcharge,
overdischarge and overcurrent.
Features
Internal high-accuracy voltage detection circuit
•
Overcharge detection voltage:
3.9 V to 4.4 V (5 mV-step)
Accuracy of ±25 mV (+25°C) and ± 30 mV (−5 to +55°C)
*1
•
Overcharge release voltage:
3.8 V to 4.4 V Accuracy of ±50 mV
•
Overdischarge detection voltage: 2.0 V to 3.0 V (100 mV-step) Accuracy of ±80 mV
*2
•
Overdischarge release voltage:
2.0 V to 3.4 V 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: t
CU
; overdischarge: t
DL
; overcurrent 1: t
lOV1
; overcurrent 2: t
lOV2
) 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.
−1.3
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.
−1.3
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:
−40°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
“Overcharge release voltage<3.8 V” 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
“Overdischarge release voltage>3.4 V” is enabled.)
*3.
Refer to “
Product Name Structure”
for details.
(1)
Applications
•
Lithium-ion rechargeable battery pack
•
Lithium- polymer rechargeable battery pack
Packages
•
SOT-23-5
•
SNT-6A
Seiko Instruments Inc.
1
Rev.9.2
_00
Product Name Structure
1. Product Name
S-8241A xx xx - xxx xx x
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
Environmental code
U:
Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications
T2 : SOT-23-5
TF : SNT-6A
Product name (abbreviation)
2
*1
Package name (abbreviation)
MC : SOT-23-5
PG : SNT-6A
Serial code
Sequentially set from BA to ZZ
*1.
Refer to the tape specifications.
*2.
Refer to the “3.
Product Name List”.
2. Package
Drawing code
Package
MP005-A-P-SD
PG006-A-P-SD
Tape
MP005-A-C-SD
PG006-A-C-SD
Reel
MP005-A-R-SD
PG006-A-R-SD
Land
⎯
PG006-A-L-SD
Package name
SOT-23-5
SNT-6A
Seiko Instruments Inc.
3
Analog electronics
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