S-8261 Series
www.sii-ic.com
© Seiko Instruments Inc., 2001-2012
BATTERY PROTECTION IC FOR 1-CELL PACK
Rev.5.3
_00
The S-8261 Series is a lithium-ion / lithium polymer rechargeable battery protection IC incorporating high-accuracy voltage
detection circuit and delay circuits.
The S-8261 Series is suitable for protection of single-cell lithium-ion / lithium polymer battery packs from overcharge,
overdischarge and overcurrent.
Features
(1)
Accuracy:
±25
mV (+25°C) and
±30
mV (−5°C to
+55°C)
*1
•
Overcharge hysteresis voltage
0.1 V to 0.4 V
Accuracy:
±25
mV
The overcharge hysteresis voltage can be selected from the range 0.1 V to 0.4 V in 50 mV step.
•
Overdischarge detection voltage
2.0 V to 3.0 V (applicable in 10 mV step) Accuracy:
±50
mV
•
Overdischarge hysteresis voltage 0.0 V to 0.7 V
*2
Accuracy:
±50
mV
The overdischarge hysteresis voltage can be selected from the range 0.0 V to 0.7 V in 100 mV step.
•
Overcurrent 1 detection voltage
0.05 V to 0.3 V (applicable in 10 mV step) Accuracy:
±15
mV
•
Overcurrent 2 detection voltage
0.5 V (fixed)
Accuracy:
±100
mV
(2) High voltage device is used for charger connection pins (VM and CO pins: absolute maximum rating
=
28 V).
(3) Delay times (overcharge: t
CU
, overdischarge: t
DL
, overcurrent 1: t
lOV1
, overcurrent 2: t
lOV2
) are generated by an
internal circuit. No external capacitor is necessary.
Accuracy:
±20%
(4) Three-step overcurrent detection circuit is included (overcurrent 1, overcurrent 2 and load short-circuiting).
(5) 0 V battery charge function “Available” / “Unavailable” is selectable.
(6) Power-down function “Yes” / “No” is selectable.
(7) 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).
(8) Low current consumption
•
Operation mode
3.5
μA
typ., 7.0
μA
max.
•
Power-down mode
0.1
μA
max.
(9) Wide operating temperature range
−40°C
to
+85°C
(10) Lead-free, Sn 100%, halogen-free
*3
*1.
Overcharge release voltage
=
Overcharge detection voltage
−
Overcharge hysteresis voltage (where overcharge
release voltage
<
3.8 V is prohibited.)
*2.
Overdischarge release voltage
=
Overdischarge detection voltage
+
Overdischarge hysteresis voltage (where
overdischarge release voltage
>
3.4 V is prohibited.)
*3.
Refer to “
Product Name Structure”
for details.
Internal high accuracy voltage detection circuit
•
Overcharge detection voltage
3.9 V to 4.5 V (applicable in 5 mV step)
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium polymer rechargeable battery packs
Package
•
SOT-23-6
Seiko Instruments Inc.
1
Rev.5.3
_00
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8261 Series
Product Name Structure
1. Product Name
S-8261A xx
MD
-
xxx
T2
x
Environmental code
U: Lead-free (Sn 100%), halogen-free
S: Lead-free, halogen-free
G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
Product name (abbreviation)
*2
Package name (abbreviation)
MD: SOT-23-6
Serial code
Assigned from AA to ZZ in alphabetical order
*1.
Refer to the tape drawing.
*2.
Refer to the “3.
Product Name List”.
2. Package
Drawing code
Tape
MP006-A-C-SD
Package name
SOT-23-6
Package
MP006-A-P-SD
Reel
MP006-A-R-SD
Seiko Instruments Inc.
3
Rev.5.3
_00
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8261 Series
Table 1 (2 / 2)
Overcharge Overcharge Overdischarge Overdischarge Overcurrent 1
detection
hysteresis
detection
hysteresis
detection
voltage
voltage
voltage
voltage
voltage
[V
CU
]
[V
HC
]
[V
DL
]
[V
HD
]
[V
IOV1
]
0 V battery
charge
function
Delay
time
combi-
*1
nation
Power-down
function
Product name
S-8261ACMMD-G4MT2x
S-8261ACNMD-G4NT2x
S-8261ACSMD-G4ST2y
4.325 V
4.215 V
4.350 V
0.20 V
0.10 V
0.10 V
3.00 V
2.30 V
2.30 V
0.4 V
0.1 V
0.1 V
0.06 V
0.13 V
0.15 V
Unavailable
Unavailable
Available
(1)
(1)
(6)
Yes
Yes
Yes
*1.
Refer to the
Table 2
about the details of the delay time combinations (1) to (9).
Remark 1.
2.
3.
4.
Please contact our sales office for the products with detection voltage value other than those specified above.
x: G or U
y: S or U
Please select products of environmental code = U for Sn 100%, halogen-free products.
Table 2
Overcharge
detection
delay time
[t
CU
]
1.2 s
1.2 s
4.6 s
4.6 s
1.2 s
1.2 s
1.2 s
1.2 s
0.3 s
Overdischarge
detection
delay time
[t
DL
]
144 ms
144 ms
36 ms
144 ms
36 ms
144 ms
290 ms
144 ms
36 ms
Overcurrent 1
detection
delay time
[t
lOV1
]
9 ms
4.5 ms
18 ms
9 ms
9 ms
9 ms
18 ms
18 ms
9 ms
Overcurrent 2
detection
delay time
[t
lOV2
]
2.24 ms
2.24 ms
9 ms
2.24 ms
2.24 ms
1.12 ms
2.24 ms
2.24 ms
1.12 ms
Load short-circuiting
detection
delay time
[t
SHORT
]
320
μs
320
μs
320
μs
320
μs
320
μs
320
μs
320
μs
320
μs
320
μs
Delay time
combination
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Remark
The delay times can be changed within the range listed
Table 3.
For details, please contact our sales office.
Table 3
Delay time
Symbol
Overcharge detection delay time
t
CU
Overdischarge detection delay time
t
DL
Overcurrent 1 detection delay time
t
lOV1
Overcurrent 2 detection delay time
t
lOV1
Load short-circuiting detection delay time
t
SHORT
*1.
The value is the delay time of the standard products.
Selection range
1.2 s
*1
0.15 s
144 ms
*1
36 ms
9 ms
*1
4.5 ms
2.24 ms
*1
1.12 ms
320
μ
s
*1
⎯
Remarks
Choose from the left.
Choose from the left.
Choose from the left.
Choose from the left.
Choose from the left.
4.6 s
290 ms
18 ms
⎯
600
μ
s
Seiko Instruments Inc.
5
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