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S-8254ABIFT-TB-U
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P29
BATTERY PROTECTION IC FOR 3-SER
IAL- OR 4-SERIAL-CELL PACK
S-8254A Series
Rev.5.0
_01
Seiko Instrum
ents Inc.
16
9. SEL pin
The S-8254A Series has control pin
s. The SEL pin is
used to switch between 3-cell and 4-cell protection.
When the SEL pin is low, overdischarge detection of
the V4 cell is prohibited and an overdischarge is not
detected even if the V4 cell is
shorted, therefore,
the V4 cell can be used for 3-c
ell protection. The
SEL
pin takes precedence over the battery protecti
on ci
rcuit. Use the SEL pin at high or low.
Table 6 Conditions Set by SEL Pin
SEL Pin
Condition
High 4-cell
protection
Open Undefined
Low 3-cell
protection
BATTERY PROTECTION IC FOR 3-
SERIAL- OR 4-SERIAL-CELL PACK
Rev.5.0
_01
S-8254A Series
Seiko Instrum
ents Inc.
17
Timing Chart
1. Overcharge Detection and Overdischarge
Detection
V
CUn
V
DUn
V
DLn
V
CLn
High-Z
V
SS
V
DD
V
SS
<1> <2>
<1>
<4>
<1>
V
SS
V
DD
V
EB
+
V
EB
+
(n = 1 to 4)
Battery voltage
COP pin voltage
39 / 40
×
V
DD
VMP pin voltage
DOP pin voltage
Charger connection
Load connection
Status
*1
Overcharge connecti
on delay time (t
CU
)
High-Z
1 / 2
×
V
DD
<3>
Overdischarge connection delay time (t
DL
)
*1.
< 1 > : Normal status
< 2 > : Overcharge status
< 3 > : Overdischarge status
< 4 > : Power-down status
Remark
The charger is a
ssumed to charge with a constant current
. V
EB
+
indicates the open voltage of
the charger.
Figure 9
BATTERY PROTECTION IC FOR 3-SER
IAL- OR 4-SERIAL-CELL PACK
S-8254A Series
Rev.5.0
_01
Seiko Instrum
ents Inc.
18
2. Overcurrent detection
V
CUn
V
DUn
V
DLn
(n = 1
to 4)
V
CLn
Battery voltag
e
V
HC
V
HD
V
DD
DOP pi
n voltage
V
SS
High-Z
V
EB
+
V
SS
COP pi
n voltage
High-Z
High-Z
V
DD
V
SS
VMP pin v
oltage
V
IOV3
V
IOV2
V
SS
VINI pin v
o
l
t
a
g
e
V
DD
V
IOV1
Load co
nnectio
n
Status
*1
Overcur
rent 1 det
ectio
n
dela
y
time
(
t
IOV1
)
<1> <2>
<1>
<1>
<2> <1>
<2>
Overcur
rent 2 det
ectio
n
delay time (t
IOV2
)
Overcurrent 3 detection
delay time (t
IOV3
)
*1.
< 1 > : Normal status
< 2 > : Overcurrent status
Remark
The charger is a
ssumed to charge with a constant current
. V
EB
+
indicates the open voltage of
the charger.
Figure 10
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P29
S-8254ABIFT-TB-U
Mfr. #:
Buy S-8254ABIFT-TB-U
Manufacturer:
ABLIC
Description:
Battery Management LITHIUM-ION BATTERY PROTECTION 3/4 CELL
Lifecycle:
New from this manufacturer.
Delivery:
DHL
FedEx
Ups
TNT
EMS
Payment:
T/T
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