Rev.1.3
_00
BATTRY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL
(SECONDARY PROTECTION)
S-8244 Series
The S-8244 Series is used for secondary protection of lithium-ion
batteries with from one to four cells, and incorporates a high-precision
voltage detector circuit and a delay circuit. Short-circuits between cells
accommodate series connection of one to four cells.
Features
•
Internal high-precision voltage detector circuit
1) Overcharge detection voltage range:
3.70 to 4.50 V:
(at a 5 mV/step)
2) Hysteresis:
Accuracy of ± 25 mV (at +25°C)
Accuracy of ± 50 mV (at -40 to +85°C)
5 optional models available and selectable:
0.38±0.1 V, 0.25±0.07 V, 0.13±0.04 V, 0.045±0.02 V, None
26 V
•
High withstand voltage device absolute maximum rating:
•
Wide operating voltage range:
•
Delay time during detection:
•
Low current consumption
At 3.5 V for each cell:
At 2.3 V for each cell:
3.0
µA
max. (+25°C)
2.4
µA
max. (+25°C)
3.6 V to 24 V (refers to the range in which the delay circuit can
operate normally after overvoltage is detected)
Can be set by an external capacitor.
•
Output logic and form - 4 types:
CMOS output active “H”
CMOS output active “L”
Pch open drain output active “L”
Nch open drain output active “H”
(only CMOS output for 0.045 V hysteresis models)
Applications
•
Lithium ion rechargeable battery packs (secondary protection)
Package
•
8-Pin MSOP (Package drawing code: FN008-A)
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL (SECONDARY PROTECTION)
Rev.1.3_
00
S-8244 Series
Block Diagram
VCC
SENSE
Overcharge detection
comparator 1
+
-
Reference voltage 1
VC1
Overcharge detection
comparator 2
+
-
Overcharge
detection
delay circuit
ICT
Control
logic
Reference voltage 2
VC2
Overcharge detection
comparator 3
+
-
Reference voltage 3
VC3
CO
Overcharge detection
comparator 4
+
-
Reference voltage 4
VSS
Note
In the case of Nch open-drain output, only the Nch transistor will be
connected to the CO pin. In the case of Pch open-drain output, only
the Pch transistor will be connected to the CO pin.
Figure 1
2
Seiko Instruments Inc.
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL (SECONDARY PROTECTION)
Rev.1.3
_00
S-8244 Series
Selection Guide
1.
Product Name
S−8244A
−
xx
FN
−
xxx
−
T2
IC direction of tape specifications
Product name (abbrevation)
*2
*1
Package abbreviation
FN: 8-Pin MSOP
Additional number
Sequentially set from AA to ZZ
*1.
*2.
2.
Refer to the taping drawing.
Refer to the product name list.
Product Name List
Table 1
Model No./Item
S-8244AAAFN-CEA-T2
S-8244AABFN-CEB-T2
S-8244AACFN-CEC-T2
S-8244AADFN-CED-T2
S-8244AAEFN-CEE-T2
S-8244AAFFN-CEF-T2
Overcharge
detection voltage
V
CU
4.45
±
0.025 V
4.2
±
0.025 V
4.115
±
0.025 V
4.2
±
0.025 V
4.225
±
0.025 V
4.35
±
0.025 V
4.45
±
0.025 V
4.30
±
0.025 V
Overcharge
hysteresis voltage
V
CD
0.38
±
0.1 V
0V
0.13
±
0.04 V
0V
0V
0.045
±
0.02 V
0.045
±
0.02 V
0.25
±
0.07 V
Output form
CMOS output active “H”
Nch open drain active “H”
CMOS output active “H”
Pch open drain active “L”
Nch open drain active “H”
CMOS output active “H”
CMOS output active “H”
CMOS output active “H”
S-8244AAGFN-CEG-T2
S-8244AAHFN-CEH-T2
Remark
If a product with the required detection voltage does not appear in the above
list, contact our sales office.
Seiko Instruments Inc
3
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL (SECONDARY PROTECTION)
Rev.1.3_
00
S-8244 Series
Pin Assignment
Table 2
8-Pin MSOP
Top view
VCC
SENSE
VC1
VC2
1
2
3
4
8
7
6
5
CO
ICT
VSS
VC3
Pin No. Symbol
Description
1
VCC
Positive power input pin
2
SENSE
Positive voltage connection pin of Battery 1
3
VC1
Negative voltage connection pin of
Battery 1;
Positive voltage connection pin of Battery 2
4
Figure 2
5
VC2
Negative voltage connection pin of
Battery 2;
Positive voltage connection pin of
Battery 3
Negative voltage connection pin of
Battery 3;
Positive voltage connection pin of
Battery 4
Negative power input pin;
Negative voltage connection pin of
Battery 4
Capacitor connection pin for
overcharge detection delay
FET gate connection pin for charge
control
VC3
6
7
8
VSS
ICT
CO
Absolute Maximum Ratings
Table 3
Item
Input voltage between VCC
and VSS
Delay capacitor connection
pin voltage
Input pin voltage
Symbol
V
DS
V
ICT
V
IN
Applicable pin
VCC
ICT
SENSE, VC1,
VC2, VC3
(Ta
=
25°C unless otherwise specified)
Rating
V
SS
−0.3
to V
SS
+26
V
SS
−0.3
to V
CC
+0.3
V
SS
−0.3
to V
CC
+0.3
V
SS
−0.3
to V
CC
+0.3
(CMOS output)
CO output pin voltage
V
CO
CO
V
SS
−0.3
to 26
(Nch open drain output)
V
CC
−26
to V
CC
+0.3
(Pch open drain output)
Power dissipation
Operating temperature range
Storing temperature range
Caution
P
D
T
opr
T
stg
Unit
V
V
V
V
300
−40
to
+85
−40
to
+125
mW
°C
°C
The absolute maximum ratings are rated values exceeding which the product could
suffer physical damage. These values must therefore not be exceeded under any
conditions.
Seiko Instruments Inc.
4
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL (SECONDARY PROTECTION)
Rev.1.3
_00
S-8244 Series
Electrical Characteristics
Table 4
Item
DETECTION VOLTAGE
Overcharge detection voltage 1
*1
Overcharge detection voltage 2
*1
Overcharge detection voltage 3
*1
Overcharge detection voltage 4
*1
Overcharge hysteresis voltage 1
*2
Overcharge hysteresis voltage 2
*2
(Ta
=
25
°C
unless otherwise specified)
Min.
Typ.
Max.
Unit
Measure-
ment
conditions
Measure
-ment
circuit
Symbol
Conditions
V
CU1
V
CU2
V
CU3
V
CU4
V
CD1
V
CD2
V
CD3
V
CD4
T
COE
3.7 to 4.5 V Adjustment
3.7 to 4.5 V Adjustment
3.7 to 4.5 V Adjustment
3.7 to 4.5 V Adjustment
Ta=−40 to 85°C
V
CU1
−0.025
V
CU2
−0.025
V
CU3
−0.025
V
CU4
−0.025
0.28
0.28
0.28
0.28
−0.4
V
CU1
V
CU2
V
CU3
V
CU4
0.38
0.38
0.38
0.38
0.0
V
CU1
+0.025
V
CU2
+0.025
V
CU3
+0.025
V
CU4
+0.025
0.48
0.48
0.48
0.48
+0.4
V
V
V
V
V
V
V
V
mV/°C
1
2
3
4
1
2
3
4
1
1
1
1
1
1
1
1
Overcharge hysteresis voltage 3
*2
Overcharge hysteresis voltage 4
Detection voltage temperature
coefficient
*3
DELAY TIME
Overcharge detection delay time
OPERATING VOLTAGE
Operating voltage between VCC
and VSS
*4
CURRENT CONSUMPTION
Current consumption during
normal operation
Current consumption at power
down
VC1 sink current
VC2 sink current
VC3 sink current
OUTPUT VOLTAGE
*5
CO “H” voltage
CO “L” voltage
*
*
*2
t
CU
C=0.1
µF
1.0
1.5
2.0
s
5
2
V
DSOP
3.6
24
V
I
OPE
I
PDN
I
VC1
I
VC2
I
VC
3
V1=V2=V3=V4=3.5V
V1=V2=V3=V4=2.3V
V1=V2=V3=V4=3.5V
V1=V2=V3=V4=3.5V
V1=V2=V3=V4=3.5V
−0.3
−0.3
−0.3
1.5
1.2
3.0
2.4
0.3
0.3
0.3
µA
µA
µA
µA
µA
6
6
6
6
6
3
3
3
3
3
V
CO(H)
V
CO(L)
at I
OUT
=
10
µA
at I
OUT
=
10
µA
V
CC
−0.05
V
SS
+0.05
V
V
7
7
4
4
1.
2.
*
3.
*
4.
*
5.
±50 mV when Ta
= −40
to
+85°C.
0.25±0.07 V, 0.13±0.04 V, 0.045±0.02 V except for 0.38 V hysteresis models.
Overcharge detection voltage or overcharge hysteresis voltage.
Operating voltage indicates that the delay circuit operates normally after an overcharge is detected.
Output logic and CMOS or open drain output can be selected.
Seiko Instruments Inc
5
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