Rev.1.6
_00
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK
(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
(1) Internal high-precision voltage detector circuit
•
Overcharge detection voltage range :
3.70 to 4.50 V :
Accuracy of ± 25 mV (at +25°C)
(at a 5 mV/step)
Accuracy of ± 50 mV (at -40 to +85°C)
•
Hysteresis :
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
(2) High withstand voltage device :
Absolute maximum rating : 26 V
(3) Wide operating voltage range :
3.6 V to 24 V (refers to the range in which the delay circuit can
operate normally after overvoltage is detected)
(4) Delay time during detection :
Can be set by an external capacitor.
(5) Low current consumption :
At 3.5 V for each cell :
3.0
µA
max. (+25°C)
At 2.3 V for each cell :
2.4
µA
max. (+25°C)
(6) 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
Package name
8-Pin MSOP
Package
FN008-A
Drawing code
Tape
FN008-A
Reel
FN008-A
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
Rev.1.6
_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
Remark
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-CELL PACK (SECONDARY PROTECTION)
Rev.1.6
_00
S-8244 Series
Product Name Structure
1.
Product Name
S−8244A
xx
FN
−
xxx
−
T2
IC direction of tape specifications
*1
Product name (abbreviation)
*2
Package abbreviation
FN: 8-Pin MSOP
Serial code
Sequentially set from AA to ZZ
*1.
*2.
2.
Refer to the taping specifications at the end of this book.
Refer to the
Product Name List.
Product Name List
Table 1
Overcharge
Overcharge
hysteresis voltage
Output form
Model No./Item
detection voltage
[V
CD
]
[V
CU
]
S-8244AAAFN-CEA-T2
CMOS output active “H”
4.45
±
0.025 V
0.38
±
0.1 V
S-8244AABFN-CEB-T2
0V
Nch open drain active “H”
4.20
±
0.025 V
S-8244AACFN-CEC-T2
CMOS output active “H”
4.115
±
0.025 V
0.13
±
0.04 V
S-8244AADFN-CED-T2
0V
Pch open drain active “L”
4.20
±
0.025 V
S-8244AAEFN-CEE-T2
0V
Nch open drain active “H”
4.225
±
0.025 V
S-8244AAFFN-CEF-T2
CMOS output active “H”
4.35
±
0.025 V
0.045
±
0.02 V
S-8244AAGFN-CEG-T2
CMOS output active “H”
4.45
±
0.025 V
0.045
±
0.02 V
S-8244AAHFN-CEH-T2
CMOS output active “H”
4.30
±
0.025 V
0.25
±
0.07 V
S-8244AAIFN-CEI-T2
CMOS output active “H”
4.40
±
0.025 V
0.045
±
0.02 V
S-8244AAJFN-CEJ-T2
CMOS output active “H”
4.50
±
0.025 V
0.38
±
0.1 V
Remark
Please contact the SII marketing department for the products with the detection voltage value
other than those specified above.
Seiko Instruments Inc.
3
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
Rev.1.6
_00
S-8244 Series
Pin Configurations
8-Pin MSOP
Top view
VCC
SENSE
VC1
VC2
1
2
3
4
8
7
6
5
CO
ICT
VSS
VC3
Pin No.
1
2
3
4
5
6
Figure 2
Table 2
Symbol
Description
VCC Positive power input pin
SENSE Positive voltage connection pin of Battery 1
Negative voltage connection pin of Battery 1
VC1
Positive voltage connection pin of Battery 2
Negative voltage connection pin of Battery 2
VC2
Positive voltage connection pin of Battery 3
Negative voltage connection pin of Battery 3
VC3
Positive voltage connection pin of Battery 4
VSS
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
7
8
ICT
CO
Absolute Maximum Ratings
Table 3
Item
Input voltage between VCC and VSS
Delay capacitor connection pin voltage
Input pin voltage
CO output pin voltage (CMOS output)
(Nch open drain output)
(Pch open drain output)
Power dissipation
Operating ambient temperature
Storing temperature
Caution
Symbol
V
DS
V
ICT
V
IN
V
CO
P
D
T
opr
T
stg
(Ta
=
25
°
C unless otherwise specified
)
Applicable pin
Rating
Unit
VCC
V
V
SS
−
0.3 to V
SS
+
26
ICT
V
V
SS
−
0.3 to V
CC
+
0.3
SENSE, VC1, VC2, VC3
V
SS
−
0.3 to V
CC
+
0.3
V
CO
V
SS
−
0.3 to V
CC
+
0.3
V
V
SS
−
0.3 to 26
V
CC
−
26 to V
CC
+
0.3
300
mW
−
40 to
+
85
°
C
−
40 to
+
125
°
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.
4
Seiko Instruments Inc.
BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
Rev.1.6
_00
S-8244 Series
Electrical Characteristics
Table 4
(Ta
=
25
°C
unless otherwise specified)
Item
DETECTION VOLTAGE
Overcharge detection voltage 1
*1
Overcharge detection voltage 2
*1
Overcharge detection voltage 3
*1
Overcharge detection voltage 4
*1
V
CU1
V
CU2
V
CU3
V
CU4
V
CU1
−0.025
V
CU2
3.7 to 4.5 V Adjustment
−0.025
V
CU3
3.7 to 4.5 V Adjustment
−0.025
V
CU4
3.7 to 4.5 V Adjustment
−0.025
0.28
0.28
0.28
0.28
3.7 to 4.5 V Adjustment
Ta=−40 to
+85°C
C=0.1
µF
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
at I
OUT
=
10
µA
at I
OUT
=
10
µA
−0.4
1.0
3.6
V
CU1
V
CU2
V
CU3
V
CU4
0.38
0.38
0.38
0.38
0.0
1.5
1.5
1.2
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
2.0
24
V
V
V
V
V
V
V
V
mV/°C
s
V
1
2
3
4
1
2
3
4
5
6
6
6
6
6
7
7
1
1
1
1
1
1
1
1
2
3
3
3
3
3
4
4
Symbol
Conditions
Min.
Typ.
Max.
Measure- Measure-
Unit ment
ment
conditions circuit
Overcharge hysteresis voltage 1
*2
V
CD1
*2
Overcharge hysteresis voltage 2
V
CD2
*2
Overcharge hysteresis voltage 3
V
CD3
*2
Overcharge hysteresis voltage 4
V
CD4
Detection voltage temperature
T
COE
coefficient
*3
DELAY TIME
Overcharge detection delay time
t
CU
OPERATING VOLTAGE
Operating voltage between VCC
V
DSOP
and VSS
*4
CURRENT CONSUMPTION
Current consumption during normal
I
OPE
operation
Current consumption at power down I
PDN
VC1 sink current
I
VC1
VC2 sink current
I
VC2
VC3 sink current
I
VC3
*5
OUTPUT VOLTAGE
CO “H” voltage
CO “L” voltage
*
*
−0.3
−0.3
−0.3
V
CC
−0.05
3.0
2.4
0.3
0.3
0.3
V
SS
+0.05
µA
µA
µA
µA
µA
V
V
V
CO(H)
V
CO(L)
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
