Rev.1.4
_00
BATTERY PROTECTION IC
FOR 2-SERIAL-CELL PACK
S-8242 Series
The S-8242 Series are protection ICs for 2-serial-cell
lithium-ion/lithium-polymer rechargeable batteries and
include high-accuracy voltage detectors and delay
circuits.
These ICs are suitable for protecting 2-cell rechargeable
lithium-ion / lithium-polymer battery packs from
overcharge, overdischarge, and overcurrent.
Features
(1) High-accuracy voltage detection for each cell
•
Overcharge detection voltage n (n
=
1, 2)
•
Overcharge release voltage n (n
=
1, 2)
•
Overdischarge detection voltage n (n
=
1, 2)
•
Overdischarge release voltage n (n
=
1, 2)
3.9 V to 4.4 V (50 mV steps)
3.8 V to 4.4 V
*1
2.0 V to 3.0 V (100 mV steps)
2.0 V to 3.4 V
*2
Accuracy
±25
mV
Accuracy
±50
mV
Accuracy
±50
mV
Accuracy
±100
mV
*1.
Overcharge release voltage
=
Overcharge detection voltage
−
Overcharge hysteresis voltage
(Overcharge hysteresis voltage n (n
=
1, 2) can be selected as 0 V or from a range of 0.1 V to
0.4 V in 50 mV steps.)
*2.
Overdischarge release voltage
=
Overdischarge detection voltage
+
Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage n (n
=
1, 2) can be selected as 0 V or from a range of 0.1 V to
0.7 V in 100 mV steps.)
(2) Two-level overcurrent detection (overcurrent 1, overcurrent 2)
•
Overcurrent detection voltage 1 0.05 V, 0.08 V to 0.30 V (10 mV steps)
Accuracy
±15
mV
•
Overcurrent detection voltage 2 1.2 V (fixed)
Accuracy
±300
mV
(3) Delay times (overcharge, overdischarge, overcurrent) are generated by an internal circuit (external
capacitors are unnecessary).
(4) 0 V battery charge function available/unavailable are selectable.
(5) Charger detection function
•
The overdischarge hysteresis is released by detecting negative voltage at the VM pin (−0.7 V typ.).
(Charger detection function)
(6) High-withstanding-voltage devices Absolute maximum rating: 28 V
(7) Wide operating temperature range
−40°C
to
+85 °C
(8) Low current consumption
Operation mode
10
µA
max. (+25°C)
Power-down mode
0.1
µA
max. (+25°C)
(9) Small package
SOT-23-6W, 6-Pin SNB(B)
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium-polymer rechargeable battery packs
Packages
Package Name
SOT-23-6W
6-Pin SNB (B)
Package
MP006-B
BD006-A
Drawing Code
Tape
MP006-B
BD006-A
Reel
MP006-B
BD006-A
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242 Series
Block Diagram
Rev.1.4
_00
DO
Delay circuit, controller,
0 V battery charge/
charge inhibition circuit
−
+
+
−
VDD
CO
+
−
+
−
VC
−
+
+
−
300 kΩ
VM
10 kΩ
Charger
detector
VSS
Remark
All the diodes in the figure are parasitic diodes.
Figure 1
2
Seiko Instruments Inc.
Rev.1.4
_00
Product Name Structure
1. Product Name
S−8242A
xx
−
xxxx
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242 Series
Package code and packing specifications of IC
*1
M6T2:
SOT-23-6W,
Tape products
B6T1:
6-Pin SNB (B),
Tape products
Serial code
Sequentially set from AA to ZZ
*1.
Refer to the taping drawing.
2. Product Name List
Table 1
Overcharge
Overdischarge
Overcurrent
Overcharge
Overdischarge
0 V Battery
Detection
Detection
Detection
Product Name / Item
Release Voltage
Release Voltage
Charge
Voltage
Voltage
Voltage 1
(V
CL
)
(V
DU
)
(V
CU
)
(V
DL
)
(V
IOV1
)
Unavailable
S-8242AAA-B6T1
4.325 V
4.075 V
2.2 V
2.9 V
0.21 V
Unavailable
S-8242AAA-M6T2
4.325 V
4.075 V
2.2 V
2.9 V
0.21 V
Available
S-8242AAD-M6T2
4.350 V
4.150 V
2.3 V
3.0 V
0.30 V
Available
S-8242AAE-M6T2
4.300 V
4.050 V
2.0 V
2.7 V
0.20 V
Unavailable
S-8242AAF-M6T2
4.300 V
4.100 V
2.4 V
3.0 V
0.20 V
Available
S-8242AAG-M6T2
4.350 V
4.150 V
2.4 V
3.0 V
0.30 V
Unavailable
S-8242AAH-M6T2
4.350 V
4.150 V
2.3 V
3.0 V
0.30 V
Unavailable
S-8242AAJ-B6T1
4.325 V
4.075 V
2.2 V
2.4 V
0.19 V
Unavailable
S-8242AAK-M6T2
4.280 V
4.130 V
2.4 V
2.9 V
0.15 V
Unavailable
S-8242AAL-B6T1
4.280 V
4.080 V
2.2 V
2.9 V
0.10 V
4.300 V
4.100 V
2.0 V
2.0 V
0.20 V
S-8242AAM-B6T1
Available
4.300 V
4.100 V
2.0 V
2.0 V
0.20 V
S-8242AAM-M6T2
Available
4.350 V
4.100 V
2.3 V
3.0 V
0.10 V
S-8242AAN-M6T2
Available
4.350 V
4.100 V
2.4 V
3.0 V
0.15 V
S-8242AAO-M6T2
Available
4.325 V
4.075 V
2.2 V
2.4 V
0.17 V
S-8242AAP-B6T1
Unavailable
Remark
Please contact the SII marketing department for the products with detection voltage value other than
those specified above.
Seiko Instruments Inc.
3
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242 Series
Pin Configurations
SOT-23-6W
Top view
6
5
4
Rev.1.4
_00
Table 2
1
2
3
Figure 2
6-Pin SNB(B)
Top view
6 5 4
Pin description
Connection of discharge control FET gate
1
DO
(CMOS output)
Connection of charge control FET gate
2
CO
(CMOS output)
Voltage detection between VM and VSS
3
VM
(overcurrent/charger detection pin)
Connection for negative voltage of battery 1
4
VC
and positive voltage of battery 2
Connection for positive power supply input
5
VDD
and positive voltage of battery 1
Connection for negative power supply input
6
VSS
and negative voltage of battery 2
Remark
For the external views, refer to the package drawings.
Table 3
Pin No.
Pin Name
1
2
3
Bottom view
1 2 3
*1
Pin description
Voltage detection between VM and VSS
1
VM
(overcurrent/charger detection pin)
Connection of charge control FET gate
2
CO
(CMOS output)
Connection of discharge control FET gate
3
DO
(CMOS output)
Connection for negative power supply input
4
VSS
and negative voltage of battery 2
Connection for negative voltage of battery 1
5
VC
and positive voltage of battery 2
Connection for positive power supply input
6
VDD
and positive voltage of battery 1
Remark
For the external views, refer to the package drawings.
Pin No.
Pin Name
*1.
6 5 4
Connect the heatsink of
back side at shadowed
area to the board, and set
electric potential open or
VDD.
However, do not use it as
the function of electrode.
Figure 3
4
Seiko Instruments Inc.
Rev.1.4
_00
Absolute Maximum Ratings
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8242 Series
Table 4
(Ta
=
25
°
C unless otherwise specified)
Item
Symbol
Applied pin Absolute Maximum Ratings
Unit
*1
VDD
Input voltage between VDD and VSS
V
DS
V
V
SS
−
0.3 to V
SS
+
12
VC
VC input pin voltage
V
VC
V
SS
−
0.3 to V
DD
+
0.3
VM
VM pin input voltage
V
VM
V
DD
−
28 to V
DD
+
0.3
DO
DO pin output voltage
V
DO
V
SS
−
0.3 to V
DD
+
0.3
CO
CO pin output voltage
V
CO
V
VM
−
0.3 to V
DD
+
0.3
Power dissipation
P
D
SOT-23-6W
300
mW
6-Pin SNB (B)
90
Operating ambient temperature
Topr
°C
−
40 to
+
85
Storage temperature
Tstg
−
55 to
+
125
*1.
Even pulse (
µ
s) noise exceeding the above input voltage (V
SS
+
12 V) may damage the IC, so do not allow
such noise to be applied.
Caution 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.
5
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