S-8243A/B Series
www.sii-ic.com
© Seiko Instruments Inc., 2002-2010
BATTERY PROTECTION IC
FOR 3-SERIAL OR 4-SERIAL CELL PACK
Rev.3.0
_00
The S-8243A/B Series is a protection IC for lithium-ion rechargeable battery. The S-8243A Series protects 3-series, the S-8243B
Series protects 4-series cell pack from the overcharge, overdischarge, overcurrent voltages. This IC has a high-accuracy battery
protection circuit and a battery monitor amplifier, and also a voltage regulator which operates the microcomputer or gas gauge IC.
Combining this IC and a microcomputer or a gas gauge IC allows to display the amount of charge remained in a battery.
Features
(1)
High-accuracy voltage detection for each cell
•
Overcharge detection voltage n (n = 1 to 4)
3.9 V to 4.4 V (50 mV step)
Accuracy
±25
mV
•
Hysteresis voltage n (n = 1 to 4) of overcharge detection
−0.10
V to
−0.40
V (50 mV step) or 0 V
Accuracy
±50
mV
(Overcharge release voltage n (= Overcharge detection voltage n
+
Hysteresis voltage n) can be selected within
the range 3.8 V to 4.4 V.)
•
Overdischarge detection voltage n (n = 1 to 4)
2.0 V to 3.0 V (100 mV step)
Accuracy
±80
mV
•
Hysteresis voltage n (n = 1 to 4) of overdischarge detection
0.15 V to 0.70 V or 0 V (50 mV step)
Accuracy
±100
mV
(Overdischarge release voltage n (= Overdischarge detection voltage n
+
Hysteresis voltage n) can be selected
within the range 2.0 V to 3.4 V.)
(2) Three-level overcurrent protection including protection for short-circuiting
•
Overcurrent detection voltage 1
0.05 V to 0.3 V (50 mV step)
Accuracy
±25
mV
•
Overcurrent detection voltage 2
0.5 V
Accuracy
±100
mV
•
Overcurrent detection voltage 3
V
DD
/ 2
Accuracy
±15
%
(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by external
capacitors. (Delay times for overcurrent detection 2 and 3 are fixed internally.)
(4) Charge/discharge operation can be controlled through the control pins.
(5) High-accuracy battery monitor amp
GAMP = V
BATTERY
×
0.2
±1.0%
(6) Voltage regulator
V
OUT
= 3.3 V
±2.4
% (3 mA max.)
(7) High input-voltage device
Absolute maximum rating: 26 V
(8) Wide operating voltage range
6 V to 18 V
(9) Wide operating temperature range:
−40°C
to
+85°C
(10) Low current consumption
•
Operation mode
120
μA
max.
•
Power down mode
0.1
μA
max.
*1
(11) Lead-free, Sn 100%, halogen-free
*1.
Refer to “
Product Name Structure”
for details.
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium polymer rechargeable battery packs
Package
•
16-Pin TSSOP
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
Block Diagrams
1. S-8243A Series
Rev.3.0
_00
VDD
Battery protection
DOP
DOP,COP,
RVCM,RVSM
control
VREG
Voltage
regulator
COP
Delay
Delay
Delay
660 kΩ
200 nA
CTL1
VREG
1.4 MΩ
Delay
440 kΩ
CTL2
1.4 MΩ
VMP
660 kΩ
VREG
Battery
selection
1.4 MΩ
CTL3
1.4 MΩ
VREG
1.4 MΩ
VC1
CTL4
1.4 MΩ
VC2
Battery monitor amp
1 MΩ
5 MΩ
VBATOUT
5 MΩ
1 MΩ
VC3
CCT
CDT
VSS
Remark1.
Diodes in the figure are parasitic diodes.
2.
Numerical values are typical values.
Figure 1
2
Seiko Instruments Inc.
Rev.3.0
_00
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
2. S-8243B Series
VDD
Battery protection
DOP
DOP, COP,
RVCM, RVSM
control
VREG
Voltage
regulator
COP
Delay
Delay
Delay
660 kΩ
200 nA
CTL1
VREG
1.4 MΩ
Delay
440 kΩ
CTL2
1.4 MΩ
VMP
660 kΩ
VREG
Battery
selection
1.4 MΩ
CTL3
1.4 MΩ
VREG
1.4 MΩ
VC1
CTL4
1.4 MΩ
VC2
Battery monitor amp
1 MΩ
5 MΩ
VBATOUT
5 MΩ
1 MΩ
VC3
CCT
CDT
VSS
Remark1.
Diodes in the figure are parasitic diodes.
2.
Numerical values are typical values.
Figure 2
Seiko Instruments Inc.
3
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
Product Name Structure
1. Product Name
S-8243
x
xx
FT
-
TB
−
x
Rev.3.0
_00
Environmental code
U : Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
Package name (abbreviation)
FT: 16-Pin TSSOP
Serial code
*2
Sequentially set from AA to ZZ
Product series name
A : 3-cell
B : 4-cell
*1.
Refer to the tape specifications at the end of this book.
*2.
Refer to the “
3. Product Name List
”.
2. Package
Package Name
16-Pin TSSOP
Environmental code = G
Environmental code = U
Drawing Code
Tape
FT016-A-C-SD
FT016-A-C-SD
Package
FT016-A-P-SD
FT016-A-P-SD
Reel
FT016-A-R-SD
FT016-A-R-S1
3. Product Name List
Table 1 S-8243A Series (For 3-Serial Cell)
Overcharge
detection voltage
[V
CU
]
4.350
±0.025
V
4.350
±0.025
V
Hysteresis voltage for
overcharge detection
[V
HC
]
−0.15 ±0.05
V
−0.35 ±0.05
V
Overdischarge
detection voltage
[V
DL
]
2.40
±0.08
V
2.40
±0.08
V
Hysteresis voltage for
Overcurrent
0 V battery
overdischarge detection detection voltage1 charging
[V
HD
]
[V
IOV1
]
function
0.20
±0.10
V
0V
0.20
±0.025
V
0.20
±0.025
V
Available
Available
Product name / Item
S-8243AACFT-TB-x
S-8243AADFT-TB-x
Table 2 S-8243B Series (For 4-Serial Cell)
Overcharge
detection voltage
[V
CU
]
S-8243BADFT-TB-x
S-8243BAEFT-TB-x
S-8243BAFFT-TB-x
S-8243BAHFT-TB-x
4.350
±0.025
V
4.350
±0.025
V
4.250
±0.025
V
4.315
±0.025
V
Hysteresis voltage for
overcharge detection
[V
HC
]
−0.25 ±0.05
V
−0.15 ±0.05
V
−0.25 ±0.05
V
−0.20 ±0.05
V
Overdischarge
detection voltage
[V
DL
]
2.40
±0.08
V
2.40
±0.08
V
2.40
±0.08
V
2.00
±0.08
V
Hysteresis voltage for
Overcurrent
0 V battery
overdischarge detection detection voltage1 charging
[V
HD
]
[V
IOV1
]
function
0V
0.20
±0.10
V
0V
0.15
±0.10
V
0.25
±0.025
V
0.20
±0.025
V
0.20
±0.025
V
0.20
±0.025
V
Available
Available
Available
Available
Product name / Item
Remark 1.
Change in the detection voltage is available in products other than listed above. Contact our sales office.
2.
x: G or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
4
Seiko Instruments Inc.
Rev.3.0
_00
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
Pin Configuration
16-Pin TSSOP
Top view
VDD
DOP
COP
VMP
VC1
VC2
VC3
VSS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VREG
CTL1
CTL2
CTL3
CTL4
VBATOUT
CCT
CDT
Figure 3
Table 3 Pin description (S-8243A Series)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
VDD
DOP
COP
VMP
VC1
VC2
VC3
VSS
CDT
CCT
VBATOUT
CTL4
CTL3
CTL2
CTL1
VREG
Description
Input pin for positive power supply, Connection pin for battery 1’s positive voltage
Connection pin for discharge control FET gate (CMOS output)
Connection pin for charge control FET gate (Nch open drain output)
Pin for voltage detection between VDD-VMP pin (Pin for overcurrent detection)
No connection
Connection pin for battery 1’s negative voltage, for battery 2’s positive voltage
Connection pin for battery 2’s negative voltage, for battery 3’s positive voltage
Input pin for negative power supply, Connection pin for battery 3’s negative voltage
Connection pin to capacitor for overdischarge detection delay, for overcurrent detection delay 1
Connection pin to capacitor for overcharge detection delay
Output pin for battery voltage and offset voltage
Pin for selecting output from VBATOUT pin
Pin for selecting output from VBATOUT pin
Control pin for charge / discharge FET
Control pin for charge / discharge FET
Output pin for voltage regulator (3.3 V)
Table 4 Pin description (S-8243B Series)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
VDD
DOP
COP
VMP
VC1
VC2
VC3
VSS
CDT
CCT
VBATOUT
CTL4
CTL3
CTL2
CTL1
VREG
Description
Input pin for positive power supply, Connection pin for battery 1’s positive voltage
Connection pin for discharge control FET gate (CMOS output)
Connection pin for charge control FET gate (Nch open drain output)
Pin for voltage detection between VDD-VMP pin (Pin for overcurrent detection)
Connection pin for battery 1’s negative voltage, for battery 2’s positive voltage
Connection pin for battery 2’s negative voltage, for battery 3’s positive voltage
Connection pin for battery 3’s negative voltage, for battery 4’s positive voltage
Input pin for negative power supply, Connection pin for battery 4’s negative voltage
Connection pin to capacitor for overdischarge detection delay, for overcurrent detection delay 1
Connection pin to capacitor for overcharge detection delay
Output pin for battery voltage and offset voltage
Pin for selecting output from VBATOUT pin
Pin for selecting output from VBATOUT pin
Control pin for charge / discharge FET
Control pin for charge / discharge FET
Output pin for voltage regulator (3.3 V)
Seiko Instruments Inc.
5
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