Rev.3.1
_00
BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK)
S-8233C SERIES
The 8233C is a series of lithium-ion rechargeable battery protection ICs
incorporating high-accuracy voltage detection circuits and delay
circuits. The 8233C output signals according to battery voltage.
It is suitable for a 3-serial-cell lithium-ion battery pack.
Features
(1)
Internal high-accuracy voltage detection circuit
Over charge detection voltage
Over charge release voltage
3.80
±
0.05 V to 4.40
±
0.05 V
5 mV - step
3.45
±
0.10 V to 4.40
±
0.10 V
5 mV - step
(The over charge release voltage can be selected within the range where a difference from over
charge detection voltage is 0 to 0.35 V at 50 mV - Step)
Over discharge detection voltage
Over discharge release voltage
2.00
±
0.08 V to 2.80± 0.08 V
50 mV - step
2.00
±
0.10 V to4.00± 0.10 V
50 mV - step
(The over discharge release voltage can be selected within the range where a difference from
over discharge detection voltage is 0 to 1.2V at 50 mV - Step)
Over current detection voltage 1
0.15 V±10% to 0.50 V±10%
50 mV - step
(2) High input-voltage device (absolute maximum rating: 26 V)
(3) Indicates Li-ion battery state.
(4) Wide operating voltage range:
2 V to 24 V
(5) The delay time for every detection can be set via an external capacitor.
(6) Three over current detection levels (protection for short-circuiting)
(7) Internal charge/discharge prohibition circuit via the control terminal
(8) The function for charging batteries from 0 V is available.
(9) Low current consumption
Operation
Power-down
(10) 16-pin TSSOP package
50
µA
max (+25
°C)
0.1
µA
max (+25
°C)
Applications
Lithium-ion rechargeable battery packs
Seiko Instruments Inc.
1
Battery Protection IC(for a 3-serial-cell pack)
S-8233C Series
Rev.3.1_
00
Selection Guide
Table1
Model/Item
Over charge
detection voltage
S-8233CAFT
4.25±0.05V
Over charge
release voltage
4.05±0.10V
Over discharge
detection voltage
2.00±0.08V
Over discharge
release voltage
2.30±0.10V
Over current
0V battery
detection voltage1 charging function
0.25V±10%
-
Change in the detection voltage is available in products other than the above listed ones.
Contact the SII Semiconductor Products Sales Department.
2
Seiko Instruments Inc.
Rev.3.1_
00
Battery Protection IC(for a 3-serial-cell pack)
S-8233C Series
Block Diagram
VCC
Reference
voltage 1
Over current
2,3 delay circuit
Over current
detection
circuit
VMP
+
-
CSO
Battery 1
Over charge
+
-
Battery 1
Over discharge
Over current‚P
delay circuit
COVT
VC1
Battery 1
Over charge
Over discharge
delay circuit
CDT
+
-
ISO
Control
Logic
Battery 2
Over charge
Over charge
delay circuit
+
Battery 2
Over discharge
Reference
voltage 2
CCT
-
VC2
Battery 2
Over charge
DOP
+
-
DSO
Battery 3
Over charge
+
Battery 3
Over discharge
Reference
voltage 3
COP
-
VSS
Battery 3
Over charge
Floating
detection circuit
CTL
Figure 1
The delay time for over current detection 2 and 3 is fixed by an internal IC circuit. The delay time
cannot be changed via an external capacitor.
1.
If one of the battery voltages becomes higher than the over charge detection voltage (VCU), the
CSO terminal goes high.
2.
If one of the battery voltages becomes lower than the over discharge detection voltage (VDD), the
ISO terminal goes high.
3.
If S-8233C series detect over current, the ISO terminal goes high.
In normal state each terminal output
‘Low’.
Seiko Instruments Inc.
3
Battery Protection IC(for a 3-serial-cell pack)
S-8233C Series
Rev.3.1_
00
Pin Assignment
Top View
Pin Description
Table2
No.
Name
DOP
COP
VMP
Description
Connects FET gate for discharge control (CMOS output)
Connects FET gate for charge control (Nch open-drain output)
Detects voltage between VCC to VMP(Over current detection pin)
1
3
4
5
6
7
8
9
10
11
DOP
NC
COP
VMP
COVT
CDT
CCT
VSS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
NC
CSO
VC1
ISO
VC2
DSO
CTL
COVT Connects capacitor for over current detection1delay circuit
CDT
CCT
VSS
CTL
DSO
VC2
ISO
VC1
CSO
VCC
N.C.
Connects capacitor for over discharge detection delay circuit
Connects capacitor for over charge detection delay circuit
Negative power input, and connects negative voltage for battery 3
Charge/discharge control signal input
Over discharge condition signal output
Connects battery 2 negative voltage and battery 3 positive voltage
Over current condition signal output
Connects battery 1 negative voltage and battery 2 positive voltage
Over voltage condition signal output
Positive power input and connects battery 1 positive voltage
Non connect
TSSOP-16
Figure 2
12
13
14
16
2,15
Absolute Maximum Ratings
Table3
Item
Input voltage between VCC and VSS
Input terminal voltage
VMP Input terminal voltage
CSO,ISO,DSO output terminal voltage
DOP output terminal voltage
COP output terminal voltage
Power dissipation
Operating temperature range
Storage temperature range
Sym.
VDS
VIN
VVMP
VOUT
VDOP
VCOP
PD
Topr
Tstg
VC1,VC2,CTL,CCT,CDT,COVT
VMP
CSO,ISO,DSO
DOP
COP
TSSOP-16PKG
Applied Pins
Rating
VSS-0.3 to VSS+26
VSS-0.3 to VCC+0.3
VSS-0.3 to VSS+26
VSS-0.3 to VCC+0.3
VSS-0.3 to VCC+0.3
VSS-0.3 to VMP+0.3
300
-20 to +70
-40 to +125
Ta = 25°C
Unit
V
V
V
V
V
V
mW
°C
°C
4
Seiko Instruments Inc.
Rev.3.1_
00
Battery Protection IC(for a 3-serial-cell pack)
S-8233C Series
Electrical Characteristics
Table 4
Item
Detection voltage
Over charge detection
voltage1
Over charge release
voltage1
Over discharge detection
voltage1
Over discharge release
voltage1
Over charge detection
voltage2
Over charge release
voltage2
Over discharge detection
voltage2
Over discharge release
voltage2
Over charge detection
voltage3
Over charge release
voltage3
Over discharge detection
voltage3
Over discharge release
voltage3
Over current detection
voltage1
Over current detection
voltage2
Over current detection
voltage3
Voltage temperature
factor 1
Voltage temperature
factor 2
Delay time
Over charge detection
delay time1
Over charge detection
delay time2
Over charge detection
delay time3
Over discharge detection
delay time1
Over discharge detection
delay time2
Over discharge detection
delay time3
Over current detection
delay time1
Over current detection
delay time2
Over current detection
delay time3
Operating voltage
Operating voltage
between VCC and VSS
Symbol
condition Test
circuit
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
Notice
Min.
Typ.
Max.
Ta = 25°C
Unit
VCU1
VCD1
VDD1
VDU1
VCU2
VCD2
VDD2
VDU2
VCU3
VDSO
VDD3
VDU3
VIOV1
VIOV2
VIOV3
TCOE1
TCOE2
4.10 to 4.35
Adjustment
3.85 to 4.35
Adjustment
2.00 to 2.70
Adjustment
2.00 to 3.70
Adjustment
4.10 to 4.35
Adjustment
3.85 to 4.35
Adjustment
2.00 to 2.70
Adjustment
2.00 to 3.70
Adjustment
4.10 to 4.35
Adjustment
3.85 to 4.35
Adjustment
2.00 to 2.70
Adjustment
2.00 to 3.70
Adjustment
(*4)0.15 to 0.50V
Adjustment
VCC Reference
VSS Reference
(*1)Ta=-20 to 70°C
(*2)Ta=-20 to 70°C
VCU1-0.05
VCD1-0.10
VDD1-0.08
VDU1-0.10
VCU2-0.05
VCD2-0.10
VDD2-0.08
VDU2-0.10
VCU3-0.05
VDSO-0.10
VDD3-0.08
VDU3-0.10
VIOV1×0.9
0.54
1.0
-1.0
-0.5
VCU1
VCD1
VDD1
VDU1
VCU2
VCD2
VDD2
VDU2
VCU3
VDSO
VDD3
VDU3
VIOV1
0.6
2.0
0
0
VCU1+0.05
VCD1+0.10
VDD1+0.08
VDU1+0.10
VCU2+0.05
VCD2+0.10
VDD2+0.08
VDU2+0.10
VCU3+0.05
VDSO+0.10
VDD3+0.08
VDU3+0.10
VIOV1×1.1
0.66
3.0
1.0
0.5
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mV/°C
mV/°C
tCU1
tCU2
tCU3
tDD1
tDD2
tDD3
tIOV1
tIOV2
tIOV3
9
10
11
9
10
11
12
12
12
6
6
6
6
6
6
7
7
7
CCCT=0.47µF
CCCT=0.47µF
CCCT=0.47µF
CCDT=0.1µF
CCDT=0.1µF
CCDT=0.1µF
CCOVT=0.1µF
0.5
0.5
0.5
20
20
20
10
2
1.0
1.0
1.0
40
40
40
20
4
300
1.5
1.5
1.5
60
60
60
30
8
550
S
S
S
mS
mS
mS
mS
mS
µS
FET gate capacitor
=2000pF
(*3)
100
VDSOP
2.0
-
24
V
Seiko Instruments Inc.
5
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