Rev.4.5
_00
BATTERY PROTECTION IC
FOR 1-CELL PACK
S-8211D Series
The S-8211D Series are protection ICs for single-cell lithium-ion
/ lithium-polymer rechargeable batteries and include high-
accuracy voltage detectors and delay circuits.
These ICs are suitable for protecting single-cell rechargeable
lithium-ion / lithium-polymer battery packs from overcharge,
overdischarge, and overcurrent.
Features
(1) High-accuracy voltage detection circuit
•
Overcharge detection voltage
Accuracy
±25
mV (+25
°C)
Accuracy
±30
mV (−5 to
+55 °C)
*1
•
Overcharge release voltage
3.8 to 4.4 V
Accuracy
±50
mV
•
Overdischarge detection voltage
2.0 to 3.0 V (10 mV steps)
Accuracy
±50
mV
*2
Accuracy
±100
mV
•
Overdischarge release voltage
2.0 to 3.4 V
•
Discharge overcurrent detection voltage
0.05 to 0.30 V (10 mV steps)
Accuracy
±15
mV
•
Load short-circuiting detection voltage
0.5 V (fixed)
Accuracy
±200
mV
Detection delay times are generated by an internal circuit (external capacitors are unnecessary).
Accuracy
±20%
High-withstanding-voltage device is used for charger connection pins (VM pin and CO pin : Absolute maximum
rating = 28 V)
0 V battery charge function available / unavailable are selectable.
Shutdown function yes / no are selectable.
Wide operating temperature range
−40
to
+85 °C
Low current consumption
•
Operation mode
3.0
µ
A typ., 5.5
µ
A max. (+25
°C)
•
Power-down mode
0.2
µ
A max. (+25
°C)
Small package:
SOT-23-5, SNT-6A
Lead-free product
3.9 to 4.4 V (5 mV steps)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
*1.
Overcharge release voltage = Overcharge detection voltage
−
Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected as 0 V or from a range of 0.1 to 0.4 V in 50 mV steps.)
*2.
Overdischarge release voltage = Overdischarge detection voltage
+
Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage can be selected as 0 V or from a range of 0.1 to 0.7 V in 100 mV steps.)
Applications
•
Lithium-ion rechargeable battery packs
•
Lithium-polymer rechargeable battery packs
Packages
Package Name
SOT-23-5
SNT-6A
Drawing Code
Package
MP005-A
PG006-A
Tape
MP005-A
PG006-A
Reel
MP005-A
PG006-A
Land
−
PG006-A
Seiko Instruments Inc.
1
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8211D Series
Block Diagram
Output control circuit
0 V battery charge circuit
or 0 V battery charge
inhibition circuit
Oscillator control
circuit
Rev.4.5
_00
DO
Divider control
circuit
VDD
CO
Charger detection circuit
+
−
R
VMD
Discharge overcurrent detection
comparator
Overcharge
detection
comparator
+
−
VM
R
VMS
+
−
+
−
Load short-circuiting detection
comparator
Overdischarge
detection
comparator
VSS
Remark
All diodes shown in figure are parasitic diodes.
Figure 1
2
Seiko Instruments Inc.
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8211D Series
2 Product Name List
(1) SOT-23-5
Table 1
Overcharge
Detection
Voltage
V
CU
4.250 V
4.280 V
4.275 V
4.325 V
4.280 V
4.280 V
4.280 V
4.275 V
Overcharge Over-discharge Over-discharge
Release
Detection
Release
Voltage
Voltage
Voltage
V
CL
V
DL
V
DU
4.050 V
4.180 V
4.175 V
4.075 V
4.080 V
4.080 V
4.080 V
4.075 V
2.60 V
2.50 V
2.30 V
2.50 V
3.00 V
2.30 V
2.80 V
2.50 V
2.90 V
2.70 V
2.40 V
2.90 V
3.00 V
2.30 V
2.80 V
2.90 V
Discharge
Overcurrent
Detection
Voltage
V
DIOV
0.12 V
0.19 V
0.10 V
0.15 V
0.08 V
0.13 V
0.10 V
0.15 V
0 V Battery
Charge
Function
Unavailable
Unavailable
Available
Unavailable
Available
Unavailable
Available
Unavailable
Rev.4.5
_00
Product Name / Item
Delay Time
Combination
*1
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
Shutdown
Function
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
S-8211DAB-M5T1G
S-8211DAE-M5T1G
S-8211DAH-M5T1G
S-8211DAI-M5T1G
S-8211DAJ-M5T1G
S-8211DAK-M5T1G
S-8211DAL-M5T1G
S-8211DAM-M5T1G
*1.
Refer to the
Table 3
about the details of the delay time combinations (1).
Remark
Please contact our sales office for the products with detection voltage value other than those specified
above.
(2) SNT-6A
Table 2
Overcharge
Detection
Voltage
V
CU
4.250 V
4.280 V
4.250 V
4.280 V
Overcharge Over-discharge Over-discharge
Release
Detection
Release
Voltage
Voltage
Voltage
V
CL
V
DL
V
DU
4.050 V
4.180 V
4.050 V
4.080 V
2.60 V
2.50 V
2.40 V
2.30 V
2.90 V
2.70 V
2.90 V
2.30 V
Discharge
Overcurrent
Detection
Voltage
V
DIOV
0.12 V
0.19 V
0.10 V
0.08 V
0 V Battery
Charge
Function
Unavailable
Unavailable
Available
Available
Delay Time
Combination
*1
(1)
(1)
(2)
(1)
Shutdown
Function
No
Yes
No
No
Product Name / Item
S-8211DAB-I6T1G
S-8211DAE-I6T1G
S-8211DAF-I6T1G
S-8211DAG-I6T1G
*1.
Refer to the
Table 3
about the details of the delay time combinations (1) and (2).
Remark
Please contact our sales office for the products with detection voltage value other than those specified
above.
4
Seiko Instruments Inc.
Rev.4.5
_00
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8211D Series
Table 3
Delay Time
Combination
(1)
(2)
Remark
Overcharge
Detection
Delay Time
t
CU
1.2 s
1.2 s
Overdischarge
Detection
Delay Time
t
DL
150 ms
75 ms
Discharge Overcurrent
Detection
Delay Time
t
DIOV
9 ms
9 ms
Load Short-circuiting
Detection
Delay Time
t
SHORT
300
µs
300
µs
The delay times can be changed within the range listed
Table 4.
For details, please contact our sales office.
Table 4
Delay Time
Overcharge detection delay time
Overdischarge detection delay time
Discharge overcurrent detection delay time
Load short-circuiting detection delay time
Remark
Symbol
t
CU
t
DL
t
DIOV
t
SHORT
Selection Range
143 ms
38 ms
4.5 ms
−
573 ms
150 ms
9 ms
300
µs
1.2 s
300 ms
18 ms
560
µs
Remark
Select a value from the left.
Select a value from the left.
Select a value from the left.
Select a value from the left.
The value surrounded by bold lines is the delay time of the standard products.
Seiko Instruments Inc.
5
Analog electronics
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