Rev.5.0
_00
BATTERY PROTECTION IC
FOR 1-CELL PACK
S-8211C Series
The S-8211C 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
•
Charge overcurrent detection voltage
−0.1
V (fixed)
Accuracy
±30
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.
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)
*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-8211C Series
Block Diagram
Output control circuit
0 V battery charge circuit
or 0 V battery charge
inhibition circuit
Oscillator control
circuit
Rev.5.0
_00
DO
Divider control
circuit
VDD
CO
Charger detection circuit
+
−
R
VMD
Discharge overcurrent detection
comparator
Overcharge
detection
comparator
+
−
VM
R
VMS
+
−
Charge overcurrent detection
comparator
+
−
Overdischarge
detection
comparator
Load short-circuiting detection
comparator
VSS
+
−
Remark
All diodes shown in figure are parasitic diodes.
Figure 1
2
Seiko Instruments Inc.
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