FS326
One Cell Lithium-ion/Polymer Battery Protection IC
General Description
FS326 is a series of lithium-ion and lithium-polymer
rechargeable battery protection ICs with high accurate
voltage detection and delay circuits.
These ICs are suitable for protection of single cell
lithium-ion or lithium polymer battery packs from over
charge, over discharge and over current.
Ordering Information
FS326
x
Serial code from A to G *
*: Refer to the product name list on next page.
FS326
x-P
(P stands for Pb-free)
Serial code from A to H *
Features
Low supply current
Normal Operation : 3.0μA typ. @VDD=3.9V
Power-down mode : 0.1μA max. @VDD=2.0V
Overcharge detection voltage
﹝V
OCU
﹞
4.2V~4.4V, Accuracy of
±25mV
Overcharge release voltage
3.8V~4.2V, Accuracy of
±50mV
﹝V
OCR
﹞
Overdischarge detection voltage
2.2V~2.9V, Accuracy of
±50*mV
﹝V
ODL
﹞
Overdischarge release voltage
2.4V~3.2V, Accuracy of
±50*mV
﹝V
ODR
﹞
Over current detection voltage
﹝V
OI1
﹞
0.05V~0.2V, Accuracy of
±30mV
Short circuit detection voltage
Fixed at 1.35V
﹝V
OI2
﹞
Delay times are generated by an internal
circuit. (External capacitors are unnecessary.)
Charger detection voltage
-0.7V
Reset resistance for Over current protection
>500kΩ
Wide supply voltage range
Small package
1.8 ~ 9.0V
SOT-23-6
*: Refer to the product name list on next page.
Applications
Protection IC for One-Cell Lithium-Ion /
Lithium-Polymer Battery Pack
*:
±50mV
for F version, others are
±80mV.
Fortune Semiconductor Corp.
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
1/18
FS326-DS-17_EN
Rev. 1.7
Jul, 2006
http://www.fsc.com.tw
FS326
One Cell Lithium-ion/Polymer Battery Protection IC
Product Name List
Package
Model
SOT-23-6
A
B
C
D
FS326
E
F
G
H
4.300±0.040
4.275±0.025
4.280±0.025
4.250±0.025
4.080±0.05
4.175±0.05
4.175±0.05
4.075±0.05
2.50±0.08
2.30±0.05
2.90±0.08
2.30±0.05
2.90±0.08
2.42±0.05
3.00±0.08
2.90±0.05
150±30
100±30
150±30
150±30
Overcharge
detection
voltage
[V
OCU
] (V)
4.325±0.025
4.350±0.025
4.325±0.025
4.300±0.025
Overcharge
release
voltage
[V
OCR
] (V)
4.075±0.05
4.150±0.05
4.075±0.05
4.080±0.05
Overdischarge Overdischarge
detection
release
voltage
voltage
[V
ODL
] (V)
[V
ODR
] (V)
2.50±0.08
2.30±0.08
2.50±0.08
2.50±0.08
2.90±0.08
3.00±0.08
2.90±0.08
2.90±0.08
Overcurrent
detection
voltage
[V
OI1
] (mV)
100±30
100±30
150±30
150±30
Overcharge, overdischarge and overcurrent detection voltages can be changed at the customer’s request.
Pin Configuration
Pin No. Symbol
1
2
3
4
5
6
OD
CSI
OC
DS
VDD
VSS
Description
6
5
4
FET gate connection pin for discharge control
Input pin for current sense, charger detect
FET gate connection pin for charge control
Test pin for reduce delay time
Positive power input pin
Negative power input pin
1
SOT-23-6
TOP VIEW
2
3
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
2/18
FS326-DS-17_EN
Rev. 1.7
Jul, 2006
FS326
One Cell Lithium-ion/Polymer Battery Protection IC
Functional Block Diagram
VDD
DS
VSS
Short circuit
Detector
Oscillator
Control
Circuit
Over current
Detector
Divider
Control Logic
Charger
Detector
VSS
Overcharge
Detector
VSS
CSI
Overdischarge
Detector
VSS
VSS
VSS
Control Logic
OD
Typical Application Circuit
VBAT+
R1
100 ~ 470Ω
VDD
DS
C1
0.1µ F
FS326 Series
CSI
OD
OC
VSS
OC
M1
M2
R2
1kΩ
VBAT-
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
3/18
FS326-DS-17_EN
Rev. 1.7
Jul, 2006
FS326
One Cell Lithium-ion/Polymer Battery Protection IC
Absolute Maximum Ratings
(VSS=0V, Ta=25°C unless otherwise specified)
Item
Input voltage between VDD and VSS *
OC output pin voltage
OD output pin voltage
CSI input pin voltage
DS input pin voltage
Operating Temperature Range
Storage Temperature Range
Symbol
V
DD
V
OC
V
OD
V
CSI
V
DS
T
OP
T
ST
Rating
V
SS
-0.3 to V
SS
+12
V
DD
-24 to V
DD
+0.3
V
SS
-0.3 to V
DD
+0.3
V
DD
-24 to V
DD
+0.3
V
SS
-0.3 to V
DD
+0.3
-40 to +85
-40 to +125
Unit
V
V
V
V
V
°C
°C
Note: FS326 contains a circuit that will protect it from static discharge; but please take special care that no
excessive static electricity or voltage which exceeds the limit of the protection circuit will be applied to it.
* Pulse (μsec) noise exceeding the above input voltage (V
SS
+12V) may cause damage to the IC.
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
4/18
FS326-DS-17_EN
Rev. 1.7
Jul, 2006
FS326
One Cell Lithium-ion/Polymer Battery Protection IC
Electrical Characteristics (except FS326G)
(V
SS
=0V, DS=Floating, Ta=25°C unless otherwise specified)
PARAMETER
CURRENT CONSUMPTION
Supply Current
Power-Down Current
OPERATING VOLTAGE
Operating input voltage
DETECTION VOLTAGE
Overcharge detection voltage
Overcharge release voltage
Overdischarge detection voltage
Overdischarge release voltage
Over current detection voltage
Short circuit detection voltage
Reset resistance for Over current
protection
Charger detection voltage
DELAY TIME
Overcharge detection delay time
V
DD=3.6V to 4.4V
T
OC
T
OD
T
OI1
T
OI2
5
1.3
180
10
10
1.9
260
15
50
s
ms
ms
μs
V
DD
=3.0V
V
DD
=3.6V
V
OCU
V
OCR
V
ODL
V
ODR
V
OI1
V
OI2
Rshort
V
CH
V
OCU
-0.025
V
OCR
-0.050
V
ODL
-0.080*
V
ODR
-0.080*
V
OI1
-0.030
1.0
400
-1.2
V
OCU
V
OCR
V
ODL
V
ODR
V
OI1
1.35
500
-0.7
V
OCU
+0.025
V
OCR
+0.050
V
ODL
+0.080*
V
ODR
+0.080*
V
OI1
+0.030
1.7
600
-0.2
V
V
V
V
V
V
kΩ
V
V
DD
-V
SS
V
DS1
1.8
9.0
V
V
DD
=3.9V
V
DD
=2.0V
I
DD
I
PD
3.0
6.0
0.1
μA
μA
CONDITIONS
SYMBOL
Min
Typ
Max
UNIT
Overdischarge detection delay time V
DD=3.6V to 2.0V
Over current detection delay time V
DD=3.0V
Short circuit detection delay time
OTHER
OC pin output “H” voltage
OC pin output “L” voltage
OD pin output “H” voltage
OD pin output “L” voltage
V
DD=3.9V,
I
oh=-50μA
V
DD=4.5V, CSI=0V
V
DD=3.9V,
I
oh=-50μA
V
DD=2.0V,
I
ol=50μA
V
DD=3.0V
Voh1
Vol1
Voh2
Vol2
3.4
3.7
0.1
0.5
V
V
V
0.5
V
3.4
3.7
0.1
*:
For FS326F, the accuracy is
±0.05V.
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
5/18
FS326-DS-17_EN
Rev. 1.7
Jul, 2006
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