View FS312_457855.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

FS312
Lithium-ion/Polymer Battery Protection IC
General Description
FS312 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
FS312 x Serial code from AR to FR * *: Refer to the product name list on next page.
Features
Low supply current Normal Operation : 3.0A typ. @VDD=3.9V Power-down mode : 0.3A max. @VDD=2.0V Overcharge detection voltage VOCU 4.0V~4.4V, Accuracy of 25mV Overcharge release voltage VOCR 3.9V~4.2V Accuracy of 50mV Overdischarge detection voltage VODL 2.2V~2.9V, Accuracy of 80mV Overdischarge release voltage VODR 3.0V~3.2V Accuracy of 80mV Over current detection voltage VOI1 Short circuit detection voltage VOI2 VOI1 1.35V
Applications
Protection IC for One-Cell Lithium-Ion / Lithium-Polymer Battery Pack
Delay times are generated by an internal circuit. (External capacitors are unnecessary.) Charger detection voltage -1.35V Reset resistance for Over current protection >500k Wide supply voltage range Small package 1.5 ~ 9.0V SOT-23-6
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
1/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Product Name List
Package Model SOT-23-6 AR BR CR FS312 DR ER FR 4.3500.025 4.2800.025 4.2500.025 4.1500.05 3.9800.05 4.0500.05 2.40.08 2.30.08 2.90.08 3.00.08 3.10.08 3.00.08 15030 12530 15030 Overcharge detection voltage [VOCU] (V) 4.2500.025 4.3500.025 4.2500.025 Overcharge release voltage [VOCR] (V) 4.0500.05 4.1500.05 4.0500.05 Overdischarge Overdischarge detection release voltage voltage [VODL] (V) [VODR] (V) 2.40.08 2.40.08 2.40.08 3.00.08 3.00.08 3.00.08 Overcurrent detection voltage [VOI1] (mV) 20030 20030 15030
Overcharge and 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 NC VDD VSS Description FET gate connection pin for discharge control Input pin for current sense, charger detect FET gate connection pin for charge control No connection Positive power input pin Negative power input pin
1 2 3 6 5 4
SOT-23-6 TOP VIEW
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
2/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Functional Block Diagram
VDD
Short circuit detector Overdischarge Delay Circuit Over current Delay Circuit Over current detector
VSS
Overcharge Delay Circuit
VSS CSI
VSS
Charger detector
VSS CONTROL LOGIC
VSS
OD
Typical Application Circuit
VBAT+
R1 100 VDD
C1 0.1 F
FS312 Series
CSI OD OC
VSS
OC
M1
M2
R2 1k
VBAT-
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
3/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Absolute Maximum Ratings
(VSS=0V, Ta=25C unless otherwise specified) Item Input voltage between VDD and VSS * OC output pin voltage OD output pin voltage CSI input pin voltage Operating Temperature Range Storage Temperature Range Symbol VDD VOC VOD VCSI TOP TST Rating VSS-0.3 to VSS+12 VDD-26 to VDD+0.3 VSS-0.3 to VDD+0.3 VDD-26 to VDD+0.3 -40 to +85 -40 to +125 Unit V V V V C C
Note: FS312 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 (sec) noise exceeding the above input voltage (VSS+12V) may cause damage to the IC.
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
4/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Electrical Characteristics
(VSS=0V, Ta=25C 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 Overdischarge detection delay time Over current detection delay time 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
VDD=3.9V, Ioh=-50A VDD=4.4V, CSI=0V VDD=3.9V, Ioh=-50A VDD=2.2V, Iol=50A VDD=3.6V to 4.4V VDD=VODL+ 0.2V ~ VODL-0.2V VDD=3.0V VDD=3.0V
CONDITIONS
SYMBOL
Min
Typ
Max
UNIT
VDD=3.9V VDD=2.0V
IDD IPD
3.0 0.3
6.0 0.6
A A
VDD-VSS
VDS1
1.5 VOCU -0.025 VOCR -0.050 VODL -0.080 VODR -0.080 VOI1 -0.030 1.0 400 -1.7
9.0 VOCU +0.025 VOCR +0.050 VODL +0.080 VODR +0.080 VOI1 +0.030 1.7 600 -1.0
V
VOCU VOCR VODL VODR VOI1 VDD=3.0V VDD=3.6V VOI2 Rshort VCH
VOCU VOCR VODL VODR VOI1 1.35 500 -1.35
V V V V V V k V
TOC TOD TOI1 TOI2
50 5 2
100 17 5 10
150 30 10 50
ms ms ms s
Voh1 Vol1 Voh2 Vol2
3.4
3.7 0.1 0.5
V V V 0.5 V
3.4
3.7 0.1
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
5/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
State Diagram of Operation
Abnormal charge current condition,
(OC=0)
(S) VDDTOC
(F) Over charge condition, (OC=0)
(H) VCSI>VOI1 & VDDVOCU & t>TOC
(T) VCSI>VCH
(G) VDD(J) Over discharge condition, (OD=0)
(M) VCH(I) VDDTOD (N) VDD>VODR (B) VCSI>VOI1 & t>tOI1
(A) Normal condition
(OD=OC=1)@ VODL(K) VCSI>VOI2
(R) VCSI(L) Power down condition
OD=0 IDD<= IPD(0.3A)
(Q) VDD>VODL
(C) VCSI>VOI2 & t>tOI2
(D) Load impedence >500K
Over current or Short circuit condition,
(OD=0)
(P) Charger is detected @ overdischarge
OD=0 Overdischarge hystersis is released. Trickle charging by automatic charger.
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
6/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Description of Operation
1. Normal Condition
If VODL2.
Overcharge Detection
If the battery voltage detected from VDD reaches VOCU, charging from a charger is inhibited for overcharge protection. When VDD is larger than VOCU over a delay time of TOC, M2 will be turned off.
3.
Release of Overcharge Condition
There are two ways to return to normal condition from overcharge condition.
1) 2)
When the battery is self discharging and VDDFS312 to a load, the discharging current will flow through the parasitic diode of M2. While VOCRVOI1 occurs, M2 will be turned on and back to normal condition.
4.
Overdischarge Detection
When the battery voltage falls below the overdischarge detection voltage (VODL) during discharging condition over a delay time of TOD, M1 will be turned off. In the meanwhile, CSI is pulled up to VDD by way of internal resistance. If VCSI>VOI2, FS312 will enter into power-down mode. (Its current consumption is lower than 0.3A.)
5.
Release of Power-Down mode
A charger is connected while the battery remains in Power-down mode. If VCHFS312 will release power-down mode. When VDD>VODR occurs, M1 will be turned on and back to normal condition.
6.
Charger Detection
While connecting to a charger after entering into power-down mode, then if VCSIVODL and the system will back to normal condition.
7.
Abnormal Charge Current Condition
When a charger is connected to the battery system in normal condition, then if VCSIFortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
7/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
8. Over Current / Short Circuit Condition
When the current is too large during discharging under normal condition as a result of the voltage detected by CSI is greater than VOI1 (or VOI2) through a delay time longer than TOI1 (or TOI2), it satisfies the over current (or short circuit) condition. Then M1 will be turned off and CSI will be pulled down to VSS through an internal resistance. If the over current / short circuit is detected and it keeps longer than the overdischarge detection delay time with the same circumstance, the condition will be changed to power-down mode when the battery voltage falls below the overdischarge detection voltage. If the battery voltage falls below the overdischarge detection voltage (VODL) due to the over current / short circuit, the discharging control FET (M1) will be turned off when it has been detected. After overdischarge detection delay time (TOD) expired, if the battery voltage is still equal to or lower than the overdischarge detection voltage, the condition will then be changed to power-down mode.
9.
Release of Over Current / Short Circuit Condition
While the protection IC remains in Over current / Short circuit condition, then if the load is removed or the impedance between VBAT+ and VBAT- is larger than 500k as well as VCSINote: When a battery is connected to FS312 for the first time, it may not enter the normal condition (dischargeable may not be enabled). In this case, short the CSI and VSS pins or connect to a charger to restore to the normal condition.
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
8/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Timing Diagram
1. Overcharge Condition Self Discharge Normal Condition
Charger Load
VOCU Battery Voltage OC Pin VOCR VODR VODL
VDD
CSI
VDD OD Pin VSS VDD CSI Pin VSS VCH
TOC Self Discharge
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
9/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC 2. Overcharge Condition Load Discharge Normal Condition
Charger Load
VOCU Battery Voltage OC Pin VOCR VODR VODL
VDD
CSI
VDD OD Pin VSS VDD CSI Pin VOI1 VSS VCH
TOC TOC
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
10/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC 3. Overdischarge Condition Charging by a Charger Normal Condition
Charger Load
VOCU Battery Voltage OC Pin VOCR VODR VODL
VDD
CSI
VDD OD Pin VSS CSI Pin VDD VOI2 VSS VCH
TOD TOD
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
11/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC 4. Overdischarge Condition Abnormal Charging Normal Condition
Charger Load
VOCU Battery Voltage OC Pin VOCR VODR VODL
VDD
CSI
VDD OD Pin VSS CSI Pin VDD VOI2 VSS VCH
TOD TOC
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
12/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC 5. Overcurrent / Short circuit Condition Normal Condition
Charger Load
VOCU Battery Voltage OC Pin VOCR VODR VODL
VDD
CSI
VDD OD Pin VSS CSI Pin VDD VOI2 VOI1 VSS
TOI1
TOI2
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
13/14
TD-0404004 Rev. 1.4
FS312
Lithium-ion/Polymer Battery Protection IC
Package Outline
Dimension (Package A)
D DETAIL A b
SYMBOL A A1 A2 b c MIN. 0.90 0.30 0.08
Unit : mm
TYP. 1.15 2.90 BSC. 2.80 BSC. 1.60 BSC. 0.95 BSC. 1.90 BSC. 0.30 0.45 0.60 REF. 0.25 BSC. 0.10 0.10 0 5 4 10 0.25 8 15 0.60 MAX. 1.45 0.15 1.30 0.50 0.22
E1
E
D E E1 e e1
e e1 1
c
L L1 L2 R R1
R1 R
1
A2
A
L2
GAUGE PLANE
A1
L 1 L1
SEATING PLANE
DETAIL A
Dimension (Package B)
D e1 b DETAIL A
SYMBOL A A1 A2 b MIN. 1.05 0.05 1.00 0.40 0.25 0.08 2.70 2.60 1.50 0.35 1.10 2.90 2.80 1.60 0.45 0.60 REF. 0.95 BSC. 0 3 6 1.90 BSC. 5 5 8 10 7 10
Unit : mm
TYP. MAX. 1.35 0.15 1.20 0.55 0.40 0.20 3.00 3.00 1.70 0.55
E1
E
b2 c D E E1 L
e
c b2
L1 e e1
1
1 2
A2
A
GAUGE PLANE
A1
L 2 L1
SEATING PLANE
DETAIL A
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
14/14
TD-0404004 Rev. 1.4

▲Up To Search▲

Price & Availability of FS312

	To Download FS312 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .