FS312 Series Datasheet FS312 Series DatasheetV Lithium Batte
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FS312 Series Datasheet
FS312 Series DatasheetV
Lithium Battery Protection
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TD0211-1801 Ver. 1.3N
Description
FS312 Series Datasheet
FS312 series lithium lithium polymer rechargeable battery protection with high accurate voltage detection delay circuits. These suitable protection single cell lithium lithium polymer battery packs from over charge, over discharge, over current.
1-Cell Protection
Package Model SOT-23-6 FS312 4.350±0.025 4.280±0.025 4.250±0.025 4.150±0.05 3.980±0.05 4.050±0.05 2.4±0.08 2.3±0.08 2.9±0.08 3.0±0.08 3.1±0.08 3.0±0.08 150±30 125±30 150±30 Overcharge detection voltage [VOCU] 4.250±0.025 4.350±0.025 4.250±0.025 Overcharge release voltage [VOCR] 4.050±0.05 4.150±0.05 4.050±0.05 Overdischarge detection voltage [VODL] 2.4±0.08 2.4±0.08 2.4±0.08 Overdischarge release voltage [VODR] 3.0±0.08 3.0±0.08 3.0±0.08 Overcurrent detection voltage [VOI1] (mV) 200±30 200±30 150±30
Overcharge overdischarge voltages overcurrent detection voltage changed customer's request.
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TD0211-1801 Ver. 1.3N
Features
FS312 Series Datasheet
supply current Overcharge detection voltageVOCU Overcharge release voltageVOCR
Operation: 3.0uA typ. @VDD=3.9V Power-down mode: 0.3uA typ. @VDD=2.0V 4.0V~4.4V, Accuracy ±25mV VOCR, Accuracy ±50mV 2.3V~2.5V, Accuracy ±80mV VODR, Accuracy ±80mV VOI1 1.35V
Overdischarge detection voltageVODL Overdischarge release voltageVODR Over current detection voltageVOI1 Short circuit detection voltageVOI2
Delay times generated internal circuit. (External capacitors unnecessary.) Charger detection voltage -1.35V >500K 9.0V SOT-23-6
Reset resistance Over current protection Wide supply voltage range Small package
Applications
Protection One-Cell Lithium-Ion Lithium-Polymer Battery Pack
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TD0211-1801 Ver. 1.3N
Block Diagram
FS312 Series Datasheet
Short circuit detector Overdischarge Delay Circuit Over current Delay Circuit Over current detector
Overcharge Delay Circuit
Charger detector
CONTROL LOGIC
Configuration
Symbol Description gate connection discharge control Input current sense, charger detect gate connection charge control Connecting Positive power input Negative power input
SOT-23-6 VIEW
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
Typical Application Circuit
VBAT+
BATTERY 0.1uF
FS312 Series
VBAT-
Absolute Maximum Ratings
(VSS=0V, Ta=25 unless otherwise specified)
Item Input voltage between output voltage output voltage input voltage Operating Temperature Range Storage Temperature Range Symbol VCSI Rating VSS-0.3 VSS+12 VDD-26 VDD+0.3 VSS-0.3 VDD+0.3 VDD-26 VDD+0.3 +125 Unit
Note: This contains circuit that protects from static discharge, take special care that excessive static electricity voltage which exceeds limit protection circuit applied Pulse (sec) noise exceeding above input voltage (VSS+12V) cause damage
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TD0211-1801 Ver. 1.3N
Electrical Characteristic
FS312 Series Datasheet
(VSS=0V, Ta=25 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 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 output voltage output voltage output voltage output voltage
VDD=3.9V, Ioh=-50uA VDD=4.4V, CSI=0V VDD=3.9V, Ioh=-50uA VDD=2.2V, Iol=50uA VDD=3.6V 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
VDD-VSS
VDS1
VOCU VOCR VODL VODR VOI1 VDD=3.0V VDD=3.6V VOI2 Rshort
VOCU -0.025 VOCR -0.050 VODL -0.080 VODR -0.080 VOI1 -0.030 -1.7
VOCU VOCR VODL VODR VOI1 1.35 -1.35
VOCU +0.025 VOCR +0.050 VODL +0.080 VODR +0.080 VOI1 +0.030 -1.0
TOI1 TOI2
Voh1 Vol1 Voh2 Vol2
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
State Diagram Operation
Abnormal charge current condition,
(OC=0)
VDD<VOCU VCSI<VCH t>TOC
Over charge condition, (OC=0)
VCSI>VOI1 VDD<VOCU VDD>VOCU t>TOC
VCSI>VCH
VDD<VOCR
Over discharge condition, (OD=0)
VCH<VCSI<VOI2
VDD<VODL t>TOD VDD>VODR VCSI>VOI1 t>tOI1
Normal condition
(OD=OC=1)@ VODL<VDD<VOCU VCH<VCSI<VOI1
VCSI>VOI2
VCSI<VCH
Power down condition
OD=0 IDD<= IPD(0.3uA)
VDD>VODL
VCSI>VOI2 t>tOI2
Load impedence >500K
Over current Short circuit condition,
(OD=0)
Charger detected overdischarge
OD=0 Overdischarge hystersis released. Trickle charging automatic charger.
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TD0211-1801 Ver. 1.3N
Description Operation
11.1 Normal Condition
FS312 Series Datasheet
VODL<VDD<VOCU VCH<VCSI<VOI1, both turned charging discharging processes operated normally.
11.2 Overcharge Detection
battery voltage detected from reaches certain value, charging from charger inhibited overcharge protection. When larger than VOCU over delay time TOC, turned off.
11.3 Release Overcharge Condition
There ways return normal condition from overcharge condition.
battery self discharging VDD<VOCR occurs, turned back normal condition. Remove charger connected load. VOCR<VDD<VOCU VCSI>VOI1 occurs, turned back normal condition.
11.4 Overdischarge Detection
battery voltage detected from lower certain value, discharge load stops. smaller than VODL over delay time TOD, turned off. meanwhile, pulled internal resistance, RCSID. VCSI>VOI2, protection enters into Power-down mode. (Its current consumption lower than 0.3uA).
11.5 Release Power-down mode
charger connected while battery remains Power-down mode. VCH<VCSI<VOI2 VDD<VODR occur, still releases Power-down mode. VDD>VODR occurs, turned back normal condition.
11.6 Charger Detection
charger connected battery remained Power-down mode, voltages will become VCSI<VCH VDD>VODL. turned back normal condition.
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
11.7 Abnormal Charging Condition
charger connected battery normal condition, VCSI<VCH occurs delay time longer than TOC, turned off.
11.8 Over current Short circuit Detection
When discharging current large during discharging under normal condition voltage detected from larger than VOIX (VOI1 VOI2) over certain delay time TOIX (TOI1 TOI2), means over current/short circuit condition occurred. turned off. pulled internal resistance, RCSIS. over current short circuit detected continues longer than overdischarge detection delay time without releasing load, condition changes power-down condition when battery voltage falls below overdischarge detection voltage. battery voltage falls below overdischarge detection voltage over current short circuit, discharging control turns when over current short circuit detected. battery voltage restores late battery voltage after overdischarge detection delay time equal lower than overdischarge detection voltage, condition changes power-down condition.
11.9 Release Over current Short circuit Condition
While protection remains Over current/Short circuit condition load removed impedance between VBAT+ VBAT- larger than 500K VCSI<VOI1, turned back normal condition.
Note When battery connected first time, enter normal condition (not dischargeable condition). this occurs, voltage equal voltage (short pins connect charger) enter normal condition.
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TD0211-1801 Ver. 1.3N
Timing Diagram
FS312 Series Datasheet
12.1 Overcharge Condition
Charger Load
Self Discharging
Normal Condition
VOCU Battery Voltage VOCR VODR VODL
Self Discharge
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
Load Discharging Normal Condition
12.2 Overcharge Condition
Charger Load
VOCU Battery Voltage VOCR VODR VODL
VOI1
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
Charging Charger Normal Condition
12.3 Overdischarge Condition
Charger Load
VOCU Battery Voltage VOCR VODR VODL
VOI2
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
Abnormal Charging Normal Condition
12.4 Overdischarge Condition
Charger Load
VOCU Battery Voltage VOCR VODR VODL
VOI2
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
Normal Condition
12.5 Over current Short circuit Condition
Charger Load
VOCU Battery Voltage VOCR VODR VODL
VOI2 VOI1
TOI1
TOI2
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TD0211-1801 Ver. 1.3N
SOT-23-6
FS312 Series Datasheet
13.1 Dimensions (Package
DETAIL
SYMBOL MIN. 0.90 0.30 0.08
Unit
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 0.25 0.60 MAX. 1.45 0.15 1.30 0.50 0.22
GAUGE PLANE
SEATING PLANE
DETAIL
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TD0211-1801 Ver. 1.3N
FS312 Series Datasheet
13.2 Dimensions (Package
DETAIL
SYMBOL 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. 1.90 BSC.
Unit
TYP. MAX. 1.35 0.15 1.20 0.55 0.40 0.20 3.00 3.00 1.70 0.55
GAUGE PLANE
SEATING PLANE
DETAIL
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TD0211-1801 Ver. 1.3N
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