I2C Control and USB OTG
FEATURES
High Efficiency Charger Capable of 3.5A Charge Currentn Monolithic Switching Regulator Makes Optimal Use of Limited Power and Thermal Budgetn Dual-Input Overvoltage Protection Controllern Priority Multiplexing for Multiple Inputsn I2C/SMBus Control and Status Feedbackn NTC Thermistor ADC for Temperature Dependent Charge Algorithms (JEITA)n Instant-On Operation with Low Batteryn Battery Ideal Diode Controller for Power Managementn USB On-The-Go Power Delivery to the USB Portn Full Featured Li-Ion/Polymer Battery Charger with Four Float Voltage Settingsn 28-Lead 4mm × 5mm QFN PackagenD ESCRIPTION
The LTC®4155 is a 15 watt I2C controlled power manager with PowerPath™ instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4155 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable Lithium-Ion/Polymer battery and a system load.The LTC4155’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications.I2C adjustability of input current, charge current, battery float voltage, charge termination, and many other param-eters allows maximum flexibility. I2C status reporting of key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V power back to the USB port without any additional com-ponents. A dual-input, priority multiplexing, overvoltage protection circuit guards the LTC4155 from high voltage damage on the VBUS pin.The LTC4155 is available in the low profile (0.75mm) 28-lead 4mm × 5mm QFN surface mount package.APPLICATIONS
Tablet PCsn Ultra Mobile PCsn Video Media Playersn Digital Cameras, GPS, PDAsn Smart Phonesn Portable Medical DevicesnL, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.TYPICAL APPLICATION
I2C Controlled High Power Battery Charger/USB Power Manager1μHWALLSNSWALLGTVIN
VBUSLTC4155USBGTUSBSNSIDI2CIRQGNDCLPROG2CLPROG1PROGVC1.21k499ΩSWVOUTCHGSNSBATGATEBATSNSNTCBIASNTCOVGCAP47nF4155 TA01aSwitching Regulator Efficiency1009080EFFICIENCY (%)7060504030201000
0.5
VBAT = 3.9V1.01.52.02.5LOAD CURRENT (A)
3.0
3.5
4155 TA01b
TOSYSTEMLOAD10μF3.6k322μF100k4155fchttp://oneic.com/
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LTC4155TABLE OF CONTENTS
Features ............................................................................................................................1Applications .......................................................................................................................1Typical Application ...............................................................................................................1Description.........................................................................................................................1Absolute Maximum Ratings .....................................................................................................3Order Information .................................................................................................................3Pin Configuration .................................................................................................................3Electrical Characteristics ........................................................................................................4Typical Performance Characteristics ..........................................................................................9Pin Functions .....................................................................................................................12Block Diagram ....................................................................................................................15Timing Diagrams ................................................................................................................16Operation..........................................................................................................................17I2C ........................................................................................................................................................................17Applications Information .......................................................................................................40Typical Applications .............................................................................................................47Package Description ............................................................................................................51Typical Application ..............................................................................................................52Related Parts .....................................................................................................................524155fchttp://oneic.com/
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LTC4155ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)PIN CONFIGURATION
TOP VIEW
VBUSVBUSVOUTSNSVBUS22VOUT21VOUT20CHGSNS
29
GND
19CHGSNS18PROG17BATGATE16BATSNS15NTC
91011121314USBGTOVGCAPNTCBIASWALLGTVCSCLSDA1DVCC2IRQ3ID4
CLPROG15CLPROG26WALLSNS7USBSNS8
SWSWVBUS (Transient) t < 1ms, Duty Cycle < 1% ...–0.3V to 7V......–0.3V to 6VVBUS (Steady State), BATSNS, IRQ, NTC DVCC, SDA, SCL (Note 3) ........................–0.3V to VMAXIWALLSNS, IUSBSNS ...............................................±20mAINTCBIAS, IIRQ..........................................................10mA..............4AISW, IVOUT, ICHGSNS (Both Pins in Each Case) Operating Junction Temperature Range ...–40°C to 125°CStorage Temperature Range ..................–65°C to 150°C282726252423
UFD PACKAGE
28-LEAD (4mm w 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 43°C/WEXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCBORDER INFORMATION
LEAD FREE FINISHLTC4155EUFD#PBFLTC4155IUFD#PBFTAPE AND REELLTC4155EUFD#TRPBFLTC4155IUFD#TRPBFPART MARKING*41554155PACKAGE DESCRIPTION28-Lead (4mm × 5mm × 0.75mm) Plastic QFN28-Lead (4mm × 5mm × 0.75mm) Plastic QFNTEMPERATURE RANGE–40°C to 125°C–40°C to 125°CConsult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for information on non-standard lead based finish parts.For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/4155fchttp://oneic.com/
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LTC4155E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA ≈ TJ = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.SYMBOLVBUSVBUSREGIVBUSQPARAMETERInput Supply VoltageUndervoltage Current ReductionInput Quiescent CurrentInput Undervoltage Current Limit EnabledUSB Suspend Mode100mA IVBUS Mode, IVOUT = 0μA, Charger Off500mA – 3A IVBUS Modes, IVOUT = 0μA, Charger OffVBUS > VUVLO, Battery Charger Off, IVOUT = 0μAVBUS = 0V, IVOUT = 0μAStorage and Shipment Mode, DVCC = 0V100mA IVBUS Mode (USB Lo Power) (Default)500mA IVBUS Mode (USB Hi Power)600mA IVBUS Mode 700mA IVBUS Mode800mA IVBUS Mode900mA IVBUS Mode (USB 3.0)1.00A IVBUS Mode1.25A IVBUS Mode1.50A IVBUS Mode1.75A IVBUS Mode2.00A IVBUS Mode2.25A IVBUS Mode2.50A IVBUS Mode2.75A IVBUS Mode3.00A IVBUS Mode (Default)2.5mA IVBUS Mode (USB Suspend)llCONDITIONSlMIN4.35TYPMAX5.5UNITSVVmAmAmASwitching Battery Charger4.300.0600.560177.02.00.665460550650745800950115014251650190020502350255028004.024.074.124.1729043059073088010251180133014851635178019152065221023503.44804805706707708501000123015001750200021752475272529501.84.054.104.154.2031546562077092510751230138515351685183519802130228024303.574.35BATSNS4.353.403.503.01.251005006007008009001025130015751875212523002600290031002.54.084.134.184.23340500650810970112512801440158517351020452195235025003.704.54.5IBATQBattery Drain CurrentμAμAμAmAmAmAmAmAmAmAmAmAmAmAmAmAmAmAmAVVVVmAmAmAmAmAmAmAmAmAmAmAmAmAmAmAAVVVVIVBUSLIMTotal Input Current When Load Exceeds Power LimitlVFLOATBATSNS Regulated Output Voltage 4.05V Setting (Default)Selected by I2C Control. 4.10V SettingSwitching Modes4.15V Setting4.20V SettingRegulated Battery Charge Current Selected by I2C Control12.50% Charge Current Mode18.75% Charge Current Mode25.00% Charge Current Mode31.25% Charge Current Mode37.50% Charge Current Mode43.75% Charge Current Mode50.00% Charge Current Mode56.25% Charge Current Mode62.50% Charge Current Mode68.75% Charge Current Mode75.00% Charge Current Mode81.25% Charge Current Mode87.50% Charge Current Mode93.75% Charge Current Mode100.0% Charge Current Mode (Default)100.0% Charge Current Mode, RPROG = 340ΩSuspend Mode, IVOUT = 1mABattery Charger Enabled, Charging, BATSNS ≥ 3.5V Battery Charger Terminated or Battery Charger DisabledBattery Charger Enabled, Charging, BATSNS ≤ 3.3VllllICHARGEICHARGE(MAX)VOUTRegulated Battery Charge CurrentPowerPath Regulated Output Voltage (VBUS Power Available)VOUT(MIN)Low Battery Instant-On Output Voltage (VBUS Power Available)4155fchttp://oneic.com/
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LTC4155ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA ≈ TJ = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.PARAMETERVOUT Current Available Before Loading BatteryCONDITIONS2.5mA IVBUS Mode (USB Suspend)100mA IVBUS Mode, BAT = 3.3V500mA IVBUS Mode, BAT = 3.3V600mA IVBUS Mode, BAT = 3.3V700mA IVBUS Mode, BAT = 3.3V800mA IVBUS Mode, BAT = 3.3V900mA IVBUS Mode, BAT = 3.3V1.00A IVBUS Mode, BAT = 3.3V1.25A IVBUS Mode, BAT = 3.3V1.50A IVBUS Mode, BAT = 3.3V1.75A IVBUS Mode, BAT = 3.3V2.00A IVBUS Mode, BAT = 3.3V2.25A IVBUS Mode, BAT = 3.3V2.50A IVBUS Mode, BAT = 3.3V2.75A IVBUS Mode, BAT = 3.3V3.00A IVBUS Mode, BAT = 3.3V12.50% Charge Current Mode18.75% Charge Current Mode25.00% Charge Current Mode31.25% Charge Current Mode37.50% Charge Current Mode43.75% Charge Current Mode50.00% Charge Current Mode56.25% Charge Current Mode62.50% Charge Current Mode68.75% Charge Current Mode75.00% Charge Current Mode81.25% Charge Current Mode87.50% Charge Current Mode93.75% Charge Current Mode100.0% Charge Current Mode (Default)Threshold Voltage Relative to VFLOAT1-Hour Mode2-Hour Mode4-Hour Mode (Default)8-Hour ModeRising ThresholdHysteresisBATSNS < (VLOWBAT – ΔVLOWBAT)C/10 Mode (ICHARGE = 10%FS) (Default)C/5 Mode (ICHARGE = 20%FS)C/20 Mode (ICHARGE = 5%FS)C/50 Mode (ICHARGE = 2%FS)96.60.951.903.817.632.650.471102301550MIN1TYP1.3766738109441093120013971728207224112700284631543408365715022530037545052560067575082590097510501125120097.61.062.124.248.482.81300.531202402460100099098.41.172.334.669.322.950.591302503370MAXSYMBOLIVOUTUNITSmAmAmAmAmAmAmA mAmAmAmAmAmAmAmAmAmVmVmVmVmVmVmVmVmVmV mVmVmVmV mV%HoursHoursHoursHoursVmVHoursmVmVmVmVmA/mAmA/mA VPROGPROG Pin Servo VoltageVRECHRGtTERMINATERecharge Battery Threshold VoltageSafety Timer Termination Period Selected by I2C Control. Timer Starts When BATSNS ≥ VFLOATThreshold VoltageBad Battery Termination TimeFull Capacity Charge Indication PROG Voltage Selected by I2C ControlRatio of ICHGSNS to PROG Pin CurrentVLOWBATtBADBATVC/xhPROGhCLPROG1(Note 4)Ratio of Measured VBUS Current to CLPROG1 IVBUS ModeCLPROG1 Sense Current4155fchttp://oneic.com/
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LTC4155ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA ≈ TJ = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.PARAMETERCONDITIONSMINTYP1979466557657758839990122214941746199921752477273029561.21031.22.052.250.0900.0800.040500mA – 3A IVBUS Modes0mA ≤ IVBUS ≤ 500mA4.752.91.4IVBUS = 0mAVBATSNS FallingHysteresisVBUS < 4V2.651.961.22.81307.22.956.75.252.50MAXRatio of Measured VBUS Current to 2.5mA IVBUS Mode (USB Suspend)CLPROG2 Sense Current100mA IVBUS Mode500mA IVBUS Mode600mA IVBUS Mode700mA IVBUS Mode800mA IVBUS Mode900mA IVBUS Mode1.00A IVBUS Mode1.25A IVBUS Mode1.50A IVBUS Mode1.75A IVBUS Mode2.00A IVBUS Mode2.25A IVBUS Mode2.50A IVBUS Mode2.75A IVBUS Mode3.00A IVBUS ModeCLPROG1 Servo Voltage in Current LimitCLPROG2 Servo Voltage in Current LimitSwitching FrequencyHigh Side Switch On ResistanceLow Side Switch On ResistanceBattery Charger Current Sense ResistancePeak Inductor Current ClampOutput VoltageInput VoltageOutput Current LimitVOUT Quiescent CurrentOutput Current Limit Servo VoltageVBATSNS Undervoltage LockoutShort-Circuit Fault DelayCLPROG1 IVBUS Mode2.5mA IVBUS Mode (USB Suspend) 100mA – 3A IVBUS ModesSYMBOLhCLPROG2(Note 4)UNITSmA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mA mA/mAVmVVMHzΩΩΩAVVAmAVVmVmsVCLPROG1VCLPROG2fOSCRPMOSRNMOSRCHGIPEAKVBUSVOUTIVBUSOTGIVOUTOTGQVCLPROG2VBATSNSUVLOtSCFAULTStep-Up Mode PowerPath Switching Regulator (USB On-The-Go)Overvoltage Protection, Priority Multiplexer and Undervoltage Lockout; USB Input Connected to USBSNS Through 3.6k Resistor; WALL Input Connected to WALLSNS Through 3.6k ResistorVUVLOUSB Input, Wall Input Undervoltage LockoutUSB Input, Wall Input to BATSNS Differential Undervoltage LockoutRising Threshold Falling ThresholdHysteresisRising Threshold Falling ThresholdHysteresis4.053.9010010050705.756.02 • VUSBSNS2 • VWALLSNS06.34253754.454.25VVmVmVmVmVVVVV4155fcVDUVLOVOVLOVUSBGTACTVVWALLGTACTVVUSBGTPROTUSB Input, Wall Input Overvoltage Rising Threshold Protection ThresholdUSBGT Output Voltage ActiveWALLGT Output Voltage ActiveUSBGT Output Voltage ProtectedUSBSNS < VUSBOVLOWALLSNS < VWALLOVLOUSBSNS > VUSBOVLOht
6
t
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LTC4155ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA ≈ TJ = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.PARAMETERCONDITIONSWALLSNS > VWALLOVLO5V Through 3.6k into WALLSNS, USBSNS,IUSBGT, IWALLGT = 1μAVUSBSNS = 5V, VUSBSNS > VWALLSNSVUSBSNS = 5V, VWALLSNS > VUSBSNSVWALLSNS = 5V, VWALLSNS > VUSBSNSVWALLSNS = 5V, VUSBSNS > VWALLSNS8.4MINTYP08.9275427541.2175350.5550.860.21253.850.1130.56.091Warning ThresholdReset ThresholdWarning ThresholdReset ThresholdFault ThresholdReset Threshold1029841451923–100Input Power Available, Battery Charger Off(Note 3)SCL/SDA = 0kHz1.70.251.00001_001[R/W]b7030SDA, SCL = DVCC–11% DVCC% DVCCμA15VMAX6.16210298414519236.1911029841451923100100850.95MAXSYMBOLUNITSVVμAμAμAμAmsμAmVμAVVmAVV/VV/VmV/V/LSBCountCountCountCountCountCountnAmVVμAVVWALLGTPROTWALLGT Output Voltage ProtectedVUSBGTLOAD, USBGT, WALLGT Voltage Under VWALLGTLOADLoadIUSBSNSQIWALLSNSQtRISEIIRQVIRQIIDVID_OTGUSBSNS Quiescent CurrentWALLSNS Quiescent CurrentOVGCAP Time to Reach RegulationCOVGCAP = 1nFIRQ Pin Leakage CurrentIRQ Pin Output Low VoltageID Pin Pull-Up CurrentID Pin Threshold VoltageVIRQ = 5VIIRQ = 5mAVID = 0VID Pin FallingHysteresisOnly When Enabled via I2C ControlOnly When Enabled via I2C ControlVNTC/VNTCBIAS Ratio Below Which Only 0x00 Is Returned VNTC/VNTCBIAS Ratio Above Which Only 0x7F Is ReturnedIRQ Pin CharacteristicsID Pin CharacteristicsOvertemperature Battery ConditionerIBATOVERTEMPOvertemp Battery Discharge CurrentVBATOVERTEMPOvertemp Battery Voltage TargetThermistor Measurement SystemκOFFSETκHIGHκSPANdTOO_COLDdTOO_WARMVNTC/VNTCBIAS A/D Lower Range EndVNTC/VNTCBIAS A/D Upper Range EndA/D Span Coefficient (Decimal Format)NTCVAL at NTC_TOO_COLD (Decimal Format)NTCVAL at NTC_TOO_WARM (Decimal Format)dHOT_FAULT NTCVAL at HOT_FAULT (Decimal Format)INTCIdeal DiodeVFWDI2C PortDVCCIDVCCQVDVCC_UVLOADDRESSVIH,SDA,SCLVIL,SDA,SCLIIH,SDA,SCLI2C Logic Reference LevelDVCC CurrentDVCC UVLOI2C AddressInput High ThresholdInput Low ThresholdInput Leakage HighForward Voltage DetectionNTC Leakage Current4155fchttp://oneic.com/
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LTC4155ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA ≈ TJ = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.PARAMETERInput Leakage LowDigital Output Low (SDA)Clock Operating FrequencyBus Free Time Between STOP and START ConditionHold Time After (Repeated) START ConditionRepeated START Condition Set-Up TimeSTOP Condition TimeData Hold TimeInput Data Hold TimeData Set-Up TimeClock LOW PeriodClock HIGH PeriodClock Data Fall TimeClock Data Rise TimeSpike Suppression Time1.30.60.60.6001001.30.6202030030050900CONDITIONSSDA, SCL = 0VISDA = 3mAMIN–1TYPMAX10.4400SYMBOLIIL,SDA,SCLVOLfSCLtBUFtHD_SDAtSU_SDAtSU_STOtHD_DAT(OUT)tHD_DAT(IN)tSU_DATtLOWtHIGHtftrtSPUNITSμAVkHzμsμsμsμsnsnsnsμsμsnsnsnsNote 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.Note 2: The LTC4155E is tested under pulsed load conditions such that TJ ≈ TA. The LTC4155E is guaranteed to meet performance specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC4155I is guaranteed over the full –40°C to 125°C operating junction temperature range. The junction temperature (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and power dissipation (PD, in watts) according to the formula: TJ = TA + (PD • θJA), where the package thermal impedance θJA = 43°C/W)Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors.Note 3. VMAX is the maximum of VBUS or BATSNSNote 4. Total input current is IVBUSQ + VCLPROG/RCLPROG • (hCLPROG + 1).4155fchttp://oneic.com/
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LTC4155 TA = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.Battery and VBUS Currents vs VOUT Current0.6
INPUT CURRENT0.4CURRENT (A)CURRENT (A)CHARGE CURRENT32
ICHG10–1
500mA INPUT CURRENT LIMIT MODE0
0.2
0.60.4
VOUT CURRENT (A)
0.8
1.0
4155 G01
TYPICAL PERFORMANCE CHARACTERISTICS
Battery and VBUS Currents vs VOUT Current4
3A INPUT CURRENT LIMIT MODEIBUSBattery Drain Current vs Temperature10987CURRENT (μA)654321
SUSPEND MODE (μA)VBUS = 0V0.2
0
–0.2
–0.4–2
01
23VOUT CURRENT (A)
45
4155 G02
SHIP AND STORE MODE (μA)0
–40–25–105203550658095110125
TEMPERATURE (°C)
4155 G03
Switching Regulator Efficiency95.092.590.0EFFICIENCY (%)87.585.082.580.077.575.0
0
0.5
1.0
POWER LOST TO VOUTPOWER LOST TO BATTERYEFFICIENCYTO BATTERYEFFICIENCYTO VOUT4.03.53.0
POWER LOST (W)2.52.01.51.00.5
EFFICIENCY (%)1009590858075706560
Battery Charger Total Effi ciency vs Battery Voltage
IVOUT = 0AM = PBAT/PBUSVFLOAT = 4.2V100% CHARGECURRENT MODE1.75
12.5% CHARGECURRENT MODELOAD CURRENT (A)USB Compliant Load Current Available Before Discharging Battery
VFLOAT = 4.05V1.50
900mA MODE1.25
1.00
500mA MODE0.750.50
0
1.52.02.53.03.5CURRENT (A)4155 G04
INCLUDES LOSSES FROM 2w Si7938DP OVP FETS
XFL4020-102ME INDUCTOR AND Si5481DU CHARGER FET
3.03.34.23.63.9
4155 G05BATTERY VOLTAGE (V)
INCLUDES LOSSES FROM 2w Si7938DP OVP FETS
XFL4020-102ME INDUCTOR AND Si5481DU CHARGER FET
2.4
2.7
55
2.42.7
3.03.33.6BATTERY VOLTAGE (V)
3.94.2
4155 G06
500mA USB Limited Battery
Charge Current vs Battery Voltage
0.70.6CHARGE CURRENT (A)0.50.40.30.20.102.4
100% CHARGECURRENT MODE12.5% CHARGECURRENT MODE100
100mA USB Limited Battery
Charge Current vs Battery Voltage
VFLOAT = 4.2V4.44.34.2VOUT VOLTAGE (V)4.14.03.93.83.73.63.5
VOUT Voltage vs Battery Voltage
IVOUT = 0A, VFLOAT = 4.2V100% CHARGE CURRENT MODE50% CHARGE CURRENT MODE12.5% CHARGE CURRENT MODECHARGER DISABLEDCHARGE CURRENT (mA)80
60
40
200
2.7
3.63.33.0
BATTERY VOLTAGE (V)
3.94.2
4155 G07
2.42.7
3.03.33.6BATTERY VOLTAGE (V)
3.94.2
4155 G08
3.4
2.42.7
3.03.33.6BATTERY VOLTAGE (V)
3.94.2
4155 G09
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LTC4155 TYPICAL PERFORMANCE CHARACTERISTICS
Battery Charger Resistance
vs Temperature
60CHARGER TOTAL RESISTANCE (mΩ)NORMALIZED FLOAT VOLTAGE (V)1.000
OSCILLATOR FREQUENCY (MHz)500mA MODETA = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.Normalized Float Voltage vs Temperature
2.292.272.252.232.212.19
2.17
–40–25–105203550658095110125
TEMPERATURE (°C)
4155 G12
Oscillator Frequency vs Temperature
550.999
50
0.998
100mA MODE45
0.997
40
RESISTANCE INCLUDES VISHAYSILICONIX Si5481DU EXTERNAL PMOS–15
3510
TEMPERATURE (°C)
60
85
4613 G10
0.996
35–40
0.995
–40–25–105203550658095110125
TEMPERATURE (°C)
4155 G11
Automatic Charge Current Reduction vs Battery Voltage
120NORMALIZED CHARGE CURRENT (%)100
VBUS CURRENT (mA)806040200
3.02.52.01.5
VBUS Current vs VBUS Voltage in USB Suspend Mode
4.44.34.2VOUT VOLTAGE (V)4.14.03.93.8
0.50
3.7
2.5
3.0
3.54.04.5VBUS VOLTAGE (V)
5.0
5.5
4155 G14
VOUT Voltage vs VOUT Current in USB Suspend Mode
100% CHARGECURRENT MODE12.5% CHARGECURRENT MODEMAX1.0
NOT MAX2.4
2.73.03.3BATTERY VOLTAGE (V)
3.6
4155 G13
3.6
00.5
2.01.5
VOUT CURRENT (mA)
1.02.5
4155 G15
VBUS Current vs VOUT Current in USB Suspend Mode
2.5
0.80.7 DVCC CURRENT (μA)VBUS CURRENT (mA)2.0
0.60.50.40.30.20.1
0.5
0
0.5
1.52.01.0
VOUT CURRENT (mA)
2.5
4155 G16
Static DVCC Current vs DVCC Voltage
6.126.116.106.096.08
Rising Overvoltage Lockout Threshold vs Temperature
1.5
1.0
VBUS VOLTAGE (V)0
1
3
DVCC VOLTAGE (V)
2
4
5
4155 G17
0
6.07
–40–25–105203550658095110125
TEMPERATURE (°C)
4155 G18
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分销商库存信息:
LINEAR-TECHNOLOGYLTC4155EUFD#TRPBFLTC4155EUFD#PBF
LTC4155IUFD#PBF
LTC4155IUFD#TRPBF
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