Electronic Components Datasheet Search |
|
LTC4011 Datasheet(PDF) 9 Page - Linear Technology |
|
LTC4011 Datasheet(HTML) 9 Page - Linear Technology |
9 / 26 page LTC4011 4011fb pin FuncTions VCDIV(Pin9):AverageCellVoltageResistorDividerTermi- nation.TheLTC4011connectsthispintoGNDprovidedthe chargerisnotinshutdown.VCDIVisanopen-drainoutput toGNDwithanoperatingvoltagerangeofGNDtoBAT. TIMER(Pin10):ChargeTimerInput.Aresistorconnected betweenTIMERandGNDprogramschargecycletiming limits.RefertotheApplicationsInformationsectionfor completedetails.OperatingvoltagerangeisGNDto1V. SENSE(Pin11):ChargeCurrentSenseInput.Anexternal resistorbetweenthisinputandBATisusedtoprogram charge current. Refer to the Applications Information section for complete details on programming charge current.Operatingvoltagerangesfrom(BAT–50mV)to (BAT+200mV). BAT(Pin12):BatteryPackConnection.TheLTC4011uses thevoltageonthispintocontrolcurrentsourcedfrom VCCtothebatteryduringcharging.Allowableoperating voltagerangeisGNDtoVCC. TOC(Pin13):Active-LowTop-OffChargeIndicatorOut- put.TheLTC4011indicatesthetop-offchargestatefor NiMHbatteriesbyconnectingthispintoGND.Referto theOperationandApplicationsInformationsectionsfor furtherdetails.ThisoutputiscapableofdrivinganLED andshouldbeleftfloatingifnotused.TOCisanopen- drainoutputtoGNDwithanoperatingvoltagerangeof GNDtoVCC. INTVDD(Pin14):Internal5VRegulatorOutput.Thispin providesameansofbypassingtheinternal5Vregulator usedtopowertheBGATEoutputdriver.Typically,power should not be drawn from this pin by the application circuit.RefertotheApplicationInformationsectionfor additionaldetails. BGATE(Pin15):ExternalSynchronousN-channelMOSFET GateControlOutput.Thisoutputprovidesgatedriveto anoptionalexternalNMOSpowertransistorswitchused forsynchronousrectificationtoincreaseefficiencyinthe step-downDC/DCconverter.OperatingvoltageisGNDto INTVDD.BGATEshouldbeleftfloatingifnotused. PGND(Pin16):PowerGround.Thispinprovidesareturn forswitchingcurrentsgeneratedbyinternalLTC4011cir- cuits.Externally,PGNDandGNDshouldbewiredtogether usingaverylowimpedanceconnection.RefertoPCB Layout Considerations in the Applications Information sectionforadditionalgroundingdetails. TGATE(Pin17):ExternalP-channelMOSFETGateControl Output.ThisoutputprovidesgatedrivetoanexternalPMOS powertransistorswitchusedintheDC/DCconverter.Op- eratingvoltagerangevariesasafunctionofVCC.Referto theElectricalCharacteristicstableforspecificvoltages. VCC(Pin18):PowerInput.ExternalPowerPathcontrol circuitsnormallyconnecteithertheDCinputpowersup- plyorthebatterytothispin.RefertotheApplications Informationsectionforfurtherdetails.Suggestedapplied voltagerangeisGNDto34V. READY (Pin 19): Active-Low Ready-to-Charge Output. TheLTC4011connectsthispintoGNDifproperoperating voltagesforchargingarepresent.RefertotheOperation sectionforcompletedetailsonchargequalification.This outputiscapableofdrivinganLEDandshouldbeleft floatingifnotused.READYisanopen-drainoutputto GNDwithanoperatingvoltagerangeofGNDtoVCC. INFET(Pin20):PowerPathControlOutput.Forverylow dropoutapplications,thisoutputmaybeusedtodrive the gate of an input PMOS pass transistor connected betweentheDCinput(DCIN)andtherawsystemsupply rail(VCC).INFETisinternallyclampedabout6VbelowVCC. MaximumoperatingvoltageisVCC.INFETshouldbeleft floatingifnotused. Exposed Pad (Pin 21): This pin provides enhanced thermalpropertiesfortheTSSOP.Itmustbesoldered tothePCBcoppergroundtoobtainoptimumthermal performance. |
Similar Part No. - LTC4011_1 |
|
Similar Description - LTC4011_1 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |