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LTC4011 Datasheet(PDF) 1 Page - Linear Technology |
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LTC4011 Datasheet(HTML) 1 Page - Linear Technology |
1 / 26 page LTC4011 4011fb Typical applicaTion FeaTures DescripTion High Efficiency Standalone Nickel Battery Charger applicaTions n CompleteNiMH/NiCdChargerfor1to16Cells n NoMicrocontrollerorFirmwareRequired n 550kHzSynchronousPWMCurrentSourceController n NoAudibleNoisewithCeramicCapacitors n PowerPath™ControlSupport n ProgrammableChargeCurrent:5%Accuracy n WideInputVoltageRange:4.5Vto34V n AutomaticTricklePrecharge n –∆VFastChargeTermination n Optional∆T/∆tFastChargeTermination n AutomaticNiMHTop-OffCharge n ProgrammableTimer n AutomaticRecharge n MultipleStatusOutputs n MicropowerShutdown n 20-LeadThermallyEnhancedTSSOPPackage n IntegratedorStandaloneBatteryCharger n PortableInstrumentsorConsumerProducts n Battery-PoweredDiagnosticsandControl n Back-UpBatteryManagement L ,LT,LTC,LTM,LinearTechnologyandtheLinearlogoareregisteredtrademarksofLinear TechnologyCorporation.PowerPathisatrademarkofLinearTechnologyCorporation.Allother trademarksarethepropertyoftheirrespectiveowners. TheLTC®4011providesacomplete,cost-effectivenickel batteryfastchargesolutioninasmallpackageusingfew external components. A 550kHz PWM current source controllerandallnecessarychargeinitiation,monitoring andterminationcontrolcircuitryareincluded. The LTC4011 automatically senses the presence of a DC adapter and battery insertion or removal. Heavily discharged batteries are precharged with a trickle cur- rent.TheLTC4011cansimultaneouslyuseboth–∆Vand ∆T/∆tfastchargeterminationtechniquesandcandetect variousbatteryfaults.Ifnecessary,atop-offchargeis automaticallyappliedtoNiMHbatteriesafterfastcharg- ingiscompleted.TheICwillalsoresumechargingifthe batteryself-dischargesafterafullchargecycle. AllLTC4011chargingoperationsarequalifiedbyactual chargetimeandmaximumaveragecellvoltage.Charging mayalsobegatedbyminimumandmaximumtemperature limits.NiMHorNiCdfastchargeterminationparameters arepin-selectable. IntegratedPowerPathcontrolsupportensuresthatthe systemremainspoweredatalltimeswithoutallowingload transientstoadverselyaffectchargetermination. 2ANiMHBatteryCharger 2ANiMHChargeCycleat1C 0.1µF 10µF 4.7µH 10µF 0.033µF 0.068µF FAULT INFET CHRG FROM ADAPTER 5V TOC READY |
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