RY4054AT5 独立线性锂离子电池充电器 SOT23-5 深圳恒锐丰科技.pdf

RY4054

StandaloneLinearLi-IonBatteryCharger

Features

•Constant-Current/Constant-VoltageOperation•AutomaticRecharge

withThermalRegulationtoMaximizeCharge•ChargeStatusOutputPin

RateWithoutRiskofOverheating•C/10ChargeTermination

•NoMOSFET,SenseResistororBlockingDiode•ProgrammableChargeCurrentUpto500mA

Required•Preset4.2VChargeVoltagewith±2%Accuracy

•CompleteLinearChargerinSOTPackagefor•25µASupplyCurrentinShutdown

SingleCellLithium-IonBatteries•2.9VTrickleChargeThreshold

•ChargesSingleCellLi-IonBatteriesDirectlyfrom•Soft-StartLimitsInrushCurrent

USBPort•Availablein5-LeadSOT-23Package

•RoHSCompliantandLead(Pb)Free

Applications

•CellularTelephones•BluetoothApplication

•ChargingDocksandCradles•WearableApplication

GeneralDescription

TheRY4054isacompleteconstant-current/constant-voltagelinearchargerforsinglecelllithium-ionbatteries.Its

SOTpackageandlowexternalcomponentcountmaketheRY4054ideallysuitedforportableapplications.

Furthermore,theRY4054isspecificallydesignedtoworkwithinUSBpowerspecifications.

Noexternalsenseresistorisneeded,andnoblockingdiodeisrequiredduetotheinternalMOSFETarchitecture.

Thermalfeedbackregulatesthechargecurrenttolimitthedietemperatureduringhighpoweroperationorhigh

ambient