类型 | 其他IC | 品牌 | 首鼎 | 型号 | SD8017 |
封装 | SOT23-6 | 批号 | 2016+ | |
DescriptionSD8017 is a complete constant-current &constant voltage linear charger for single celllithium-ion and Lithium-Polymer batteries. ItsSOT-23 package and low external component countmake SD8017 ideally suited for portableapplications. Furthermore, the SD8017 isspecifically designed to work within USB powerspecification.At the same time, SD8017 can alsobe used in the standalone lithium-ion andLithium-polymer battery chargers. No external sense resistor is needed, and no blocking diode is required due to the internalMOSFET architecture. Thermal feedbackregulates the charge current to limit the dietemperature during high power operation or highambient temperature.The charge voltage is fixedat 4.2V, and the charge current can be programmedexternally with a single resistor. The SE9017automatically terminates the charge cycle when thecharge current drops to 1/10ththe programmed value after the final float voltage is reached.When the input supply (wall adapter or USBsupply) is removed, the SD8017 automaticallyenters a low current stage, dropping the batterydrain current to less than 2uA. The SD8017 canbe put into shutdown mode, reducing the supplycurrent to 20uA.Other features include charge current monitor,undervoltage lockout, automatic recharge and astatus pin to indicate charge termination and thepresence of an input voltage. SE9017 isintentionally designed to have slightly negativeTempco. This provides extra protection to Lithiumbattery during charging.Features¾Programmable Charge Current Up to 800mA.¾No MOSFET, Sense Resistor or Blocking DiodeRequired.¾Constant-Current/Constant-VoltageOperationwith Thermal Protection to Maximize ChargeRate without Risk of Overheating.¾Charges Single Cell Li-Ion Batteries Directlyfrom USB Port.¾Preset 4.2V Charge Voltage with±1% Accuracy.¾20uA Supply Current in Shutdown.¾2.9V Trickle Charge Threshold¾Soft-Start Limits Inrush Current.¾Available in 6-Lead SOT-23 and PSOP-8(Exposed Pad) Packages.¾RoHS Compliant and 100% L Absolute Maximum Rating(1)Parameter SymbolValueUnitsInput Supply VoltageVCC7VPROG VoltageVPROGVCC+0.3 VBAT VoltageVBAT7 VCHRG VoltageVCHRG7 VBAT Short-Circuit DurationContinuous250 (SOT-23-6)Thermal Resistance, Junction-to-AmbientΘJA75(PSOP8)°C/WBAT Pin CurrentIBAT800mAPROG Pin CurrentIPROG800μAMaximum Junction TemperatureTJ125°CStorage TemperatureTS-65 to +125°CLead Temperature (Soldering, 10 sec)300°COperating Rating(2)Parameter SymbolValueUnitsSupply Input VoltageVIN-0.3 to +7VJunction TemperatureTJ-40 to +85°CElectrical CharacteristicsV IN= 5V; TJ= 25°C; unless otherwise specified.Symbol ParameterConditionsMinTypMaxUnitVCCInput Supply Voltage4.256VCharge Mode(3), RPROG= 10k110500µAStandby Mode (Charge Terminated)70µAICCInput Supply CurrentShutdown Mode(RPROGNot Connected,VCC< VBAT, or VCC< VUV)2040µAVFLOATRegulated Output (Float) VoltageIBAT= 30mA,ICHRG= 5mA4.1584.24.242VRPROG= 10k, Current Mode90106130mARPROG= 2k, Current Mode530mAStandby Mode, VBAT = 4.2V0 +/-1+/-5µAShutdown Mode (RPROGNot Connected)+/-0.5+/-5µAIBATBAT Pin CurrentSleep Mode, VCC= 0V+/-1+/-5µAITRIKLTrickleChargeCurrentVBAT< VTRIKL, RPROG= 10k10mAVTRIKLTrickle Charge Threshold VoltageRPROG= 10k, VBATRisin
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