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LTC4061EDD-4.4 Datasheet(PDF) 1 Page - Linear Technology |
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LTC4061EDD-4.4 Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page LTC4061 4061fd Typical applicaTion FeaTures DescripTion Standalone Linear Li-Ion Battery Charger with Thermistor Input The LTC®4061 is a full-featured, flexible, standalone linear charger for single-cell Lithium-Ion batteries. It is capable of operating within USB power specifications. Both programmable time and programmable current based termination schemes are available. Furthermore, the CHRG open-drain status pin can be programmed to indicate the battery charge state according to the needs of the application. Additional safety features designed to maximize battery lifetime and reliability include NTC battery temperature sensing and the SmartStart charg- ing algorithm. No external sense resistor or external blocking diode is required for charging due to the internal MOSFET archi- tecture. Internal thermal feedback regulates the charge current to maintain a constant die temperature during high power operation or high ambient temperature condi- tions. The charge current is programmed with an external resistor. With power applied, the LTC4061 can be put into shutdown mode to reduce the supply current to 20µA and the battery drain current to less than 5µA. Other features include smart recharge, USB C/5 cur- rent programming input, undervoltage lockout and AC Present logic output. applicaTions n ChargeCurrentProgrammableUpto1A n ChargesSingle-CellLi-IonBatteriesDirectlyfrom USBPort n PresetChargeVoltagewith±0.35%Accuracy n ThermistorInputforTemperatureQualified Charging n InputSupplyPresentLogicOutput n ThermalRegulationMaximizesChargeRate WithoutRiskofOverheating n ProgrammableChargeCurrentDetection/ Termination n ProgrammableChargeTerminationTimer n Smart Pulsing Error Feature n SmartStart™ Prolongs Battery Life n 20µA Charger Quiescent Current in Shutdown n Available in a Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package n Handheld Computers n Portable MP3 Players n Digital Cameras 800mASingle-CellLi-IonBatteryCharger (C/10Termination) CompleteChargeCycle(1100mAhBattery) VCC TIMER PROG IDET BAT 800mA VIN 4.3V TO 8V 4.2V SINGLE-CELL Li-Ion BATTERY + 619 1µF ACPR NTC LTC4061 GND 4061 TA01a CHRG EN C/5 TIME (HOURS) 0 0.5 1.5 2.5 3.0 2.0 900 800 700 600 500 400 300 200 100 0 4.3 4.2 4.1 4.0 3.9 3.8 3.7 3.6 3.5 3.4 4061 TA01b 1.0 BATTERY CURRENT BATTERY VOLTAGE VCC = 5V TA = 25°C L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SmartStart, ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118. |
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