A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER
●The A4051 is a complete constant current & constant voltage linear charger for single cell lithium-ion batteries. Its PSOP8 package and low external component count make the A4051 ideally suited for portable applications. Furthermore,the A4051 is specifically designed to work within USB power specifications.
●No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The A4051 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed valueafter the final float voltage is reached.
●When the input supply (wall adapter or USB supply) is removed, the A4051 automatically enters a low current state, dropping the battery drain current to less than 0.5uA. The A4051 can be put into shutdown mode,reducing the supply current to 50uA.
●Other features include Battery temperature monitor,under-voltage lockout, automatic recharge and two statuspins to indicate charge and charge termination.The A4051 is availablein PSOP8 package
■FEATURES
●Programmable Charge Current Up to 1000mA
●1/10th of the constant charge current
●No MOSFET, Sense Resistor or Blocking Diode Required
●Complete Linear Charger in PSOP8 Package for single Cell Lithium-Ion Batteries
●Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
●Charges Single Cell Li-Ion Batteries Directly fromUSB Port
●Preset 4.2VCharge Voltage
●Charge Current Monitor Output for Gas Gauging
●Automatic Recharge
●Charge state pairs of output, no battery and faultstatus display
●C/10 Charge Termination
●50uA Supply Current in Shutdown
●2.9V Trickle Charge Threshold
●Soft-Start Limits Inrush Current
●Battery temperature monitoring function
●Available in PSOP8 packag
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A4051MP8R 、 A4051MP8VR 、 A4051MP8R-A 、 A4051MP8VR-A 、 A4051 |
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[ Cellular Telephones ][ PDAs ][ MP3 Players ][ MP4 Players ][ Charging Docks ][ Cradles ][ Bluetooth ][ GPS Application ] |
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Datasheet |
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Please see the document for details |
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PSOP8 |
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English Chinese Chinese and English Japanese |
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MAY 2021 |
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REV1.5 |
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718 KB |
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