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CST4056E

    CST4056E is a complete CC/CV linear charger for single cell lithium-ion batteries. It 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 P-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 CST4056E automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
    When the input supply (wall adapter or USB supply) is removed the CST4056E automatically enters a low current state dropping the battery drain current to less than 1μA. 
    The CST4056E can be put into shutdown mode reducing the supply current to 35μA.Other features include Battery temperature monitor, under-voltage lockout, automatic recharge and two status pins to indicate charge and charge termination
    CST4056E Description:
        CST4056E is a complete CC/CV linear charger for single cell lithium-ion batteries. It 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 P-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 CST4056E automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
        When the input supply (wall adapter or USB supply) is removed the CST4056E automatically enters a low current state dropping the battery drain current to less than 1μA. 
        The CST4056E can be put into shutdown mode reducing the supply current to 35μA.Other features include Battery temperature monitor, under-voltage lockout, automatic recharge and two status pins to indicate charge and charge termination

    CST4056E Features:
    Programmable Charge Current Up to 1A
    Preset 4.2V charge voltage with ±1% accuracy
    No MOSFET,Sense Resistor or blocking Diode Required
    Constant-Current/Constant-Voltage operation with Thermal Regulation to maximize Charge Rate Without Risk of overheating
    Charges Single Cell Li-Ion Batteries Directly from USB port
    Automatic recharge
    Battery Reverse Polarity Voltage Protection
    Charge Status Output Pin Two Status Indication for Charge status
    C/10 Charge Termination
    35µA Supply Current in Shutdown 
    2.9V Trickle Charge Threshold
    Soft-Start Limits Inrush Current
    Monitor output charge current
    Output with protection against anti-irrigation
    Battery Temperature Sensing 
    Available Package:ESOP-8
    RoHS Compliant and Lead (Pb) Free

    CT4056E Application:
    Cellular Telephones
    Charging Docks and Cradles 
    Bluetooth Application
    Wearable Application

    CST4056E Typical Application Circuit



    CST4056E Pin Configuration (ESOP-8)



    CST4056E Pin Description:





    CST4056E Order Information:
    Model Marking Description Package T/R Qty

    CST4056E

    CST4056E

    XXXXX

    CST4056E;1A;Standalone Linear Li-lon Battery Charger; 2 Charge Status

    ESOP-8

    4,000 PCS



    CST4056E Functional Block Diagram:

     
    CST4056E PACKAGE:
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