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单节充电管理

ME4054B-N

    ME4054B-N是一款完整的单电池锂离子电池恒流/恒压线性充电器。此外,ME4054B-N专门设计用于USB电源规格。
    由于内部PMOSFET架构,不需要外部感测电阻器,也不需要阻塞二极管。热反馈调节充电电流,以限制高功率操作或高环境温度期间的芯片温度。充电电压固定在4.2V,充电电流可以通过单个电阻器进行外部编程。当达到最终浮动电压后,充电电流降至编程值的十分之一时,ME4054B-N自动终止充电循环。
    卸下输入电源(墙壁适配器或USB电源)后,ME4054B-N自动进入低电流状态,将电池漏电流降至2μa以下。可以将ME4054B-N置于关机模式,将电源电流降至55μA。
    其他功能包括充电电流监测、欠压锁定、自动充电和状态。
    ME4054B-N General Description:
        ME4054B-N is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the ME4054B-N 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 PMOSFET 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 ME4054B-N 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 ME4054B-N automatically enters a low current state dropping the battery drain current to less than 2μA.The ME4054B-N can be put into shutdown mode reducing the supply current to 55μA.
        Other features include charge current monitor, under voltage lockout, automatic recharge and a status.

    ME4054B-N Features:
    programmable charge current:20-500mA
    charge termination:3C/10 charge termination
    No MOSFET sense resistor or blocking diode required
    Complete Linear Charger in ThinSOT Package for Single Cell Lithium-Ion Batteries
    Constant-Current/Constant-Voltage operation with thermal regulation to maximize Rate Without risk of overheating.
    Preset 4.2V charge voltage with ±1% accuracy
    Automatic Recharge
    55μA supply current in shutdown
    2.9V trickle current charge threshold
    Soft-Start limits inrush current
    Charge Status Output Pin

    ME4054B-N Typical Application:
    Cellular Telephones, PDAs, MP3 Players
    Charging Docks and Cradles
    Bluetooth Applications

    ME4054B-N Package:
    5-pin SOT23-5

    ME4054B-N Typical Application Circuit:
    ME4054B-N Selection Guide:
    product series
    Stable Output voltage

    Programmable charge current range

    Charging terminated
    ME4054BM5G-N
    VFLOAT =4.2V
    20-500mA
    3C/10

    ME4054B-N Pin Configuration:
    ME4054B-N Block Diagram:
    请提交您的基本信息,发邮件Sales@ChipSourceTek.com,或者打电话给我们,13823761625(微信同号),我们将会尽快与您联系!

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