AP4056

AP4056一款完整的恒定电流/恒定电压线性控制单节锂离子电池充电器，具有电池正负极反接保护功能。其ESOP - 8封装与较少的外部元件数目使得AP4056成为便携式应用的理想选择。AP4056可以适合USB电源和适配器电源工作。 由于采用了内部PMOSFET架构，加上防倒充电路，所以不需要外部检测电阻器和隔离二极管。热反馈可对充电电流进行自动调节，以便在大功率操作或高环境温度条件下对芯片温度加以限制。充满电压固定于4.20V，而充电电流可通过一个电阻器进行外部设置。当电池达到4.20V之后，充电电流降至设定值1/10，AP4056将自动终止充电。 当输入电压（交流适配器或USB电源）被拿掉时，AP4056自动进入一个低电流状态，电池漏电流在3uA以下。AP4056的其他特点包括充电电流监控器、欠压闭锁、自动再充电和两个用于指示充电结束和输入电压接入的状态引脚。

AP4056 is a complete CC/CV linear charger for single cell lithium - ion batteries. It has the function of positive and negative electrode protection for battery. Its ESOP - 8 package and low external component count make the AP4056 ideally suited for portable applications. Furthermore, the AP4056 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 fedback 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 AP4056 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 AP4056 automatically enters a low current state dropping the battery drain current to less than 3μA. Other features include charge current monitor, under - voltage lockout, automatic recharge and two status pins to indicate charge and charge termination.

• 预设4.20V±1%精度的充电电压Preset 4.20V charge voltage with ±1% accuracy
• 最大输入电压：8V Maximum input voltage is 8V
• 具有BAT - VIN防倒灌功能With BAT - VIN anti - backflow function
• 线性充电模式，内置1A MOSFET，涓流/恒流/恒压三段式充电，充电电流外部可调Linear charge mode, built - in 1A MOSFET, Trickle /Constant current/Constant voltage three stage charging, externally adjustable charging charging current
• 支持对0V电池充电Supports 0V battery charging
• 短路保护，电池正负极反接保护Short circuit protection, battery polarity reverse polarity protection
• 智能温控技术，充电电流会随温度升高而降低，130度开始下降，最低可降至0Intelligent temperature control technology, charging current will decrease with increasing temperature, 130°C began to decline, the lowest can be reduced to 0
• 软启动限制了浪涌电流Soft - Start limits inrush current
• 可直接从USB端口给单节锂离子电池充电Charges single cell Li - ion batteries Directly from USB port
• 自动再充电Automatic recharge
• 4KV ESD
• 无卤产品Halogen - free Product

• 适用于USB电源和适配器电源，蓝牙应用及其他便捷式设备
• Suitable for USB power and adapter power, Bluetooth applications and other portable devices