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电池充电器 IC

LP3947

最晚可采购期限

USB/交流适配器，单节锂离子电池充电器 IC

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数据表

LP3947

最晚可采购期限
数据表 立即订购

产品详情

Number of series cells 1 Charge current (max) (A) 0.75 Vin (max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 6.5 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.3 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 0.75 Vin (max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 6.5 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.3 Rating Catalog Operating temperature range (°C) -40 to 85
WSON (NHL) 14 16 mm² 4 x 4
  • Supports USB Charging Scheme
  • Integrated Pass Transistor
  • Near-Depleted Battery Preconditioning
  • Monitors Battery Temperature
  • Built-In 5.6 Hour Timer
  • Under Voltage and Over Voltage Lockout
  • Charge Status Indicators
  • Charge Current Monitor Analog Output
  • LDO Mode Operation can source 1 Amp
  • Continuous Over Current/Temperature Protection

Key Specifications

  • 1% Charger Voltage Accuracy Over
    0°C ≤ TJ ≤ 85°C
  • 4.3V to 6V Input Voltage Range
  • 100 mA to 750 mA Charge Current Range, in Charger Mode
  • 100 mA to 500 mA Charge Current Range, in USB Mode
  • WSON Package Power Dissipation:
    2.7W at TA = 25°C

All trademarks are the property of their respective owners.

  • Supports USB Charging Scheme
  • Integrated Pass Transistor
  • Near-Depleted Battery Preconditioning
  • Monitors Battery Temperature
  • Built-In 5.6 Hour Timer
  • Under Voltage and Over Voltage Lockout
  • Charge Status Indicators
  • Charge Current Monitor Analog Output
  • LDO Mode Operation can source 1 Amp
  • Continuous Over Current/Temperature Protection

Key Specifications

  • 1% Charger Voltage Accuracy Over
    0°C ≤ TJ ≤ 85°C
  • 4.3V to 6V Input Voltage Range
  • 100 mA to 750 mA Charge Current Range, in Charger Mode
  • 100 mA to 500 mA Charge Current Range, in USB Mode
  • WSON Package Power Dissipation:
    2.7W at TA = 25°C

All trademarks are the property of their respective owners.

The LP3947 is a complete charge management system that safely charges and maintains a Li-Ion battery from either USB power source or AC adaptor. In USB mode, the LP3947 supports charging in low power or high power mode. Alternatively, the LP3947 can take charge from AC adaptor. In both USB and AC adaptor modes, charge current, battery regulation voltage, and End of Charge (EOC) point can be selected via I2C interface. The LP3947 can also operate on default values that are pre-programmed in the factory. The battery temperature is monitored continuously at the Ts pin to safeguard against hazardous charging conditions. The charger also has under-voltage and over-voltage protection as well as an internal 5.6 hr timer to protect the battery. The pass transistor and charge current sensing resistor are all integrated inside the LP3947.

The LP3947 operates in four modes: pre-qualification, constant current, constant voltage and maintenance modes. There are two open drain outputs for status indication. An internal amplifier readily converts the charge current into a voltage. Also, the charger can operate in an LDO mode providing a maximum of 1.2 Amp to the load.

The LP3947 is a complete charge management system that safely charges and maintains a Li-Ion battery from either USB power source or AC adaptor. In USB mode, the LP3947 supports charging in low power or high power mode. Alternatively, the LP3947 can take charge from AC adaptor. In both USB and AC adaptor modes, charge current, battery regulation voltage, and End of Charge (EOC) point can be selected via I2C interface. The LP3947 can also operate on default values that are pre-programmed in the factory. The battery temperature is monitored continuously at the Ts pin to safeguard against hazardous charging conditions. The charger also has under-voltage and over-voltage protection as well as an internal 5.6 hr timer to protect the battery. The pass transistor and charge current sensing resistor are all integrated inside the LP3947.

The LP3947 operates in four modes: pre-qualification, constant current, constant voltage and maintenance modes. There are two open drain outputs for status indication. An internal amplifier readily converts the charge current into a voltage. Also, the charger can operate in an LDO mode providing a maximum of 1.2 Amp to the load.
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类型 标题 下载最新的英语版本 日期
* 数据表 LP3947 USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC 数据表 (Rev. B) 2013年 4月 2日
EVM 用户指南 AN-1341 LP3947 Evaluation Board (Rev. A) 2013年 4月 30日

设计和开发

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封装 引脚 下载
WSON (NHL) 14 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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