LP3947_TI USB/交流适配器，单节锂离子电池充电器 IC

LP3947的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：电池管理 IC - 电池充电器 IC
功能描述：USB/交流适配器，单节锂离子电池充电器 IC
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LP3947的产品详情：

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.

LP3947的优势和特性：

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

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LP3947的参数（英文）：

Number of series cells
1
Charge current (Max) (A)
0.75
Operating 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 Vin (safety rating) (Max) ((V))
6.5
Control interface
I2C
Features
BAT temp thermistor monitoring (hot/cold profile)
Operating Vin (Min) (V)
4.3
Rating
Catalog

LP3947具体的完整产品型号参数及价格（美元）：

LP3947的完整型号有：LP3947ISD-09/NOPB、LP3947ISD-51/NOPB，以下是这些产品的关键参数及官网采购报价：

LP3947ISD-09/NOPB，工作温度：-40 to 85，封装：WSON (NHL)-14，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LP3947ISD-09/NOPB的批量USD价格：1.162（1000+）

LP3947ISD-51/NOPB，工作温度：-40 to 85，封装：WSON (NHL)-14，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LP3947ISD-51/NOPB的批量USD价格：1.162（1000+）

LP3947的评估套件：

LP3947的电路图解：

LP3947的评估套件：