BQ25881中文资料适用于 USB 输入且采用 QFN 封装的 I2C 控制型 2 节电池 2A 升压模式电池充电器数据手册TI规格书

描述 Description

The BQ25881 is ahighly-integrated 2A switch-mode battery charge management and system power path management devicefor dual-cell Li-Ion and Li-polymer battery.The BQ25881 hasI2C control with OTG and Power Path.

特性 Features

• High-Efficiency 2-A, 1.5MHz Switch Mode BoostCharger
• 92.5% Charge Efficiency at 5V Adapter, 7.6-V Battery, 1-ACharge
• Selectable Low Power PFM mode for Light LoadOperation
• Single Input to support USB InputAdapters
• Supports3.9 V – 6.2 V Input Voltage Range with 20-V Absolute Maximum InputVoltage Rating
• Maximum Power Tracking by InputVoltage Limit up-to 5.5 V
• Power Path Management andI2C Control
• Highest Battery Discharge Efficiency with 20-mΩ (TBD) BatteryDischarge MOSFET
• Instant-on Works with No Battery or Deeply Discharged Battery
• Ideal Diode Operation in Battery Supplement Mode
• USB On-the-Go (OTG) with Adjustable Output from 4.5V to 5.5V
• Buck Converter with up-to 2 A Output
• Accurate Constant Current (CC) Limit and Output Short Protection
• Input Current Optimizer (ICO) to Maximize Input Power withoutOverloading Adapters
• High Integration includes all MOSFETs, Current Sensing andLoop Compensation
• ±0.5% Charge Voltage Regulation
• ±7.5%Input Current Regulation
• Safety
• Battery Temperature Sensing in Charge and OTG Buck Mode
• Thermal Regulation and Thermal Shutdown

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