BQ25881数据手册TI中文资料规格书

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
• Optimized for USB Input and 2-cell Li-Ionoutput
• 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
• Input Current Limit (500 mA to 3.3 A with100mA resolution) to support USB2.0, USB3.0 standard adapters
• Maximum Power Tracking by InputVoltage Limit up-to 5.5 V
• D+/D-Auto-detect USB SDP, CDP, DCP, and Non-standardAdapters

• Power Path Management andI2C Control
• Highest Battery Discharge Efficiency with 20-mΩ (TBD) BatteryDischarge MOSFET
• Narrow VDC (NVDC) Power Path Management
• 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
• 95% (TBD) Efficiency at 5 V, 1 A Output
• Accurate Constant Current (CC) Limit and Output Short Protection
• Selectable Low Power PFM mode for Light Load Operation with Out-of-AudioOption


• Input Current Optimizer (ICO) to Maximize Input Power withoutOverloading Adapters
• Integrated ADC for System Monitoring (BUS Voltage andCurrent, BAT Voltage, Charge Current, SYS Voltage, and NTC and Die Temperature)

• High Integration includes all MOSFETs, Current Sensing andLoop Compensation
• High Accuracy
• ±0.5% Charge Voltage Regulation
• ±5% Charge Current 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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