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DATA SHEET
BQ25882 I2C Controlled, 2-Cell, 2-A Boost-Mode Battery Charger For USB Input
1 Features
- High-efficiency 2-A, 1.5-MHz switch mode boost charger
- 92.5% Charge efficiency at 7.6-V battery, 1-A charge
- Optimized for USB input and 2-cell Li-Ion output
- Selectable low power PFM mode for light load operation with out-of-audio option
- USB On-the-Go (OTG) with adjustable output from 4.5 V to 5.5 V
- Buck converter with up-to 2-A output
- 94.5% Efficiency at 5-V, 1-A output
- Accurate constant current (CC) limit
- Output short protection
- Selectable low power PFM mode for light load operation with out-of-audio option
- Single Input to support USB input adapters
- Supports 3.9-V to 6.2-V input voltage range with 20-V absolute maximum input voltage rating
- Input current limit (500 mA to 3.3 A with 100-mA resolution) to support USB2.0, USB3.0 standard adapters
- Maximum power tracking by input voltage limit up-to 5.5 V
- Auto-detect USB SDP, CDP, DCP, and non-standard adapters
- Input current optimizer (ICO) to maximize input power without overloading adapters
- Highest battery discharge efficiency with 15-mΩ battery discharge MOSFET
- Integrated ADC for system monitoring (BUS voltage and current, BAT voltage, charge current, SYS voltage, and NTC and die temperature)
- Narrow VDC (NVDC) power path management
- Instant-on works with no battery or deeply discharged battery
- Ideal diode operation in battery supplement mode
- Flexible autonomous and I2C mode for optimal system performance
- High integration includes all MOSFETs, current sensing and loop compensation
- High accuracy
- ±0.4% Charge voltage regulation
- ±7.5% Charge current regulation
- ±7.5% Input current regulation
- Safety
- Battery temperature sensing in charge and OTG buck mode
- Thermal regulation and thermal shutdown
2 Applications
- Wireless speaker
- Digital camera (DSC, DVC)
- Mobile printer
- Tablet
- Eletronic point of sales (ePOS)
- Portable electronic devices
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