bq25882 2 A Boost-Mode Battery Charger

By Texas Instruments 78

bq25882 2 A Boost-Mode Battery Charger

Texas Instruments' bq25882 is a highly-integrated 2 A switch-mode battery charge management and system power-path management device for dual-cell Li-Ion and Li-polymer batteries. The I2C serial interface with charging and system settings makes the device an ultra-flexible solution.

  • 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
  • USB on-the-go (OTG) with adjustable output from 4.5 V to 5.5 V:
    • Buck converter with output up to 2 A
    • 94.5% efficiency at 5 V, 1 A output
    • Accurate constant current (CC) limit
    • Output short protection
  • Input current optimizer (ICO) to maximize input power without overloading adapters
  • Ultra-high 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)
  • Thermal regulation and thermal shutdown
  • Battery temperature sensing in charge and OTG buck mode
  • Single input to support USB input adapters:
    • Supports input voltage range of 3.9 V to 6.2 V with an input voltage rating of 20 V (maximum)
    • Input current limit (500 mA to 3.3 A with 100 mA resolution) to support USB2.0 and USB3.0 standard adapters
    • Auto-detect USB SDP, CDP, DCP, and non-standard adapters
  • 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 accuracy:
    • Charge voltage regulation: ±0.4%
    • Charge current regulation: ±7.5%
    • Input current regulation: ±7.5%
  • High integration includes MOSFETs, current-sensing, and loop compensation
  • Wireless speakers
  • Digital cameras (DSC, DVC)
  • Mobile printers
  • Tablets
  • Electronic point-of-sales (ePOS)
  • Portable electronic devices

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