Back to Texas Instruments

Texas Instruments bq25898/bq25898D I2C Controlled Charger ICs

Texas Instruments bq25898/bq25898D I2C Controlled Single Cell Charger ICs are a highly-integrated switch-mode battery charge management and system power path management devices for a single cell Li-Ion and Li-polymer battery. The device supports the high input voltage fast charging. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during discharging phase. The I2C serial interface with charging and system settings make the Texas Instruments bq25898/bq25898D a truly flexible solution.

Features

  • High-efficiency 4A, 1.5MHz switch-mode buck charge
    • 92% charge efficiency at 3A and 91% charge efficiency at 4A charge current
    • Optimize for high voltage input (9V/12V)
    • Low-power PFM mode for light load operations
  • USB On-the-Go (OTG) with adjustable output from 4.5V to 5.5V
    • Selectable 500KHz / 1.5MHz boost converter with up to 2.4A output
    • 93% boost efficiency at 5V at 1A output
    • Accurate hiccup mode overcurrent protection
  • Single input to support USB input and adjustable high voltage adapters
    • Support 3.9V to 14V input voltage range
    • Input current limit (100mA to 3.25A with 50mA resolution) to support USB2.0, USB3.0 standard, and high voltage adapters
    • Maximum power tracking by input voltage limit up to 14V for a wide range of adapters
    • Auto-detect USB SDP, CDP, DCP, and non-standard adapters (bq25898)
    • Programmable D+/D- drivers for non-standard adapter handshake
  • Remote battery sensing
  • Input Current Optimizer (ICO) to maximize input power without overloading adapters
  • Resistance compensation (IRCOMP) from charger output to cell terminal
  • Highest battery discharge efficiency with 5mΩ battery discharge MOSFET up to 9A
  • Integrated ADC for system monitor (voltage, temperature, charge current)
  • Narrow VDC (NVDC) power path management
    • Instant-on works with no battery or deeply discharged battery
    • Ideal diode operation in battery supplement mode
  • BATFET control to support ship mode, wake up, and full system reset
  • Flexible autonomous and I2C mode for optimal system performance
  • High integration includes all MOSFETs, current sensing, and loop compensation
  • 12µA low battery leakage current to support ship mode
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±5% charge current regulation
    • ±7.5% input current regulation
  • Safety
    • Battery temperature sensing for charge and boost mode
    • Thermal regulation and thermal shutdown
    • Available in 2.8mm×2.5mm 42-ball DSBGA package

Applications

  • Smartphone
  • Tablet PC
  • Portable internet devices

Simplified Schematic

Schematic - Texas Instruments bq25898/bq25898D I2C Controlled Charger ICs

Evaluation Module

Texas Instruments bq25898EVM/bq25898DEVM Evaluation Modules (EVMs)

Complete charger module for evaluating the bq25898 or bq25989D, switch-mode battery charge devices.

Learn Moreabout Texas Instruments bq25898EVM/bq25898DEVM Evaluation Modules (EVMs) View Productsrelated to Texas Instruments bq25898EVM/bq25898DEVM Evaluation Modules (EVMs)
Published: 2016-05-23 | Updated: 2022-03-11