• High Efficiency 3-A, 1.5-MHz Switch Mode Buck Charge
  • 92.5% Charge Efficiency at 2 A and 90.5% Charge Efficiency at 3 A Charge Current
  • Optimize for High Voltage Input (9 V / 12 V)
  • Low Power PFM mode for Light Load Operations
• USB On-the-Go (OTG) with Adjustable Output from 4.5 V to 5.5 V
  • Selectable 500-KHz / 1.5-MHz Boost Converter with up-to 2 A Output
  • 93% Boost Efficiency at 5 V at 1 A Output
  • Accurate Hiccup Mode Overcurent Protection
  • Support down-to 2.5V Battery
  • Support PWM only or PFM/PWM control for Light Load Efficiency
• Single Input to Support USB Input and Adjustable High Voltage Adapters
  • Support 3.9-V to 14-V Input Voltage Range
  • Input Current Limit (100 mA to 3.25 A with 50-mA resolution) to Support USB2.0, USB3.0 standard and High Voltage Adapters
  • Maximum Power Tracking by Input Voltage Limit up-to 14V for Wide Range of Adapters
• 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 11-mΩ Battery Discharge MOSFET up to 9 A
• 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
• 12-µA 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

• Smart Phone
• Tablet PC
• Portable Internet Devices

The bq25896 is a highly-integrated 3-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. The devices support 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 makes the device a truly flexible solution.