BQ25895 (ACTIVE)

Single Cell 5A Fast Charger MaxCharge™ Technology for High Input Voltage and 3.1A Boost

Single Cell 5A Fast Charger MaxCharge™ Technology for High Input Voltage and 3.1A Boost - BQ25895


The bq25895 is a highly-integrated 5-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.

The device supports a wide range of input sources, including standard USB host port, USB charging port, and USB compliant adjustable high voltage adapter. To support fast charging using adjustable high voltage adapter, the bq25895 provides support MaxChargeTM using D+/D– pins and DSEL pin for USB switch control. In addition, the device includes interface to support adjustable high voltage adapter using input current pulse protocol. To set the default input current limit, device uses the built-in USB interface. The device is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. In addition, the Input Current Optimizer (ICO) supports the detection of maximum power point detection of the input source without overload. The device supports battery boost operation by supplying adjustable 4.5V-5.5V on PMID pin with up to 3.1A with integrated charge and boost mode detection


  • High Efficiency 5-A, 1.5-MHz Switch Mode Buck
    • 93% Charge Efficiency at 2 A and 91% Charge
      Efficiency at 3 A Charge Current
    • Optimize for High Voltage Input (9 V to 12 V)
    • Low Power PFM mode for Light Load
  • Boost Mode Operation with Adjustable Output
    from 4.5 V to 5.5 V
    • Selectable 500-KHz to 1.5-MHz Boost
      Converter with up to 3.1-A Output
    • 93% Boost Efficiency at 5 V at 1 A Output
  • Integrated Control to Switch Between Charge and
    Boost Mode
  • 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
    • Auto Detect USB SDP, CDP, DCP, and Non-
      standard 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
  • 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

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Parametrics Compare all products in Battery Charger IC

Number of Series Cells
Cell Chemistry
Battery Charge Voltage (Min) (V)
Battery Charge Voltage (Max) (V)
Charge Current (Max) (A)
Control Interface
Control Topology
Operating Temperature Range (C)
Operating Vin (Min) (V)
Operating Vin (Max) (V)
Absolute Vin (safety rating) (Max) ((V))
Integrated FET
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation
USB Detection   
Standalone (RC-Settable)   
Switch-Mode Buck   
-40 to 85   

WEBENCH® Designer BQ25895

Battery Specifications:
Chemistry Lithium Ion/Lithium Polymer
  Series Parallel
Cell Count
Cell Capacity  mAh  
Total Capacity mAh  
Charger Specifications:
  Min   Max Range
Vin  V 3.90 to 14.00V
Iin  A ≤ 3.25A
Vchg  V 3.84 to 4.608V
Ichg  A ≤ 5.056A
Ambient Temp  °C -40 to 85°C