BQ25895RTWR Power Path Management IC Battery Management I2C Contd Sing Cell 5A NVDC Charger

BQ25895RTWR Power Path Management IC Battery Management I2C Contd Sing Cell 5A NVDC Charger

1 Features

• High Efficiency 5-A, 1.5-MHz Switch Mode Buck Charge

• – 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 Operations

• 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 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

• – Create a Custom Design Using the bq25895

  With the WEBENCH® Power Designer

2 Applications

• Power Bank, Mobile Wi-Fi Hotspot

• Wireless Bluetooth Speaker
• Portable Internet Devices

3 Description

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.

Device Information