BQ25890RTWR

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 12V)

- Low Power PFM mode for Light-Load Operations ·· USB On-the-Go(OTG) with Adjustable Output from 4.5V to 5.5V

- Selectable 500-kHz and 1.5-MHz Boost Converter with up-to 2.4-A Output

- 93% Boost Efficiency at 5 V at 1-A Output

- Accurate Hiccup Mode Overcurent Protection 

· 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 14 V for Wide Range of Adapters 

- Auto Detect USB SDP, CDP, DCP, and Non-Standard Adapters(bq25890)

· 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-m2 Battery Discharge MOSFET up to9A 

· 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

  -ldeal Diode Operation in Battery Supplement Mode

· BATFET Control to Support Ship Mode,Wake Up, and Full System Reset

· Flexible Autonomous and 12C 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 bq25890 With the WEBENCH? Power Designer and bq25892 With the WEBENCHO Power Designer

2 Applications

· Smart Phone

· Tablet PC

· Portable Internet Devices

3 Description 

The bq25890, bq25892 are highly-integrated 5-A switch-mode battery charge management and system power path management device for single cell Li-lon 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.

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