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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