I2C 1cell 5A buck battery charger with NVDC Power Path and PSEL
Product details
Parameters
Package | Pins | Size
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
- USB On-the-Go (OTG) with Adjustable Output from 4.5 V to 5.5 V
- 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-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 bq25890 With the WEBENCH® Power Designer and bq25892 With the WEBENCH® Power Designer
All trademarks are the property of their respective owners.
Description
The bq25890, bq25892 are 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 bq25890/2 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. It features fast charging with high input voltage support for a wide range of smartphone, tablet and portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. It also integrates Input Current Optimizer (ICO) and Resistance Compensation (IRCOMP) to deliver maximum charging power to battery. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate drive and battery monitor for simplified system design. 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 bq25890 provides support for MaxChargeTM handshake using D+/D– pins and DSEL pin for USB switch control. In addition, both bq25890 and bq25892 include 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 (bq25890) or takes the result from detection circuit in the system (bq25892), such as USB PHY device. 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 also meets USB On-the-Go (OTG) operation power rating specification by supplying 5 V (Adjustable 4.5 V to 5.5 V) on VBUS with current limit up to 2.4 A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5-V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement Mode operation prevents overloading the input source.
The device initiates and completes a charging cycle without software control. It automatically detects the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The charger provides various safety features for battery charging and system operations, including battery temperature negative thermistor monitoring, charging safety timer and overvoltage/overcurrent protections. The thermal regulation reduces charge current when the junction temperature exceeds 120°C (programmable). The STAT output reports the charging status and any fault conditions. The PG output (bq25892) indicates if a good power source is present. The INT immediately notifies host when fault occurs.
The device also provides a 7-bit analog-to-digital converter (ADC) for monitoring charge current and input/battery/system (VBUS, BAT, SYS, TS) voltages. The QON pin provides BATFET enable/reset control to exit low power ship mode or full system reset function.
The device family is available in 24-pin, 4 x 4 mm2 x 0.75 mm thin WQFN package.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The bq25892 evaluation module (EVM) is a complete charger module for evaluating the highly-integrated switch-mode battery charge management and system power path management device for 1 cell Li-Ion and Li-polymer battery in a wide range of smartphone and tablet applications.
The BQ25892EVM-664 (...)
Features
- Input voltage range: 3.9V to 14V
- I2C communication
- LED indication for status signals
- Test points for key signals available for testing purposes
- Jumpers for different circuit configuration.
Description
Features
- Easy to use impedance track gas gauge
- Accurate cell current, temperature and voltage monitoring
- Over-voltage, under-voltage, over-current, over-temperature and under-temperature protection
- 1-mOhm sense resistor
- On-board EV2400
- On-board dual programmable chargers
Software development
Features
- Real-time Gauge Dashboard for monitoring basic registers
- Full register access and logging
- Full data memory access and logging
- Product configuration and monitoring tools
- Import and export of product configurations
- Calibration and test automation
- Export of FS files for the target production environment
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- bq25890
Linux Source Files
The (...)
Design tools & simulation
Reference designs
Design files
-
download TIDA-00538 BOM.pdf (73KB) -
download TIDA-00538 Assembly Drawing.pdf (239KB) -
download TIDA-00538 PCB.pdf (656KB) -
download TIDA-00538 Gerber.zip (1900KB)
Design files
-
download TIDA-00590 BOM.pdf (189KB) -
download TIDA-00590 CAD Files.zip (1384KB) -
download TIDA-00590 Gerber.zip (557KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WQFN (RTW) | 24 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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