BQ25890 1S 5A Fast Charger MaxCharge™ Technology for High Input Voltage and Adjustable USB OTG Boost | TI.com

BQ25890 (ACTIVE)

1S 5A Fast Charger MaxCharge™ Technology for High Input Voltage and Adjustable USB OTG Boost

1S 5A Fast Charger MaxCharge™ Technology for High Input Voltage and Adjustable USB OTG Boost - BQ25890
 

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.

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.

View more

Parametrics Compare all products in Battery Charger IC

 
Number of Series Cells
Function
Cell Chemistry
Charge Current (Max) (A)
Operating Vin (Min) (V)
Operating Vin (Max) (V)
Absolute Vin (safety rating) (Max) ((V))
Battery Charge Voltage (Min) (V)
Battery Charge Voltage (Max) (V)
Features
Control Interface
Control Topology
Rating
Operating Temperature Range (C)
Pin/Package
BQ25890 BQ25892 BQ25896 BQ25898
1     1     1     1    
Charger     Charger     Charger     Charger    
Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer    
5     5     3     4    
3.9     3.9     3.9     3.9    
14     14     14     14    
22     22     22     22    
3.84     3.84     3.84     3.84    
4.6     4.6     4.6     4.6    
IINDPM
ICO
Integrated ADC
Integrated FET
JEITA BAT Temp Monitoring (Thermistor Pin)
USB OTG
OVP
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation
USB D+/D-/BC1.2
USB C/PD    
IINDPM
ICO
Integrated ADC
Integrated FET
JEITA BAT Temp Monitoring (Thermistor Pin)
USB OTG
OVP
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation    
ICO
IINDPM
Integrated ADC
Integrated FET
JEITA BAT Temp Monitoring (Thermistor Pin)
USB OTG
OVP
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation    
ICO
IINDPM
Integrated ADC
Integrated FET
JEITA BAT Temp Monitoring (Thermistor Pin)
USB OTG
OVP
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation
USB D+/D-/BC1.2    
I2C
Standalone (RC-Settable)    
I2C
Standalone (RC-Settable)    
I2C
Standalone (RC-Settable)    
I2C
Standalone (RC-Settable)    
Switch-Mode Buck     Switch-Mode Buck     Switch-Mode Buck     Switch-Mode Buck    
Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 125    
24WQFN     24WQFN     24WQFN     42DSBGA    

WEBENCH® Designer BQ25890

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