I2C Controlled 4.5A Single Cell USB / Adaptor Charger - BQ24190

BQ24190 (ACTIVE)

I2C Controlled 4.5A Single Cell USB / Adaptor Charger

Description

The bq24190, bq24192, bq24192I, and bq24193 are highly-integrated switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer battery in a wide range of tablet and other portable devices. Its 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 device supports a wide range of input sources, including standard USB host port, USB charging port and high power DC adapter. To set the default input current limit, the bq24190 detects the input source following the USB battery charging spec 1.2, and the bq24192, bq24192I, and bq24193 takes the results from detection circuit in the system, such as USB PHY device. The bq24190,192,192I, and 193 are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. Meanwhile, the bq24190, bq24192, bq24192I, and bq24193 meets USB On-the-Go operation power rating specification by supplying 5V on the VBUS with a current limit up to 1.3A.

The power path management regulates the system slightly above battery voltage but does not drop below 3.5V 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 devices initiate and complete 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 bq24190, bq24192, bq24192I, and bq24193 provide various safety features for battery charging and system operation, including dual pack negative thermistor monitoring, charging safety timer and over-voltage/over-current protections. The bq24193 supports JEITA guideline compliant temperature profile. 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 in the bq24192, bq24192I, and bq24193 indicates if a good power source is present. The INT immediately notifies the host when a fault occurs.

The bq24190, bq24192, bq24192I, and bq24193 are available in a 24-pin, 4x4 mm2 thin QFN package.

Features

  • High Efficiency 4.5A Switch Mode Charger
    • 92% Charge Efficiency at 2A, 90% at 4A
    • Accelerate Charge Time by Battery Path Impedance Compensatioin
  • Highest Battery Discharge Efficiency with 12mΩ Battery Discharge
    MOSFET up to 9A Discharge Current
  • Single Input USB-compliant/Adapter Charger
    • USB Host or Charging Port D+/D- Detection Compatible to
      USB Battery Charger Spec 1.2
    • Input Voltage and Current Limit Supports USB2.0 and USB 3.0
    • Input Current Limit: 100mA, 150mA, 500mA, 900mA, 1.2A, 1.5A, 2A and 3A
  • 3.9V–17V Input Operating Voltage Range
    • Support All Kinds of Adapter with Input Voltage DPM Regulation
  • USB OTG 5V at 1.3A Synchronous Boost Converter Operation
    • 93% 5V Boost Efficiency at 1A
  • Narrow VDC (NVDC) Power Path Management
    • Instant-on Works with No Battery or Deeply Discharged Battery
    • Ideal Diode Operation in Battery Supplement Mode
  • 1.5MHz Switching Frequency for Low Profile Inductor
  • Autonomous Battery Charging with or without Host Management
    • Battery Charge Enable
    • Battery Charge Preconditioning
    • Charge Termination and Recharge
  • High Accuracy (0°C to 125°C)
    • ±0.5% Charge Voltage Regulation
    • ±7% Charge Current Regulation
    • ±7.5% Input Current Regulation
    • ±2% Output Regulation in Boost Mode
  • High Integration
    • Power Path Management
    • Synchronous Switching MOSFETs
    • Integrated Current Sensing
    • Bootstrap Diode
    • Internal Loop Compensation
  • Safety
    • Battery Temperature Sensing and Charging Safety Timer
    • JEITA Guideline Compliant (bq24193)
    • Thermal Regulation and Thermal Shutdown
    • Input System Over-Voltage Protection
    • MOSFET Over-Current Protection
  • Charge Status Outputs for LED or Host Processor
  • Low Battery Leakage Current and Support Shipping Mode
  • 4mm × 4mm QFN-24 Package

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Parametrics Compare all products in Battery Chargers and Front-End Solutions

 
Function
Cell Chemistry
# Series Cells
Vin (Max) (V)
Special Features
Battery Charge Voltage (V)
Charge Current (Max) (A)
Control Topology
Control Interface
USB Type
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ24190 BQ24192 BQ24192I BQ24193 BQ24196 BQ24296 BQ24297
Charger     Charger     Charger     Charger     Charger     Charger     Charger    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
 
Single Cell     Single Cell       Single Cell     Single Cell     Single Cell      
17     17     17     17     17     6     6    
  Power Path     Power Path     JEITA
Power Path    
Power Path     Power Path
Temp Monitoring    
Power Path
Temp Monitoring    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
4.5     4.5     4.5     4.2     2.5     3     3    
Switch-Mode     Switch-Mode     Switch-Mode       Switch-Mode     Switch-Mode     Switch-Mode    
I2C     I2C     I2C     I2C     I2C     I2C     I2C    
  USB PSEL     USB PSEL     USB PSEL       USB PSEL     USB D+/D-
USB OTG    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
24VQFN     24VQFN     24VQFN     24VQFN     24VQFN     24VQFN     24VQFN    
2.50 | 1ku     2.50 | 1ku     2.50 | 1ku     2.50 | 1ku     2.25 | 1ku     1.95 | 1ku     1.95 | 1ku    
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