Product details


Number of series cells 1 Charge current (Max) (A) 4.5 Operating Vin (Max) (V) 17 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 3.5 Battery charge voltage (Max) (V) 4.4 Absolute Vin (safety rating) (Max) ((V)) 22 Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IINDPM (Input current limit), Input OVP, Power Path, USB D+/D-/BC1.2 integrated, USB OTG integrated Operating Vin (Min) (V) 3.9 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other Battery charger ICs


  • High Efficiency 4.5-A Switch Mode Charger
    • 92% Charge Efficiency at 2 A, 90% at 4 A
    • Accelerate Charge Time by Battery Path Impedance
  • Compatible with MaxLife Technology for Faster
    Charging When Used in Conjunction With bq27531
  • Highest Battery Discharge Efficiency with 12-mΩ
    Battery Discharge MOSFET up to 9-A 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 USB3.0
    • Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA,
      1.2 A, 1.5 A, 2 A and 3 A
  • 3.9-V to 17-V Input Operating Voltage Range
    • Support All Kinds of Adapter with Input
      Voltage DPM Regulation
  • USB OTG 5 V at 1.3-A Synchronous Boost Converter
    • 93% 5-V Boost Efficiency at 1 A
  • Narrow VDC (NVDC) Power Path Management
    • Instant-on Works with No Battery or Deeply
      Discharged Battery
    • Ideal Diode Operation in Battery Supplement Mode
  • 1.5-MHz Switching Frequency for Low Profile Inductor
  • Autonomous Battery Charging with or without Host
    • 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
    • Thermal Regulation and Thermal Shutdown
    • Input System Over-Voltage Protection
    • MOSFET Over-Current Protection
  • Charge Status Outputs for LED or Host
  • Low Battery Leakage Current and Support Shipping
  • 4.00 mm × 4.00 mm VQFN-24 Package
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The bq24190, bq24192, and bq24192I 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 and bq24192I take the results from detection circuit in the system, such as USB PHY device. The bq24190,192, and 192I are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. Meanwhile, the bq24190, bq24192, and bq24192I meet USB On-the-Go operation power rating specification by supplying 5 V on the VBUS with a current limit up to 1.3 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 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, and bq24192I 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 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 and bq24192I indicates if a good power source is present. The INT immediately notifies the host when a fault occurs.

The bq24190, bq24192, and bq24192I are available in a 24-pin, 4.00 × 4.00 mm2 thin VQFN package.

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Technical documentation

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Type Title Date
* Data sheet bq2419x I2C Controlled 4.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG datasheet (Rev. B) Dec. 29, 2014
Application note USB D+/D- Input Current Limit Detection Dec. 30, 2020
Technical article When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical article Should I use a linear charger or a switching charger? Oct. 31, 2015
Design guide bq24190 Calculation Tool Aug. 19, 2015
Technical article Summertime and the livin' is easy Jun. 20, 2014
Application note Dynamic power management for faster, more efficient battery charging Oct. 28, 2013
User guide bq24190/2/2i/3/6 and bq24292i EVM (PWR021) (Rev. C) Aug. 28, 2013
Technical article Battery Life… Unplanned Obsolescence Aug. 27, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The bq2419x evaluation module (EVM) is a complete charger module for evaluating an I2C-controlled single NVDC-1 charge using the bq2419x devices.

The BQ2419xEVM-021 requires USB Interface Adaptive Evaluation Module “USB-TO-GPIO” for I2C interface. If one is not already available to you (...)

  • High Efficiency 4.5A Switch Mode Charger
  • Highest Battery Discharge Efficiency at 2A, 90% at 4A
  • Single Input USB-Compliant/Adapter Charger
  • 3.9V-17V Input Operating Voltage Range
  • USB OTG 5V at 1.3A Synchronous Boost
  • Narrow VDC Power Path Management
  • 1.5MHz Switching Frequency for Low Profile Inductor
  • (...)

Software development

GUI software for use with USB2ANY and battery charging evaluation modules
TI-CHARGER-GUI — The TI-CHARGER-GUI offers a web-based or standalone graphical user interface to assist in the process of evaluating, designing with, configuring or testing battery charger products. The software provides full access to registers and an easy interface to send and sequence commands.
  • Web-based or standalone GUI with easy to follow graphic instructions
  • Configures supported battery charger evaluation modules (EVMs) through USB2ANY interface adaptor
  • Easy to navigate pages organized by functional groupings
  • Supports sequenced I2C or SMBus commands
Linux Driver for BQ24190
BQ24190SW-LINUX The Linux driver supports the BQ24190 I2C controlled 4.5-A single cell charger. The Linux driver supports communication through the I2C bus and interfaces with the power supply sub-system.


Linux mainline status

Available in Linux mainline: Yes
Available through N/A 

Linux source files

The (...)

SLUC391A.ZIP (474 KB)

Reference designs

Impedance Track™ Technology Enabled Battery Management Solution Reference Design
TIDA-00050 This reference design is designed for the bq20z65/bq29412 battery management system. It includes one bq20z65/bq29412 circuit module and a link to Windows™-based PC software. The circuit module design includes one bq20z65 integrated circuit (IC), one bq29412 IC and all other onboard (...)
document-generic Schematic document-generic User guide
I2C Controlled 4.5A Single Cell USB / Adaptor Charger Reference Design
TIDA-00035 This reference design is a highly-integrated switch-mode battery charge management and system power path management solution 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGE) 24 View options

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