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 topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), 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 Compensatioin
  • 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 Operation
    • 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 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
    • 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
  • 4.00 mm x 4.00 mm QFN-24 Package

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The bq24193 is a highly-integrated switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer batteries 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. The bq24193 takes the result from detection circuit in the system, such as USB PHY device. The bq24193 is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. Meanwhile, the bq24193 meets USB On-the-Go operation power rating specification by supplying 5 V on VBUS with 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 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 device 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 also 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 bq24193 indicates if a good power source is present.The INT immediately notifies the host when a fault occurs.

The bq24193 is available in a 24-pin, 4.00 x 4.00 mm2 thin VQFN package.

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Technical documentation

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Type Title Date
* Data sheet bq24193 I2C Controlled 4.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG datasheet (Rev. A) Nov. 14, 2017
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
User guide bq24190 Calculation Tool Aug. 19, 2015
Technical article Summertime and the livin' is easy Jun. 20, 2014
User guide bq24190/2/2i/3/6 and bq24292i EVM (PWR021) (Rev. C) Aug. 28, 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

SLUC391A.ZIP (474 KB)

CAD/CAE symbols

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