Product details

Number of series cells 1 Charge current (Max) (A) 3 Operating Vin (Max) (V) 6.2 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 3.5 Battery charge voltage (Max) (V) 4.44 Absolute Vin (safety rating) (Max) ((V)) 15 Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, 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
Number of series cells 1 Charge current (Max) (A) 3 Operating Vin (Max) (V) 6.2 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 3.5 Battery charge voltage (Max) (V) 4.44 Absolute Vin (safety rating) (Max) ((V)) 15 Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, 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
VQFN (RGE) 24 16 mm² 4 x 4
  • 90% High Efficiency Switch Mode 3-A Charger
  • 3.9-V to 6.2-V Single Input USB-Compliant Charger with 6.4-V Over-Voltage Protection
    • USB Host or Charging Port D+/D– Detection Compatible to USB Battery Charger Spec (BC1.2)
    • Support Non-Standard 2-A/1-A Adapters Detection
    • Input Voltage and Current Limit Supports USB2.0 and USB 3.0
    • Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA, 1 A, 1.5 A, 2 A, and 3 A
  • Synchronous Boost Converter in Battery Boost Mode with
    • Adjustable Output 4.55 V – 5.5 V at 1.5 A
    • 90% 5.1-V Boost Mode Efficiency
    • Fast OTG Startup (22 ms Typ)
  • Narrow VDC (NVDC) Power Path Management
    • Instant System On with No Battery or Deeply Discharged Battery
    • Ideal Diode Operation in Battery Supplement Mode
  • 1.5-MHz Switching Frequency for Low Profile 1.2-mm Inductor
  • I2C Port for Optimal System Performance and Status Reporting
  • Autonomous Battery Charging with or without Host Management
    • Battery Charge Enable
    • Battery Charge Preconditioning
    • Charge Termination and Recharge
  • High Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±7% Charge Current Regulation
    • ±7.5% Input Current Regulation
    • ±3% Output Voltage Regulation in Boost Mode
  • High Integration
    • Power Path Management
    • Synchronous Switching MOSFETs
    • Integrated Current Sensing
    • Bootstrap Diode
    • Internal Loop Compensation
  • Safety
    • Battery Temperature Sensing for Charging and Discharging in Boost Mode
    • Battery Charging Safety Timer
    • Thermal Regulation and Thermal Shutdown
    • Input and System Over-Voltage Protection
    • MOSFET Over-Current Protection
  • Charge Status Outputs for LED or Host Processor
  • Maximum Power Tracking Capability by Input Voltage Regulation
  • 20-µA Low Battery Leakage Current and Support Shipping Mode
  • 4mm × 4mm VQFN-24 Package
  • 90% High Efficiency Switch Mode 3-A Charger
  • 3.9-V to 6.2-V Single Input USB-Compliant Charger with 6.4-V Over-Voltage Protection
    • USB Host or Charging Port D+/D– Detection Compatible to USB Battery Charger Spec (BC1.2)
    • Support Non-Standard 2-A/1-A Adapters Detection
    • Input Voltage and Current Limit Supports USB2.0 and USB 3.0
    • Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA, 1 A, 1.5 A, 2 A, and 3 A
  • Synchronous Boost Converter in Battery Boost Mode with
    • Adjustable Output 4.55 V – 5.5 V at 1.5 A
    • 90% 5.1-V Boost Mode Efficiency
    • Fast OTG Startup (22 ms Typ)
  • Narrow VDC (NVDC) Power Path Management
    • Instant System On with No Battery or Deeply Discharged Battery
    • Ideal Diode Operation in Battery Supplement Mode
  • 1.5-MHz Switching Frequency for Low Profile 1.2-mm Inductor
  • I2C Port for Optimal System Performance and Status Reporting
  • Autonomous Battery Charging with or without Host Management
    • Battery Charge Enable
    • Battery Charge Preconditioning
    • Charge Termination and Recharge
  • High Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±7% Charge Current Regulation
    • ±7.5% Input Current Regulation
    • ±3% Output Voltage Regulation in Boost Mode
  • High Integration
    • Power Path Management
    • Synchronous Switching MOSFETs
    • Integrated Current Sensing
    • Bootstrap Diode
    • Internal Loop Compensation
  • Safety
    • Battery Temperature Sensing for Charging and Discharging in Boost Mode
    • Battery Charging Safety Timer
    • Thermal Regulation and Thermal Shutdown
    • Input and System Over-Voltage Protection
    • MOSFET Over-Current Protection
  • Charge Status Outputs for LED or Host Processor
  • Maximum Power Tracking Capability by Input Voltage Regulation
  • 20-µA Low Battery Leakage Current and Support Shipping Mode
  • 4mm × 4mm VQFN-24 Package

The bq24295 is a highly-integrated switch-mode battery charge management and system power path management devices for 1 cell Li-Ion and Li-polymer battery in a wide range of power bank, tablet and other portable device applications.

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 3.9V – 6.2V USB input sources, including standard USB host port and USB charging port with 6.4V over-voltage protection. The bq24295 is compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. To set the default input current limit, the bq24295 detects the input source through D+/D– detection following the USB battery charging spec 1.2. In addition, the bq24295 detects non-standard 2A/1A adapters. The bq24295 supports battery boost operation by supplying adjustable voltage 4.55 – 5.5V (default 5.1V) on PMID pin with minimum current of 1.5A.

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 devices provide various safety features for battery charging and system operation, including 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 INT immediately notifies the host when a fault occurs.

The bq24295 is available in a 24-pin, 4×4 mm2 thin VQFN package.

The bq24295 is a highly-integrated switch-mode battery charge management and system power path management devices for 1 cell Li-Ion and Li-polymer battery in a wide range of power bank, tablet and other portable device applications.

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 3.9V – 6.2V USB input sources, including standard USB host port and USB charging port with 6.4V over-voltage protection. The bq24295 is compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. To set the default input current limit, the bq24295 detects the input source through D+/D– detection following the USB battery charging spec 1.2. In addition, the bq24295 detects non-standard 2A/1A adapters. The bq24295 supports battery boost operation by supplying adjustable voltage 4.55 – 5.5V (default 5.1V) on PMID pin with minimum current of 1.5A.

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 devices provide various safety features for battery charging and system operation, including 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 INT immediately notifies the host when a fault occurs.

The bq24295 is available in a 24-pin, 4×4 mm2 thin VQFN package.

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Technical documentation

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Type Title Date
* Data sheet bq24295 I2C Controlled 3A Single Cell USB Charger With Narrow VDC 4.5-5.5V Adjustable Voltage at 1.5A Synchronous Boost Operation datasheet (Rev. B) 30 Dec 2016
Application note USB D+/D- Input Current Limit Detection 30 Dec 2020
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Technical article Learn the basics of battery charging in power banks 04 May 2016
Technical article Should I use a linear charger or a switching charger? 31 Oct 2015
Technical article Eliminate battery anxiety with portable power in your pocket 05 Sep 2015
Analog Design Journal Extract maximum power from the supply when charging a battery 11 Apr 2014
EVM User's guide bq24295EVM-549 (PWR549) User's Guide (Rev. B) 03 Apr 2014

Design & development

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

Evaluation board

BQ24295EVM-549 — I2C Controlled 3A Single Cell Charger with Adjustable Voltage and 1.5A OTG Evaluation Module

I2C Controlled 2.5A Single Cell Charger with Narrow VDC Power Path Management and USB OTG, 5V and 1.5 ADC maximum

The BQ24295EVM requires USB Interface Adaptive Evaluation Module “USB-TO-GPIO” for I2C interface. If one is not already available to you and I2C is needed then one can be (...)

Not available on TI.com
Application software & framework

TI-CHARGER-GUI — GUI software for use with USB2ANY & battery charging evaluation modules

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.
Support software

bq24295, 96, 97 V0003 Setup Software

SLUC495.ZIP (539 KB)
Package Pins Download
VQFN (RGE) 24 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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