I2C controlled 6A three-level switch mode single-cell charger

23rd August 2018
Enaie Azambuja

Texas Instruments' BQ25910 is an integrated three-level switch-mode parallel battery charge management device for single cell Li-ion and Li-polymer batteries. Utilisation of the three-level converter maintains highest switch-mode operation efficiency while reducing solution footprint and increasing power density. The device supports fast charging with high input voltage for a wide range of portable devices.

The solution integrates reverse-blocking FET (QBLK), and four switching FETs (QHSA, QHSB, QLSB, QLSA). The I2C serial interface with charging and system settings makes the device a truly flexible solution.


  • Parallel Charger Operation Provides Fast Charging in Dual Charger Configuration
  • High Efficiency 750kHz Switch Mode Three-Level Buck Parallel Charger
  • Reduced Ripple to Support Low Profile Inductor
  • 95.4% Charge Efficiency at 1.5A from 5V Input
  • 93.3% Charge Efficiency at 3A from 9V Input
  • Superior Efficiency Compared to Traditional Buck Converter in Compact Form Factor
  • Single Input to Support USB Input and Adjustable High Voltage Adapters
  • Support 3.9V to 14V Input Voltage Range with 20V Absolute Maximum Input Voltage Rating
  • Input Current Limit (500mA to 3.6A with 100mA resolution) to Support USB2.0 and USB 3.0 Standard and High Voltage Adaptors
  • Maximum Power Tracking by Input Voltage Limit (VINDPM) up to 14V
  • Flexible I2C Mode for Optimal System Performance
  • High Integration Includes all MOSFETs, Current Sensing and Loop Compensation
  • Lossless Charge Current Sensing without Sense Resistor
  • < 10µA Low Battery Leakage Current During Stand-By Mode
  • High Accuracy
  • ±0.4% Charge Voltage Regulation
  • ±10% Charge Current Regulation
  • ±7.5% Input Current Regulation
  • Remote Differential Battery Sensing
  • Safety
  • Thermal Regulation and Thermal Shutdown
  • Input UVLO and Overvoltage Protection
  • Battery OVP
  • Input Dynamic Power Management (DPM)
  • Charging Safety Timer
  • Flying Capacitor Short Circuit Protection
  • Output Voltage Short Circuit Protection
  • Available in 36-Ball WCSP Package

Discover more here.

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