Single-cell 5-A battery-charger IC cuts battery-charge times 60 percent

May 05, 2015 // By Paul Buckley
Texas Instruments is claiming the industry's first fully integrated 5-A single-cell lithium-ion (Li-ion) battery-charger circuit with proprietary MaxCharge technology that reduces charge time up to 60 percent compared to existing battery chargers.

The bq25892 switch-mode charger gives users a safer charging experience while still maximizing the benefits of a faster charge time, currently unseen in the industry. MaxCharge technology provides faster charge times and cooler charging to improve user experience and extend the overall life of electronics in many Li-ion applications, including smartphones, tablets, drones, power banks, and industrial and medical equipment.

The highly efficient charger, which charges at 3.5 A with minimal 18oC temperature rise, facilitates faster and cooler charging by combining narrow-voltage DC/DC power path management with TI's MaxCharge technology to support input voltages up to 14 V while providing charge current up to 5 A.

Features and benefits:

  • Fastest charging by supporting high-input voltages: The industry's first single-cell Li-ion battery charger to support 5 A of current and input voltages up to 14 V.
  • Highest efficiency: Provides up to 91 percent charging efficiency at 9 Vin 3.5 A with only an 18oC temperature rise.
  • Safer charging: Designers reduce excess heat by controlling the integrated circuit temperature and optimize thermal performance with a thermal-regulation loop.
  • High battery supplement current: The charger can provide peak 9 A supplement current for an instant system-power burst.