Power Electronics
Image courtesy of Texas Instrumnets

(Image courtesy of Texas Instrumnets).

MaxCharge™ Technology Cuts Battery-Charge Time By 60 Percent

Enabling faster and cooler charging, Texas Instruments has introduced the industry's first fully integrated 5-A single-cell lithium-ion (Li-ion) battery-charger circuit with proprietary MaxCharge technology, which reduces charge time up to 60 percent compared to existing battery chargers. The bq25892 switch-mode charger gives users a safe charging experience while maximizing the benefits of a fast charge time. 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 high-efficiency charger, which charges at 3.5A with minimal 18 °C temperature rise, facilitates a faster and cooler operation by combining narrow-voltage DC/DC power path management with TI's MaxCharge technology to support input voltages up to 14V while providing charge current up to 5A.

Features and benefits:

  • Fast charging by supporting high-input voltages: The industry's first single-cell Li-ion battery charger to support 5A of current and input voltages up to 14V.
  • Highest efficiency: Provides up to 91 percent charging efficiency at 9Vin 3.5A with only an 18 °C temperature rise.
  • Safer charging: Designers reduced 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 9A supplement current for an instant system-power burst.
  • Simple design integration: Pin-to-pin compatibility with TI's bq24192 product family.

This fast-charging battery charger is designed to work in single-cell portable devices with TI battery fuel gauges. For example, pair a TI MaxCharge technology device with TI MaxLife™ battery fuel gauge technology to ensure longer battery life and safer charging of portable electronics.

The I2C-controlled 1S, 5-A fast charger is featured in a new TI Designs reference design, TIDA-00538, utilizing MaxCharge technology for high input voltage and adjustable USB OTG boost, which enables turn-key access to reduce battery-charging time and improve battery run time during the discharging phase.

The bq25892 charger is shipping in volume production and available through the TI Store and the company's authorized distribution network. The products come in a 4-mm by 4-mm, 24-pin quad flat no-lead (QFN) package. The bq25890 and bq25892, for smartphones and tablets, is priced at US$2.50 in 1,000-unit quantities. In addition, TI introduced its new bq25895, which supports power banks and is priced at US$2.00.

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