Texas Instruments Incorporated (TI)recently introduced lithium-ion battery charger integrated circuits (ICs) that reduce charge time by 50 percent in smartphones and tablets compared to other charger solutions. The bq2419x family of 4.5-A output, 20-V input-rated switch-mode chargers with I2C interface and USB On-the-Go (OTG) support delivers faster and cooler charging to a wide array of applications ranging from power banks and packs to 4G LTE routers, Wi-Fi speakers, portable medical and industrial designs. The bq2419x battery chargers for single-cell Li-Ion batteries is available now in a 24-pin, 4-mm x 4-mm QFN package, priced at US$2.50 in quantities of 1,000. Designers can order the bq2419xEVM through TI's eStore.

TI bq24190

Key features and benefits of the bq2419x:

  • Faster charging for single-cell lithium battery packs: 4.5-A output, 20-V input chargers cut charge time in half with unique battery path impedance compensation.
  • Cooler charging with highest efficiency: 4.5-A switch-mode charger achieves 92-percent efficiency at 2 A and up to 90-percent efficiency at 4 A of output current. Meets Energy Star and European Union charging specifications. Programmable thermal regulation temperature significantly improves system-level design.
  • Longer battery run-time: Integrated battery discharge MOSFET provides the industry's lowest on-resistance of 12 milliohms.
  • Highest efficiency for USB OTG: 92-percent boost efficiency at 2.1 amps with the bq24195.
  • Safe charging: Prevents overvoltage, protects the battery and system during charging. bq24193 supports JEITA guidelines.
  • Simple to design: Smallest, most integrated battery charging solution (4-mm x 4-mm QFN package) integrates Power Path management, synchronous FETs, integrated current sensing, internal loop compensation and bootstrap diode.