Texas Instruments BQ25040 Li-Ion Battery Charger

The new bq25040, from Texas Instruments Incorporated (TI), is an integrated Li-ion linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC adapter and charges a single cell Li-Ion battery with up to 1.1A of charge current. The bq25040 measures 2 mm x 3 mm and can regulate voltage within one-percent accuracy from a USB port or AC adapter. The device’s integrated LDO allows a mobile application to power up instantly from an external power source, even with an empty or absent battery. The bq25040 is available now in a 10-pin, QFN package and is priced at $1.20 in quantities of 1,000.

TI bq25040 Battery Charger Features

  • 30V Input Rating, with Overvoltage Protection (OVP)
  • Up to 1.1-A Charge Rate
  • 50mA Integrated Low Dropout Linear Regulator (LDO)
  • 4.2V at 2.3A Production Test Mode
  • Single-Input Interface Selects USB 100mA, 500mA or User-Programmable Maximum Input Current Limit
  • Input Voltage Dynamic Power Management
  • 1% Charge Voltage Regulation Accuracy
  • 10% Charge Current Accuracy
  • Thermal Regulation and Thermal Shutdown Protection for Output Current Control
  • Soft-Start Feature to Reduce Inrush Current
  • Status Indication – Power Good and Charging/Done
  • Available in Small 2mm × 3mm DFN-10 Package
Texas Instruments Incorporated (TI) BQ25040 1.1A, Single-Input, Single Cell Li-Ion Battery Charger With 50mA LDO in 2x3 QFN

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