BQ24257 - Texas Instruments

BQ24257 Li-Ion/LiFePO4 Battery Charger

The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for r.

Features

• High-efficiency Switch-mode Charger with Integrated Current Sense Resistor
• BC1.2 D+, D
  – Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USBPHI
• USB Charging Compliant
• Selectable Input Current Limit of 100 mA, 150 mA, 500 mA, 900 mA. 1.5 A, and 2 A
• Watchdog Timer with Disable Bit
• Integrated 4.9-V, 50-mA LDO
• Complete System Level Protection
  – Input UVLO, Input Overvoltage Protection (OVP), Battery OVP, Sleep Mode, VIN_DPM
  – Input Current Limit
  – Charge Current Limit
  – Thermal Regulation and Thermal Shutdown
  – Voltage Based, JEITA Compatible NTC Monitoring Input.