BQ24251RGER Power Path Management IC Battery Management 2A Sgl Inp I2C/SA Sw Mode LiIon Batt Chrg

1 Features

• High-Efficiency Switched-Mode Charger With Separate Power Path

• Startup System From Deeply Discharged or Missing Battery

• USB Charging Compliant

– Selectable Input Current Limit of 100 mA, 500 mA, 900 mA, 1.5 A, and 2 A

• BC1.2 Compatible D+, D– Detection

• In Host Mode (After I2C Communication Starts and Before Watchdog Timer Times Out)

  • – Programmable Battery Charge Voltage, VBATREG

  • – Programmable Charge Current (ICHG)

  • – Programmable Input Current Limit (ILIM)

  • – Programmable Input Voltage-Based Dynamic Power Management Threshold, (VIN_DPM)

  • – Programmable Input Overvoltage Protection Threshold (VOVP)

  • – Programmable Safety Timer

• Resistor Programmable Defaults for:

  • – ICHG up to 2 A With Current Monitoring Output (ISET)

  • – ILIM up to 2 A With Current Monitoring Output (ILIM)

  • – VIN_DPM (VDPM)

• Watchdog Timer 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

  • – Thermal Shutdown

  • – Voltage-Based, JEITA Compatible NTC Monitoring Input

  • – Safety Timer

• 22 V Absolute Maximum Input Voltage Rating

• 10.5 V Maximum Operating Input Voltage

• Low RDS(on) Integrated Power FETs for a Charging Rate of up to 2 A

• Open-Drain Status Outputs

• Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz for Small Inductor Support

• AnyBoot Robust Battery Detection Algorithm

• Charge Time Optimizer for Improved Charge Times at Any Given Charge Current

• 2.40-mm x 2.00-mm 30-Ball DSBGA and 4-mm x 4-mm 24-Pin QFN Packages

2 Applications

• Mobile Phones and Smart Phones • MP3 Players
• Portable Media Players
• Handheld Devices

3 Description

The bq24250, bq24251, and bq24253 are highly integrated single-cell Li-Ion battery chargers and system power-path management devices 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 an AC wall adapter for a versatile solution.

Device Information