BQ24250CYFFR Power Path Management IC Battery Management Battery Charger

1 Features

• High-efficiency Switch-mode Charger with Separate Power Path

• Start up 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

• 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)

• Integrated 4.9 V, 50 mA LDO

• Complete System Level Protection

  • – Input UVLO, Input Over-voltage Protection (OVP), Battery OVP, Sleep Mode, VIN_DPM

  • – Input Current Limit

  • – Charge Current Limit

  • – Thermal Regulation

  • – Thermal Shutdown

  • – Voltage Based NTC Monitoring Input

  • – Safety Timer

• 20 V Maximum Input Voltage Rating

• 10.5 V Maximum Operating Input Voltage

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

• Open Drain Status Outputs

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

• AnyBoot Robust Battery Detection Algorithm
• Charge Time Optimizer for improved charge times

at any given charge current
• 2.4 x 2.0 mm 30-ball WCSP Packages

2 Applications

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

3 Description

The bq24250C is a highly integrated single-cell Li-Ion battery charger and system power-path management device 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.