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, V_BATREG
  • Programmable Charge Current (I_CHG)
  • Programmable Input Current Limit (I_LIM)
  • Programmable Input Voltage Based Dynamic Power Management threshold, (V_{IN_DPM})
  • Programmable Input Overvoltage Protection Threshold (V_OVP)
  • Programmable Safety Timer
• Resistor Programmable Defaults for:
  • I_CHG up to 2 A with Current Monitoring Output (ISET)
  • I_LIM up to 2 A with Current Monitoring Output (ILIM)
  • V_{IN_DPM} (VDPM)
• Watchdog Timer Disable Bit
• 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 R_DS(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.

Typical Application

4 Revision History