BQ24250C数据手册集成电路（IC）的电池充电器规格书PDF

描述 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.

特性 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)
• VIN_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 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
• Robust Battery Detection Algorithm
• Charge Time Optimizer for improved charge times at any given charge current
• 2.4 × 2.0 mm 30-ball WCSP Packages