BQ24251YFFR.A中文资料德州仪器数据手册PDF规格书

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:

– I CHG 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.