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BQ24075中文资料

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BQ24075中文资料

BQ24075中文资料

bq24072,bq24073bq24074,bq24075

http://www.wendangku.net/doc/e89850d0d15abe23482f4d25.html ......................................................................................................................................SLUS810A–SEPTEMBER 2008–REVISED DECEMBER 2008

1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

Fully Compliant USB Charger

–Selectable 100mA and 500mA Maximum Input Current

The bq2407x series of devices are integrated Li-ion linear chargers and system power path management –100mA Maximum Current Limit Ensures devices targeted at space-limited portable Compliance to USB-IF Standard

applications.The devices operate from either a USB –Input based Dynamic Power Management port or AC adapter and support charge currents up to (V IN -DPM)for Protection Against Poor USB 1.5A.The input voltage range with input overvoltage Sources

protection supports unregulated adapters.The USB •28V Input Rating with Overvoltage Protection input current limit accuracy and start up sequence allow the bq2407x to meet USB-IF inrush current •

Integrated Dynamic Power Path Management specification.Additionally,the input dynamic power (DPPM)Function Simultaneously and management (V IN -DPM)prevents the charger from Independently Powers the System and crashing incorrectly configured USB sources.Charges the Battery

The bq2407x features dynamic power path •Supports up to 1.5A Charge Current with management (DPPM)that powers the system while Current Monitoring Output (ISET)

simultaneously and independently charging the •Programmable Input Current Limit up to 1.5A battery.The DPPM circuit reduces the charge current for Wall Adapters

when the input current limit causes the system output to fall to the DPPM threshold;thus,supplying the •System Output Tracks Battery Voltage system load at all times while monitoring the charge (bq24072)

current separately.This feature reduces the number •Programmable Termination Current (bq24074)of charge and discharge cycles on the battery,allows •Battery Disconnect Function with SYSOFF for proper charge termination and enables the system Input (bq24075)

to run with a defective or absent battery pack.

•Programmable Pre-Charge and Fast-Charge Typical Application Circuit

Safety Timers

•Reverse Current,Short-Circuit and Thermal Protection

•NTC Thermistor Input

•Proprietary Start Up Sequence Limits Inrush Current

•Status Indication –Charging/Done,Power Good

Small 3mm ×3mm 16Lead QFN Package

•Smart Phones

•Portable Media Players

•Portable Navigation Devices •

Low-Power Handheld Devices

Please be aware that an important notice concerning availability,standard warranty,and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.Copyright ©2008,Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas Instruments standard warranty.Production processing does not necessarily include testing of all parameters.

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