BQ27010

单节锂电池和锂聚合物电池电量监测计 IC

The bqJUNIOR™ series are highly accurate stand-alone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting devices targeted at space-limited, portable applications. The IC monitors a voltage drop across a small current sense resistor connected in series with the battery to determine charge and discharge activity of the battery. Compensations for battery age, temperature, self-discharge, and discharge rate are applied to the capacity measurments to provide available time-to-empty information across a wide range of operating conditions. Battery capacity is automatically recalibrated, or learned, in the course of a discharge cycle from full to empty. Internal registers include current, capacity, time-to-empty, state-of-charge, cell temperature and voltage, status, and more.

The bqJUNIOR can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a HDQ one-wire or I2C serial interface.

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HDQ bq27010 or I2C bq27210 Communication

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Reports Accurate _Time-to-Empty_ At Both Measured and Host-Requested Load Values

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Reports Available Capacity Compensated for Discharge Rate, Temperature, and Age

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End-of-Discharge Voltage Compensated for Discharge Rate and Temperature

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Automatic Capacity Reduction with Age

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Reports Temperature, Voltage, and Current

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High Accuracy Charge and Discharge Current Integration with Automatic Offset Calibration

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Requires No User Calibration

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Programmable Input/Output Port

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Internal User EEPROM Configuration Memory

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Uploadable Coefficients Allows Host-Side Use with Multiple Pack Characteristics

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Stable Oscillator Without External Components

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Dynamic End-of-Discharge Detection Delay to Allow Use in a High-Dynamic Load Environment

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Automatic Sleep Mode When Communication Lines are Low

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Available in a Small 3 mm x 4 mm QFN Package

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Five Low-Power Operating Modes

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Active: < 90 µA

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Sleep: < 2.5 µA

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Ship: < 2 µA bq27010 only

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Hibernate: < 1.5 µA

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Data Retention: < 20 nA

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APPLICA ONS

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PDA

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Smart Phones

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MP3 Players

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Digital Cameras

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Internet Appliances

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Handheld Devices

bqJUNIOR is a trademark of Texas Instruments.