BQ26500中文资料适用于一节和两节锂离子电池应用的完整电池电量监测计数据手册TI规格书

描述 Description

The bq26500, the first in the bqJUNIOR™ family of advanced gas gauge device for handheld applications, is a highly accurate standalone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting device targeted at space limited portable applications. The device 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 temperature, self-discharge, and rate of discharge are applied to the charge counter to provide available capacity 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 available capacity, cell temperature and voltage, state-of-charge, and status and control registers. The bq26500 can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s HDQ bus interface reduces communication overhead in the external microcontroller.

特性 Features

• Reports Accurate State-of-Charge in Li-Ion and Li-Pol Cells, No System Processor Calculations Needed
• Reports Cell Temperature and Voltage
• High-Accuracy Coulometric Charge and Discharge Current Integration with Automatic Offset Cancellation
• Requires No Offset Calibration
• Programmable Input/Output Port
• Internal Time-Base Eliminates External Crystal Oscillator
• Four Automatic Low-Power Operating Modes
• Active:
• Small 8-Pin TSSOP Package
• APPLICATIONS
• PDAs
• Smart Phones
• MP3 Players
• Digital Cameras
• Internet Appliances
• Handheld Devices