The Texas Instruments bq27500/01 system-side Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development. The bq27500/01 resides on the system main board, and manages an embedded battery (non-removable) or a removable battery pack.

The bq27500/01 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (min.), battery voltage (mV), and temperature (°C).

Battery fuel gauging with the bq27500 requires only PACK+ (P+), PACK– (P–), and Thermistor (T) connections to a removable battery pack or embedded battery. The bq27501 works with identification resistors in battery packs to gauge batteries of different fundamental chemistries and/or significantly different rated capacities.

• Battery Fuel Gauge for 1-Series Li-Ion Applications
• Resides on System Main Board
  • Works With Embedded or Removable Battery Packs
• Two Varieties
  • bq27500: Uses PACK+, PACK–, and T Battery Terminals
  • bq27501: Works With Battery ID Resistor in Battery Pack
• Microcontroller Peripheral Provides:
  • Accurate Battery Fuel Gauging
  • Internal Temperature Sensor for System Temperature Reporting
  • Battery Low Interrupt Warning
  • Battery Insertion Indicator
  • Battery ID Detection
  • 96 Bytes of Non-Volatile Scratch-Pad FLASH
• Battery Fuel Gauge Based on Patented Impedance Track? Technology
  • Models the Battery Discharge Curve for Accurate Time-to-Empty Predictions
  • Automatically Adjusts for Battery Aging, Battery Self-Discharge, and Temperature/Rate Inefficiencies
  • Low-Value Sense Resistor (10 m or Less)
• I2C? Interface for Connection to System Microcontroller Port
• 12-Pin 2,5-mm × 4-mm SON Package
• APPLICATIONS
  • Smartphones
  • PDAs
  • Digital Still and Video Cameras
  • Handheld Terminals
  • MP3 or Multimedia Players

Impedance Track is a trademark of Texas Instruments. I2C is a trademark of Philips Electronics.

• Cell chemistry
• Li-Ion/Li-Polymer
• Number of series cells
• Single Cell
• Communication interface
• I2C
• Battery capacity (Min) (mAh)
• 300
• Battery capacity (Max) (mAh)
• 8000
• Implementation
• System
• External capacity indication
• None
• Features
• Impedance Track? algorithm
• Operating temperature range (C)
• -40 to 85
• Cell balancing
• —

BQ27500的完整型号有：BQ27500DRZR、BQ27500DRZT，以下是这些产品的关键参数及官网采购报价：

BQ27500DRZR，工作温度：-40 to 85，封装：SON (DRZ)-12，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ27500DRZR的批量USD价格：3.928（1000+）

BQ27500DRZT，工作温度：-40 to 85，封装：SON (DRZ)-12，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ27500DRZT的批量USD价格：4.582（1000+）

BQ27XXXSW-LINUX — 用于 BQ27XXX 的 Linux 驱动程序

The Linux driver supports the BQ27x series of Battery Fuel Gauges. The Linux driver supports communication through the I2C/HDQ bus and interfaces with the power supply sub-system to monitor battery properties.

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

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