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Texas Instruments bq27320 Single-Cell Battery Fuel Gauge

Texas Instruments bq27320 Single-Cell Battery Fuel Gauge requires very minimal configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27320 uses a Compensated End-of-Discharge Voltage (CEDV) gas gauging algorithm for fuel gauging. This provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C), and state-of-health (%). Configurable interrupts on the Texas Instruments bq27320 help save system power and free the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.

Features

  • Battery fuel gauge for system-/pack-side configuration
  • Compensated End-of-Discharge Voltage (CEDV) gauging technology
    • Adjusts for battery aging, self-discharge, temperature, and rate changes
    • Reports remaining capacity, State-of-Charge (SOC), and time-to-empty with smoothing filter
    • Battery state-of-health estimation
    • Supports embedded or removable packs from 100mAhr to 14,500mAhr capacity
    • Accommodates pack swapping with up to four separate battery profiles
    • Supports a raw coulomb counter to provide delta capacity information
  • Microcontroller peripheral supports
    • SDQ communication interface for authentication ID
    • 400kHz I2C™ serial interface for high-speed communication
    • 32 bytes of scratch-pad Flash NVM
    • Battery low digital output warning
    • Configurable SOC interrupts
    • External thermistor, internal sensor, or host reported temperature options
  • 15-pin 1.375mm × 2.75mm × 1.7 mm pitch NanoFree™ (DSBGA) package

Applications

  • Smartphones, feature phones, and tablets
  • Wearables
  • Building automation
  • Portable medical/industrial handsets
  • Portable audio
  • Gaming

Simplified Schematic

Schematic - Texas Instruments bq27320 Single-Cell Battery Fuel Gauge

Related Development Tool

Texas Instruments bq27320EVM-766 Evaluation Module (EVM)

Complete evaluation system for the bq27220, a single-cell pack/system-side battery gas gauge.

Learn Moreabout Texas Instruments bq27320EVM-766 Evaluation Module (EVM) View Productsrelated to Texas Instruments bq27320EVM-766 Evaluation Module (EVM)
Published: 2016-05-23 | Updated: 2022-03-11