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Texas Instruments bq27427 Battery Fuel Gauge

Texas Instruments bq27427 Battery Fuel Gauge is a single-cell gauge that requires minimal system microcontroller firmware development and user configuration, leading to quick system bring-up. Three chemistry profiles are preprogrammed to enable minimum user configuration and to help manage customer inventory across projects with different battery chemistries. The bq27427 battery fuel gauge has a very low sleep power consumption leading to a longer battery run time. Configurable interrupts help free up the host from continuous polling and save system power. Accurate temperature sensing is supported via an external thermistor.

The Texas Instruments bq27427 battery fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging and provides information such as state-of-charge (%), remaining battery capacity (mAh), and battery voltage (mV). Battery fuel gauging with the bq27427 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for and embedded battery circuit or a removable battery pack. The tiny, 9-ball, 1.62mm x 1.58mm, 0.5mm pitch NanoFree™ chip scale package (DSBGA) is ideal for space-constrained applications.

Features

  • Single-cell Li-ion battery fuel gauge
    • Resides on system board
    • Supports embedded or removable batteries
    • Powers directly from the battery with integrated LDO
    • Integrates low-value sense resistor (7mΩ)
  • Battery fuel gauging based on patented Impedance Track™ technology
    • Provides three selectable preprogrammed profiles for 4.2V, 4.35V, and 4.4V cells
    • Reports remaining capacity and state-of-charge (SOC) with smoothing filter
    • Adjusts automatically for self-discharge, battery aging, temperature, and rate changes
    • Estimates battery state-of-health (aging)
  • Ultra-low power consumption in NORMAL (50µA) and SLEEP (9µA) modes
  • Microcontroller peripheral interface supports
    • 400kHz I2C serial interface
    • Configurable SOC interrupt or battery low digital output warning
    • Internal temperature sensor or host reported temperature or external thermistor

Applications

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

Functional Block Diagram

Texas Instruments bq27427 Battery Fuel Gauge

Related Development Tool

Texas Instruments bq27427EVM Evaluation Module (EVM)

A complete evaluation system for the bq27427, a gas gauge IC.

Learn Moreabout Texas Instruments bq27427EVM Evaluation Module (EVM) View Productsrelated to Texas Instruments bq27427EVM Evaluation Module (EVM)
Published: 2023-02-10 | Updated: 2023-02-24