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BQ27426 Datasheet System-side Impedance Track Fuel Gauge

Manufacturer: Texas Instruments

Overview: BQ27426 SLUSC91G – OCTOBER 2015 – REVISED APRIL 2023 BQ27426 System-Side Impedance Track™ Fuel Gauge.

General Description

The Texas Instruments BQ27426 battery fuel gauge is a single-cell gauge that requires minimal userconfiguration and system microcontroller firmware development, 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 BQ27426 battery fuel gauge has very low sleep power consumption leading to longer battery run time.

Key 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.
  • Supports a low-value external sense resistor (10 mΩ).
  • Ultra low 9 μA operating current when the load is below 10 mA, set by Sleep Current threshold.
  • Battery fuel gauging based on patented Impedance Track™ technology.
  • Provides three selectable preprogrammed profiles.

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