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BQ27546-G1
  • BQ27546-G1

BQ27546-G1

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Single cell Impedance Track™ pack side fuel gauge with DSBGA package Linux Mainline Status

Texas Instruments BQ27546-G1 Product Info

1 April 2026 3

Parameters

Cell chemistry

Li-Ion/Li-Polymer

Number of series cells

Single Cell

Communication interface

HDQ, I2C

Battery capacity (min) (mAh)

100

Battery capacity (max) (mAh)

32000

Implementation

Pack

External capacity indication

None

Features

Impedance Track™ algorithm, SHA-1 Authentication

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Package

DSBGA (YZF)-15-4.8125 mm² 1.75 x 2.75

Features

  • Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • Internal or External Temperature Sensor for Battery Temperature Reporting
    • SHA-1/HMAC Authentication
    • Lifetime Data Logging
    • 64 Bytes of Non-Volatile Scratch Pad FLASH
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Models 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 (5 mΩ to 20 mΩ)
  • Advanced Fuel Gauging Features
    • Internal Short Detection
    • Tab Disconnection Detection
  • HDQ and I2C™ Interface Formats for Communication with Host System
  • Small 15-Ball Nano-Free™ (DSBGA) Packaging
  • Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • Internal or External Temperature Sensor for Battery Temperature Reporting
    • SHA-1/HMAC Authentication
    • Lifetime Data Logging
    • 64 Bytes of Non-Volatile Scratch Pad FLASH
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Models 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 (5 mΩ to 20 mΩ)
  • Advanced Fuel Gauging Features
    • Internal Short Detection
    • Tab Disconnection Detection
  • HDQ and I2C™ Interface Formats for Communication with Host System
  • Small 15-Ball Nano-Free™ (DSBGA) Packaging

Description

The bq27546-G1 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires minimal system microcontroller firmware development for accurate battery fuel gauging. The bq27546-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non-removable).

The bq27546-G1 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). It also provides detections for internal short or tab disconnection events.

The bq27546-G1 features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

The device comes in a 15-ball Nano-Free™ DSBGA package (2.61 mm × 1.96 mm) that is ideal for space-constrained applications.

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