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BQ27505-J4
  • BQ27505-J4

BQ27505-J4

ACTIVE

System-side Impedance Track™; fuel gauge with FW v2.24

Texas Instruments BQ27505-J4 Product Info

1 April 2026 1

Parameters

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

Rating

Catalog

Package

DSBGA (YZG)-12-3.9375 mm² 2.25 x 1.75

Features

  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Resides on System Main Board
    • Works With Embedded or Removable Battery Packs
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for Battery Temperature Reporting
    • Battery Low Interrupt Warning
    • Battery Insertion Indicator
    • Configurable Level of State of Charge (SOC) Interrupts
    • State of Health Indicator
    • 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)
  • 400-kHz I2C Interface for Connection to System Microcontroller Port
  • In a 12-Pin NanoFree (CSP) Packaging
  • APPLICATIONS
    • Smartphones and PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players
  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Resides on System Main Board
    • Works With Embedded or Removable Battery Packs
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for Battery Temperature Reporting
    • Battery Low Interrupt Warning
    • Battery Insertion Indicator
    • Configurable Level of State of Charge (SOC) Interrupts
    • State of Health Indicator
    • 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)
  • 400-kHz I2C Interface for Connection to System Microcontroller Port
  • In a 12-Pin NanoFree (CSP) Packaging
  • APPLICATIONS
    • Smartphones and PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players

Description

The Texas Instruments bq27505-J4 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 micro-controller firmware development. The bq27505-J4 resides on the system’s main board and manages an embedded battery (nonremovable) or a removable battery pack.

The bq27505-J4 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), temperature (°C) and state of health(%).

Battery fuel gauging with the bq27505-J4 requires only PACK+ (P+), PACK– (P–), and Thermistor (T) connections to a removable battery pack or embedded battery circuit. The CSP option is a 12-ball package in the dimensions of 2.43mm × 1.96mm with 0.5mm lead pitch. It is ideal for space constrained applications.

The Texas Instruments bq27505-J4 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 micro-controller firmware development. The bq27505-J4 resides on the system’s main board and manages an embedded battery (nonremovable) or a removable battery pack.

The bq27505-J4 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), temperature (°C) and state of health(%).

Battery fuel gauging with the bq27505-J4 requires only PACK+ (P+), PACK– (P–), and Thermistor (T) connections to a removable battery pack or embedded battery circuit. The CSP option is a 12-ball package in the dimensions of 2.43mm × 1.96mm with 0.5mm lead pitch. It is ideal for space constrained applications.

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