Product
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BQ4050
  • BQ4050

BQ4050

ACTIVE

1-4 series CEDV battery fuel (gas) gauge

Texas Instruments BQ4050 Product Info

1 April 2026 3

Parameters

Cell chemistry

Li-Ion/Li-Polymer, LiFePO4

Number of series cells

2-4 Cells, Single Cell

Communication interface

SMBus

Battery capacity (min) (mAh)

500

Battery capacity (max) (mAh)

65000

Implementation

Pack

External capacity indication

LED

Features

CEDV algorithm, Cell balancing, Integrated Protector, SHA-1 Authentication

Operating temperature range (°C)

-40 to 85

Cell balancing

Internal

Rating

Catalog

Package

VQFN (RSM)-32-16 mm² 4 x 4

Features

  • High-Side Protection N-CH FET Drive Enables Serial Bus Communication During Fault Conditions
  • Cell Balancing with Internal Bypass Optimizes Battery Health
  • Diagnostic Lifetime Data Monitor and Black Box Recorder for Failure Analysis
  • Full Array of Programmable Protection Features: Voltage, Current, Temperature
  • JEITA Charge Algorithms Support Smart Charging
  • Analog Front End with Two Independent ADCs
    • Simultaneous Current and Voltage Sampling
    • High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
  • Supports Battery Trip Point (BTP) Function for Windows® Integration
  • LED Display for State of Charge and Battery Status Indication
  • 100-KHz SMBus v1.1 Communications Interface for Programming and Data Access with Alternate 400-KHz Mode
  • SHA-1 Authentication Responder for Increased Battery Pack Security
  • Compact 32-Pin VQFN Package (RSM)
  • High-Side Protection N-CH FET Drive Enables Serial Bus Communication During Fault Conditions
  • Cell Balancing with Internal Bypass Optimizes Battery Health
  • Diagnostic Lifetime Data Monitor and Black Box Recorder for Failure Analysis
  • Full Array of Programmable Protection Features: Voltage, Current, Temperature
  • JEITA Charge Algorithms Support Smart Charging
  • Analog Front End with Two Independent ADCs
    • Simultaneous Current and Voltage Sampling
    • High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
  • Supports Battery Trip Point (BTP) Function for Windows® Integration
  • LED Display for State of Charge and Battery Status Indication
  • 100-KHz SMBus v1.1 Communications Interface for Programming and Data Access with Alternate 400-KHz Mode
  • SHA-1 Authentication Responder for Increased Battery Pack Security
  • Compact 32-Pin VQFN Package (RSM)

Description

The Texas Instruments bq4050 device, incorporating Compensated End-of-Discharge Voltage (CEDV) technology, is a highly integrated, accurate, 1-series to 4-series cell gas gauge and protection solution, enabling autonomous charger control and cell balancing.

The bq4050 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for Li-Ion and Li-Polymer battery packs.

The bq4050 gas gauge communicates via an SMBus-compatible interface and combines an ultra-low power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-CH FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

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