1-4 Series CEDV Battery Fuel (Gas) Gauge - BQ4050

BQ4050 (ACTIVE)

1-4 Series CEDV Battery Fuel (Gas) Gauge

 

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.

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)

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Parametrics Compare all products in Battery Fuel Gauge

 
Number of Series Cells
Cell Chemistry
Battery Capacity (Max) (mAh)
Communication Interface
Battery Capacity (Min) (mAh)
External Capacity Indication
Implementation
Gas Gauge Algorithm
Cell Balancing
Features
Operating Temperature Range (C)
Pin/Package
BQ4050 BQ27542-G1 BQ27750 BQ28Z610 BQ40Z50-R2 BQ40Z60 BQ78Z100
2-4 Cells
Single Cell   
Single Cell    Single Cell    1-2 Cells    2-4 Cells
Single Cell   
2-4 Cells    1-2 Cells   
Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer    Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer   
29000    14600    14000    14000    29000    29000    14000   
SMBus    HDQ
I2C   
I2C    I2C    SMBus    SMBus    HDQ   
500    100    100    100    500    100    100   
LED    None    None    None    LED    LED    None   
Pack    Pack    Pack    Pack    Pack    Pack
System   
Pack   
CEDV    IT (High accuracy)    IT (High accuracy)    IT (High accuracy)    IT (High accuracy)    IT (High accuracy)    IT (High accuracy)   
External
Internal   
N/A    N/A    External
Internal   
External
Internal   
External
Internal   
External
Internal   
Cell Balancing
Integrated Protector
SHA-1 Authentication   
SHA-1 Authentication
Turbo Mode   
Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication   
Battery Management Unit
Cell Balancing
Integrated Protector
SHA-1 Authentication   
Integrated Protector
SHA-1 Authentication
Turbo Mode   
Battery Management Unit
Cell Balancing
Integrated Protector
SHA-1 Authentication
Turbo Mode   
Cell Balancing
Integrated Protector
SHA-1 Authentication   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
32VQFN    12SON    12SON    12SON    32VQFN    32VQFN    12SON