BQ4050 1-4 Series CEDV Battery Fuel (Gas) Gauge | TI.com

BQ4050 (ACTIVE)

1-4 Series CEDV Battery Fuel (Gas) Gauge

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

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 gauges

 
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-R1 BQ40Z50-R2 BQ78Z100
2-4 Cells
Single Cell    
Single Cell     Single Cell     1-2 Cells     2-4 Cells
Single Cell    
2-4 Cells
Single Cell    
1-2 Cells    
Li-Ion/Li-Polymer
LiFePO4    
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     32000     14000     14000     29000     29000     14000    
SMBus     HDQ
I2C    
I2C     I2C     SMBus     SMBus     HDQ    
500     100     100     100     100     500     100    
LED     None     None     None     LED     LED     None    
Pack     Pack     Pack     Pack     Pack     Pack     Pack    
CEDV     Impedance Track     Impedance Track     Impedance Track     Impedance Track     Impedance Track     Impedance Track    
External
Internal    
N/A     N/A     External
Internal    
External
Internal    
External
Internal    
External
Internal    
Cell Balancing
Integrated Protector
SHA-1 Authentication    
SHA-1 Authentication     Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication    
Battery Management Unit
Cell Balancing
Integrated Protector
SHA-1 Authentication    
Cell Balancing
Integrated Protector
SHA-1 Authentication
Turbo Mode    
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