BQ28Z610 (ACTIVE)

Battery Fuel Gauge with Integrated Protector for 1-2 Series Packs

 

Description

The Texas Instruments bq28z610 device is a highly integrated, accurate, 1-series to 2-series cell gas gauge and protection solution, enabling autonomous charger control and cell balancing.

The bq28z610 device enables autonomous charge control through Master Mode I2C broadcasts of charging current and voltage information, eliminating software overhead that is typically incurred by the system’s host controller.

The bq28z610 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1- to 2-series cell Li-Ion and Li-Polymer battery packs.

The bq28z610 gas gauge communicates via an I2C 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.

The bq28z610 device provides an array of battery and system safety functions, including overcurrent in discharge, short circuit in charge, and short circuit in discharge protection for the battery, as well as FET protection for the N-channel FETs, internal AFE watchdog, and cell balancing. Through firmware, the devices can provide a larger array of features including protection against overvoltage, undervoltage, overtemperature, and more.

Features

  • Autonomous Battery Charging Control Using Dedicated Master Mode I2C Interface
  • Cell Balancing with Internal Bypass To Optimize Battery Health
  • High-Side Protection N-CH FET Drive Allows Serial Bus Communication During Fault Conditions
  • Programmable Protection Levels for Voltage, Current, and Temperature
  • Analog Front End with Two Independent ADCs
    • Support for Simultaneous Current and Voltage Sampling
    • High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
  • Supports Down to 1-mΩ Current Sense Resistor While Capable of 1-mA Current Measurement
  • Supports Battery Trip Point (BTP) Function for Windows® Integration
  • SHA-1 Authentication Responder for Increased Battery Pack Security
  • 400-kHz I2C Bus Communications Interface for High-Speed Programming and Data Access
  • Compact 12-Pin VSON Package (DRZ)

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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
BQ28Z610 BQ27542-G1 BQ27750 BQ4050 BQ40Z50-R1 BQ40Z50-R2 BQ40Z60 BQ78Z100
1-2 Cells    Single Cell    Single Cell    2-4 Cells
Single Cell   
2-4 Cells
Single Cell   
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
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer   
14000    32000    14000    29000    29000    29000    29000    14000   
I2C    HDQ
I2C   
I2C    SMBus    SMBus    SMBus    SMBus    HDQ   
100    100    100    500    100    500    100    100   
None    None    None    LED    LED    LED    LED    None   
Pack    Pack    Pack    Pack    Pack    Pack    Pack
System   
Pack   
IT (High accuracy)    IT (High accuracy)    IT (High accuracy)    CEDV    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   
External
Internal   
Battery Management Unit
Cell Balancing
Integrated Protector
SHA-1 Authentication   
SHA-1 Authentication    Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication   
Cell Balancing
Integrated Protector
SHA-1 Authentication   
Cell Balancing
Integrated Protector
SHA-1 Authentication
Turbo Mode   
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    -40 to 85   
12SON    12SON    12SON    32VQFN    32VQFN    32VQFN    32VQFN    12SON