BQ28Z610 Battery fuel gauge with integrated protector for 1-2 series packs | TI.com

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

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Part number Order 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) Package Group Package size: mm2:W x L (PKG)
BQ28Z610 Order now 1-2 Cells     Li-Ion/Li-Polymer     14000     I2C     100     None     Pack     Impedance Track     External
Internal    
Battery Management Unit
Cell Balancing
Integrated Protector
SHA-1 Authentication    
-40 to 85     SON | 12     See datasheet (SON)    
BQ27750 Order now Single Cell     Li-Ion/Li-Polymer
LiFePO4    
14000     I2C     100     None     Pack     Impedance Track         Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication    
-40 to 85     SON | 12     See datasheet (SON)    
BQ4050 Order now 2-4 Cells
Single Cell    
Li-Ion/Li-Polymer
LiFePO4    
29000     SMBus     500     LED     Pack     CEDV     External
Internal    
Cell Balancing
Integrated Protector
SHA-1 Authentication    
-40 to 85     VQFN | 32     32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
BQ40Z50-R1 Order now 2-4 Cells
Single Cell    
Li-Ion/Li-Polymer
LiFePO4    
29000     SMBus     100     LED     Pack     Impedance Track     External
Internal    
Cell Balancing
Integrated Protector
SHA-1 Authentication
Turbo Mode    
-40 to 85     VQFN | 32     32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
BQ40Z50-R2 Order now 2-4 Cells
Single Cell    
Li-Ion/Li-Polymer
LiFePO4    
29000     SMBus     100     LED     Pack     Impedance Track     External
Internal    
Cell Balancing
Integrated Protector
SHA-1 Authentication
Turbo Mode    
-40 to 85     VQFN | 32     32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
BQ78Z100 Order now 1-2 Cells     Li-Ion/Li-Polymer     14000     HDQ     100     None     Pack     Impedance Track     External
Internal    
Cell Balancing
Integrated Protector
SHA-1 Authentication    
-40 to 85     SON | 12     See datasheet (SON)