BQ27750 Impedance Track™ Gas Gauge and Protection Solution for 1 Series | TI.com

BQ27750 (ACTIVE) Impedance Track™ Gas Gauge and Protection Solution for 1 Series

 

Description

The Texas Instruments bq27750 Impedance Track™ device is a highly integrated, accurate 1-series cell gas gauge and protection solution. The bq27750 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1-series cell li-ion and li-polymer battery packs.

The bq27750 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.

Features

  • 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
  • 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)
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)    
BQ27546-G1 Order now Single Cell     Li-Ion/Li-Polymer     32000     HDQ
I2C    
100     None     Pack     Impedance Track         SHA-1 Authentication     -40 to 85     DSBGA | 15     See datasheet (DSBGA)    
BQ27742-G1 Order now Single Cell     Li-Ion/Li-Polymer     16000     HDQ
I2C    
200     None     Pack     Impedance Track         Integrated Protector
SHA-1 Authentication    
-40 to 85     DSBGA | 15     See datasheet (DSBGA)    
BQ27Z561 Order now Single Cell     Li-Ion/Li-Polymer     30000     HDQ
I2C    
100     None     Pack     Impedance Track         SHA-256 Authentication     -40 to 85     DSBGA | 12     See datasheet (DSBGA)    
BQ27Z561-R1 Order now Single Cell     Li-Ion/Li-Polymer     30000     HDQ
I2C    
100     None     Pack     Impedance Track         SHA-256 Authentication     -40 to 85     DSBGA | 12     See datasheet (DSBGA)    
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)    
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)    
BQ40Z60 Order now 2-4 Cells     Li-Ion/Li-Polymer
LiFePO4