BQ27742-G1 bq27742-G1 Single Cell Li-Ion Battery Fuel Gauge With Integrated Protection | Battery Gas Gauge | TI.com

BQ27742-G1 (ACTIVE) bq27742-G1 Single Cell Li-Ion Battery Fuel Gauge With Integrated Protection | Battery Gas Gauge

 

Description

The Texas Instruments bq27742-G1 is a fuel gauge for single-cell Li-Ion battery packs that uses patented Impedance Track™ technology to deliver rate-, temperature-, and aging-compensated predictions of remaining battery capacity and system runtime with highest accuracy. The device also includes a fully integrated high-side protector that eliminates the need for a separate Li-Ion protection circuit and provides a full suite of high-accuracy fault detections for overvoltage, undervoltage, overcurrent in charge, overcurrent in discharge, and short-circuit in discharge conditions. The hardware protection functions offer built-in data flash-based programmability, allowing simple reconfiguration of existing devices for varying end equipment needs.

The fuel gauge provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime to empty (minutes), voltage (mV), current (mA), and temperature (°C), as well as recording vital parameters throughout the lifetime of the battery. The device also supports interrupts to the host to indicate detection of a variety of important battery conditions to the system.

The DSBGA is a 15-ball package (2.78 mm × 1.96 mm) that is ideal for space-constrained applications.

Features

  • Battery Fuel Gauge and Protector for Single-Cell Li-Ion Applications
  • Microcontroller Peripheral Provides:
    • Precision 16-Bit, High-Side Coulomb Counter with Low-Value Sense Resistor
      (5 mΩ to 20 mΩ)
    • External and Internal Temperature Sensors for Battery Temperature Reporting
    • Lifetime and Current Data Logging
    • 64 Bytes of Non-Volatile Scratch Pad Flash
    • SHA-1 Authentication Capability
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Models Battery Discharge Curve for Accurate Time-To-Empty Predictions
    • Automatically Adjusts for Aging, Self-Discharge, and Temperature- and Rate-Induced Effects on Battery
  • Integrated High-side NMOS Protection FET Drive
  • Hardware-based Safety and Protection:
    • Overvoltage (OVP)
    • Undervoltage (UVP)
    • Overcurrent in Charge (OCC)
    • Overcurrent in Discharge (OCD)
    • Short-Circuit in Discharge (SCD)
  • I2C and HDQ Interface Formats for Communication with Host System
  • Ultra-Compact, 15-Ball NanoFree™ DSBGA

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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)
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)    
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)    
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)    
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)