BQ27542-G1 (ACTIVE)

Single Cell Impedance Track Pack Side Fuel Gauge

 

Description

The Texas Instruments bq27542-G1 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development for accurate battery fuel gauging. The fuel gauge resides within the battery pack or on the main board of the system with an embedded battery (non-removable).

The fuel gauge uses the patented Impedance Track algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The fuel gauge also features integrated support for secure battery pack authentication, using theSHA-1/HMAC authentication algorithm.

Features

  • Battery Fuel Gauge for 1-Series (1sXp) Li-Ion
    Applications up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging Supports up to
      14,500 mAh
    • Internal or External Temperature Sensor for
      Battery Temperature Reporting
    • SHA-1/HMAC Authentication
    • Lifetime Data Logging
    • 64 Bytes of Non-Volatile Scratch Pad FLASH
  • Battery Fuel Gauging Based on Patented
    Impedance Track™ Technology
    • Models Battery Discharge Curve for Accurate
      Time-To-Empty Predictions
    • Automatically Adjusts for Battery Aging,
      Battery Self-Discharge, and Temperature/Rate
      Inefficiencies
    • Low-Value Sense Resistor (5 mΩ to 20 mΩ)
  • Advanced Fuel Gauging Features
    • Internal Short Detection
    • Tab Disconnection Detection
  • HDQ and I2C Interface Formats for
    Communication with Host System
  • Small 12-pin 2.50 mm × 4.00 mm SON Package
  • Complies with Battery Trip Point (BTP)
    Requirements

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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
BQ27542-G1 BQ27220 BQ27320 BQ27426 BQ27510-G3 BQ27520-G4 BQ27546-G1 BQ27621-G1 BQ27750 BQ28Z610 BQ34110 BQ34Z100-G1 BQ35100 BQ4050 BQ40Z50-R1 BQ40Z60 BQ78350-R1 BQ78Z100
Single Cell    Single Cell    Single Cell    Single Cell    Single Cell    Single Cell    Single Cell    Single Cell    Single Cell    1-2 Cells    2-4 Cells
>4 Cells
Single Cell   
2-4 Cells
>4 Cells
Single Cell   
2-4 Cells
>4 Cells
Single Cell   
2-4 Cells
Single Cell   
2-4 Cells
Single Cell   
2-4 Cells    >4 Cells    1-2 Cells   
Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer    Lead Acid
Li-Ion/Li-Polymer
LiFePO4
NiCd
NiMH   
Lead Acid
Li-Ion/Li-Polymer
LiFePO4
NiCd
NiMH   
Primary Lithium    Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer
LiFePO4   
Li-Ion/Li-Polymer   
32000    29000    29000    14000    16000    32000    32000    32000    14000    14000    29000    29000    32000    29000    29000    29000    320000    14000   
HDQ
I2C   
I2C    I2C    I2C    I2C    I2C    HDQ
I2C   
I2C    I2C    I2C    I2C    HDQ
I2C   
I2C    SMBus    SMBus    SMBus    I2C
SMBus   
HDQ   
100    100    100    100    300    100    100    100    100    100    100    100    100    500    100    100    100    100   
None    None    None    None    None    None    None    None    None    None    None    LED    None    LED    LED    LED    LCD
LED
SOC   
None   
Pack    Pack
System   
Pack
System   
System    System    System    Pack    System    Pack    Pack    Pack
System   
Pack
System   
Pack
System   
Pack    Pack    Pack
System   
Pack    Pack   
IT (High accuracy)    CEDV    CEDV    IT (High accuracy)    IT (High accuracy)    IT (High accuracy)    IT (High accuracy)    Dynamic Voltage Correlation    IT (High accuracy)    IT (High accuracy)    CEDV    IT (High accuracy)    Primary    CEDV    IT (High accuracy)    IT (High accuracy)    CEDV    IT (High accuracy)   
N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    External
Internal   
N/A    N/A    N/A    External
Internal   
External
Internal   
External
Internal   
External
Internal   
External
Internal   
SHA-1 Authentication    N/A    N/A    N/A    N/A    N/A    SHA-1 Authentication    No Sense Resistor Required    Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication   
Battery Management Unit
Cell Balancing
Integrated Protector
SHA-1 Authentication   
Accumulated Coulomb Count
End of Service
SHA-1 Authentication   
SHA-1 Authentication    End of Service    Cell Balancing
Integrated Protector
SHA-1 Authentication   
Cell Balancing
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   
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    -40 to 85    -40 to 85    -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    9DSBGA    15DSBGA    9DSBGA    12SON    15DSBGA    15DSBGA    9DSBGA    12SON    12SON    14TSSOP    14TSSOP    14TSSOP    32VQFN    32VQFN    32VQFN    30TSSOP    12SON