BQ27546-G1 Single Cell Impedance Track Pack Side Fuel Gauge | TI.com

BQ27546-G1 (ACTIVE)

Single Cell Impedance Track Pack Side Fuel Gauge

Single Cell Impedance Track Pack Side Fuel Gauge - BQ27546-G1
 

Description

The bq27546-G1 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires minimal system microcontroller firmware development for accurate battery fuel gauging. The bq27546-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non-removable).

The bq27546-G1 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 (min.), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The bq27546-G1 features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

The device comes in a 15-ball Nano-Free™ DSBGA package (2.61 mm × 1.96 mm) that is ideal for space-constrained applications.

Features

  • Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • 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 15-Ball Nano-Free™ (DSBGA) Packaging

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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
BQ27546-G1 BQ27320 BQ27520-G4 BQ27542-G1 BQ27742-G1 BQ27750
Single Cell     Single Cell     Single Cell     Single Cell     Single Cell     Single Cell    
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    
32000     29000     32000     32000     16000     14000    
HDQ
I2C    
I2C     I2C     HDQ
I2C    
HDQ
I2C    
I2C    
100     100     100     100     200     100    
None     None     None     None     None     None    
Pack     Pack
System    
System     Pack     Pack     Pack    
Impedance Track     CEDV     Impedance Track     Impedance Track     Impedance Track     Impedance Track    
N/A     N/A     N/A     N/A     N/A     N/A    
SHA-1 Authentication     N/A     N/A     SHA-1 Authentication     Integrated Protector
SHA-1 Authentication    
Accumulated Coulomb Count
Battery Management Unit
Integrated Protector
SHA-1 Authentication    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
15DSBGA     15DSBGA     15DSBGA     12SON     15DSBGA     12SON