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

BQ27546-G1 (ACTIVE) Single Cell Impedance Track Pack Side Fuel Gauge

 

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

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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)
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     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27320 Order now Single Cell     Li-Ion/Li-Polymer     29000     I2C     100     None     Pack
System    
CEDV             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27520-G4 Order now Single Cell     Li-Ion/Li-Polymer     32000     I2C     100     None     System     Impedance Track             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
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     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27750 Order now Single Cell     Li-Ion/Li-Polymer
LiFePO4    
14000     I2C     100     None     Pack     Impedance Track         Battery Management Unit     -40 to 85     SON | 12     12SON: 10 mm2: 2.5 x 4 (SON | 12)    
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     12DSBGA: 3 mm2: 1.4 x 2.064 (DSBGA | 12)    
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     12DSBGA: 3 mm2: 1.4 x 2.064 (DSBGA | 12)