BQ27545-G1 Single Cell, Pack Side, Impedance Track Fuel Gauge | TI.com

BQ27545-G1
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Single Cell, Pack Side, Impedance Track Fuel Gauge

 

Description

The bq27545-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 bq27545-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non removable).

The bq27545-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 (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The bq27545-G1 also 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 14500-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 and 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 Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ27545-G1 Order now Single Cell     Li-Ion/Li-Polymer     16000     HDQ
I2C    
300     None     Pack     IT (High accuracy)     SHA-1 Authentication     -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27500-V130 Samples not available Single Cell     Li-Ion/Li-Polymer     8000     I2C     300     None     System     IT (High accuracy)       -40 to 85     DSBGA | 12
SON | 12    
See datasheet (DSBGA)
12SON: 10 mm2: 2.5 x 4 (SON | 12)    
BQ27501 Samples not available Single Cell     Li-Ion/Li-Polymer     8000     I2C     300     None     System     IT (High accuracy)       -40 to 85     SON | 12     12SON: 10 mm2: 2.5 x 4 (SON | 12)    
BQ27505-J5 Samples not available Single Cell     Li-Ion/Li-Polymer     8000     I2C     300     None     System     IT (High accuracy)       -40 to 85     DSBGA | 12     See datasheet (DSBGA)