BQ27541-G1 Pack-Side Impedance Track Battery Fuel Gauge With Integrated LDO | TI.com

BQ27541-G1
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Pack-Side Impedance Track Battery Fuel Gauge With Integrated LDO

 

Description

The Texas Instruments bq27541-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 (nonremovable).

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 the SHA-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 2,5 mm × 4 mm SON Package

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)
BQ27541-G1 Order now Single Cell     Li-Ion/Li-Polymer     14500     HDQ
I2C    
300     None     Pack     IT (High accuracy)     SHA-1 Authentication     -40 to 85     SON | 12     12SON: 10 mm2: 2.5 x 4 (SON | 12)    
BQ26500 Samples not available Single Cell     Lead Acid
Li-Ion/Li-Polymer
NiCd
NiMH    
6000     HDQ     300     None     Pack
System    
    0 to 70     TSSOP | 8     8TSSOP: 19 mm2: 6.4 x 3 (TSSOP | 8)    
BQ27010 Samples not available Single Cell     Li-Ion/Li-Polymer     6000     HDQ     300     None     Pack     CEDV       -20 to 70     VSON | 10     10VSON: 12 mm2: 3 x 4 (VSON | 10)    
BQ27210 Samples not available Single Cell     Li-Ion/Li-Polymer     6000     I2C     300     None     Pack     CEDV       -20 to 70     VSON | 10     10VSON: 12 mm2: 3 x 4 (VSON | 10)    
BQ27510-G2 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)