BQ27532-G1 Battery Management Unit Impedance Track Fuel Gauge for bq2425x Charger | TI.com

BQ27532-G1
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Battery Management Unit Impedance Track Fuel Gauge for bq2425x Charger

 

Description

The bq27532-G1 system-side, Li-Ion battery management unit is a microcontroller peripheral that provides Impedance Track™ fuel gauging and charging control for single-cell Li-Ion battery packs. The fuel gauge requires little system microcontroller firmware development. Together with bq2425x single-cell switch-mode charger, the fuel gauge manages an embedded battery (non-removable) or a removable battery pack.

The fuel gauge uses the patented Impedance Track algorithm for fuel gauging, and provides information, such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (minimum), battery voltage (mV), temperature (°C), and SoH (%).

Battery fuel gauging with the device requires only PACK+ (P+), PACK– (P–), and thermistor (T) connections to a removable battery pack or embedded battery circuit. The 15-pin NanoFree™ (CSP) package has dimensions of 2.61 mm × 1.96 mm with 0.5-mm lead pitch. It is ideal for space-constrained applications.

Features

  • Battery Fuel Gauge and Charger Controller for 1-
    Cell Li-Ion Applications up to 14,500-mAh
    Capacity
  • Resides on System Main Board
  • Battery Fuel Gauge Based on Patented
    Impedance Track™ Technology
    • Models the Battery Discharge Curve for
      Accurate Remaining Capacity Predictions
    • Automatically Adjusts for Battery Aging,
      Battery Self-Discharge, and Temperature and
      Rate Inefficiencies
    • Low-value Sense Resistor (5 to 20 mΩ)
  • Battery Charger Controller With Customizable
    Charge Profiles
    • Configurable Charge Voltage and Current
      Based on Temperature
    • Optional State-of-Health (SoH) and Multi-Level
      Based Charge Profiles
  • Host-free Autonomous Battery Management
    System
    • Reduced Software Overhead Allows for Easy
      Portability Across Platforms and Shorter OEM
      Design Cycles
    • Higher Safety and Security
  • Runtime Improvements
    • Longer Battery Runtime Leveraging
      Impedance Track™ Technology
    • Tighter Accuracy Controls for Charger
      Termination
    • Improved Recharge Thresholds
  • Intelligent Charging – Customized and Adaptive
    Charging Profiles
    • Charger Control Based on SoH
    • Temperature Level Charging (TLC)
  • Stand-alone Battery Charger Controller for
    bq2425x Single-Cell Switch-mode Battery Charger
  • 400-kHz I2C Interface for Connection to System
    Microcontroller Port

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)
BQ27532-G1 Order now Single Cell     Li-Ion/Li-Polymer     8000     I2C     300     None     System     Impedance Track         Battery Management Unit
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-40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)