SBS 1.1-Compliant Gas Gauge and Protection-Enabled IC with Impedance Track(TM) - BQ20Z75

BQ20Z75 (NRND)

SBS 1.1-Compliant Gas Gauge and Protection-Enabled IC with Impedance Track(TM)


Not Recommended for New Designs (NRND)

Replaced By BQ20Z75-V180– The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.


The bq20z75 SBS-compliant gas gauge and protection IC is a single IC solution designed for battery-pack or in-system installation. The bq20z75 measures andmaintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals, monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack as well and reports the information to the system host controller over a serial-communication bus. Together with the integrated analog front-end (AFE) short-circuit and overload protection the bq20z75 maximizes functionality, safety and minimize external component count, cost and size in smart battery circuits.

The implemented Impedance Track™ gas gauging technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle with high accuracy.


  • Next Generation Patented Impedance Track™ Technology accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
    • Better than 1% Error Over Lifetimeof the Battery
    • Instant Accuracy — No Learning Cycle Required
  • Supports the Smart Battery Specification
    SBS V1.1
  • Flexible Configuration for 2 to 4 Series Li-Ion and Li-Polymer Cells
  • Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
  • Full Array of Programmable Protection Features
    • Voltage, Current and Temperature
  • Supports SHA-1 Authentication
  • small 38-Pin TSSOP (DBT) Package
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation


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