text.skipToContent text.skipToNavigation


SBS 1.1 Compliant Gas Gauge with LED/LCD Drive feature and Impedance Track™ Technology


Package | PIN: DBT | 44
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $6.79
10-24 $6.11
25-99 $5.70
100-249 $5.12
250-499 $4.77
500-749 $4.15
750-999 $3.60
1000+ $3.52


  • Next Generation Patented Impedance Track™
    Technology Accurately Measures Available
    Charge in Li-Ion and Li-Polymer Batteries
    • Better Than 1% Error Over the Lifetime of the
  • Supports Smart Battery Specification SBS V1.1
  • Flexible Configuration for 2-Series to 4-Series Li-
    Ion and Li-Polymer Cells
  • Powerful 8-Bit RISC CPU with Ultralow Power
  • Full Array of Programmable Protection Features
    • Voltage, Current, and Temperature
  • Satisfies JEITA Guidelines
  • Added Flexibility to Handle More Complex
    Charging Profiles
  • Lifetime Data Logging
  • Drives 3, 4, or 5 Segment Liquid Crystal Display
    and LED for Battery-Pack Conditions
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge
    Solution in One Package

Texas Instruments  BQ20Z655DBTR-R1

The bq20z655-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z655-R1 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z655-R1 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack which 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 bq20z655-R1 maximizes functionality and safety while minimizing 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.