Product details

Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface DQ, SMBus Battery capacity (Min) (mAh) 800 Battery capacity (Max) (mAh) 32000 Implementation Pack External capacity indication LED Features Impedance Track™ algorithm, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal
Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface DQ, SMBus Battery capacity (Min) (mAh) 800 Battery capacity (Max) (mAh) 32000 Implementation Pack External capacity indication LED Features Impedance Track™ algorithm, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal
TSSOP (DBT) 44 71 mm² 11.15 x 6.4
  • 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 Battery
  • Supports the Smart Battery Specification SBS V1.1
  • Optional DQ Communication Interface
  • Flexible Configuration for 2-Series to 4-Series Li-Ion
    and Li-Polymer Cells
  • Powerful 8-Bit RISC CPU with Ultralow Power Modes
  • Full Array of Programmable Protection Features
    • Voltage
    • Current
    • Temperature
  • Satisfies JEITA Guidelines
  • Added Flexibility to Handle More Complex Charging Profiles
  • Drives 3-, 4-, and 5-Segment LED Display for Battery-Pack Conditions
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Available in a 44-Pin TSSOP (DBT) Package
  • 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 Battery
  • Supports the Smart Battery Specification SBS V1.1
  • Optional DQ Communication Interface
  • Flexible Configuration for 2-Series to 4-Series Li-Ion
    and Li-Polymer Cells
  • Powerful 8-Bit RISC CPU with Ultralow Power Modes
  • Full Array of Programmable Protection Features
    • Voltage
    • Current
    • Temperature
  • Satisfies JEITA Guidelines
  • Added Flexibility to Handle More Complex Charging Profiles
  • Drives 3-, 4-, and 5-Segment LED Display for Battery-Pack Conditions
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Available in a 44-Pin TSSOP (DBT) Package

The bq34z950 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 bq34z950 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. The bq34z950 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. SMBus and single-wire DQ communication interfaces are both available. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq34z950 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.

The bq34z950 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 bq34z950 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. The bq34z950 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. SMBus and single-wire DQ communication interfaces are both available. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq34z950 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.

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Technical documentation

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Type Title Date
* Data sheet SBS 1.1-COMPLIANT FUEL GAUGE WITH ADDITIONAL DQ INTERFACE datasheet (Rev. A) 21 May 2013
User guide bq34z950 Technical Reference Manual (Rev. B) 24 Dec 2014

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