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Lithium Primary Battery Fuel Gauge and End-of-Service Monitor


Package | PIN: PW | 14
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $3.44
10-24 $3.09
25-99 $2.88
100-249 $2.52
250-499 $2.37
500-749 $2.01
750-999 $1.70
1000+ $1.62


  • Fuel Gauge and Battery Diagnostics for Flow Meter Applications Predict End-of-Service or Early Battery Failure
    • Supports Lithium Thionyl Chloride (Li-SOCl2) and LithiumManganese Dioxide (Li-MnO2) Chemisty Batteries
    • AccurateVoltage, Temperature, Current, and Coulomb Counter Measurements that Report Battery Health andService Life
    • State-Of-Health (SOH) Algorithm forLi-MnO2
    • End-Of-Service (EOSAlgorithm for Li-SOCl2)
    • CoulombAccumulation (ACC) Algorithm for All Battery Types
  • Ultra-Low Average Power Consumption to Maximize Battery Run Time
    • Gauge Enabled Through Host-Controlled Periodic Updates
    • State-Of-Health (SOH) ~0.06 µA
    • End-Of-Service (EOS) ~0.35 µA
    • Coulomb Accumulation (ACC) Diagnostic Updates ~0.3µA
  • System Interaction Capabilities
    • I2C Host Communication, Providing Battery Parameterand Status Access
    • Configurable Host Interrupt
    • BatteryInformation Data Logging Options for in Operation Diagnostics and FailureAnalysis
    • SHA-1 Authentication to Help Prevent Counterfeit BatteryUse

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Texas Instruments  BQ35100PW

The bq35100 Battery Fuel Gaugeand End-Of-Service Monitor provides highly configurable fuel gauging for non-rechargeable (primary)lithium batteries without requiring a forced discharge of the battery. Built so that optimizationis not necessary to achieve accurate gauging, the bq35100 device uses patented TI gaugingalgorithms to support the option to seamlessly replace an old battery with a new one.

The bq35100 device provides accurate results with ultra-low averagepower consumption where less than 2 µA can be achieved through host control via the GAUGE ENABLE(GE) pin. The device is only required to be powered long enough, at a system-determined updatefrequency, to gather data and to make calculations to support the selected algorithm. A typicalsystem may need to only be updated once every 8 hours as the gauge is not required to be powered tomeasure all discharge activity.

The fuel gauging functions use voltage, current, and temperaturemeasurements to provide State-Of-Health (SOH) data and End-Of-Service (EOS) warning informationwhere the host can read the gathered data through a 400-kHz I2C bus. AnALERT output, based on a variety of configurable status and data options, is also available tointerrupt the host.