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Details for Texas Instruments


Impedance Track™ Battery Fuel (Gas) Gauge for 1-Series to 2-Series
Buy Directly from Texas Instruments (447 in Stock)
$1.9900 per unit
Series Information for BQ78Z100DRZT - Texas Instruments


  • feature
    Analog Front End with Two Independent ADCs u2013 Support for Simultaneous Current and Voltage Sampling
  • feature
    Bus Communications Interface Options u2013 I2 C u2013 HDQ
  • feature
    Compact 12-Terminal SON Package (DRZ)
  • feature
    High-Accuracy Coulomb Counter with Input Offset Error < 1 u00b5V (Typical)
  • feature
    High-Side FET Drive Allows Serial Bus Communication During Fault Conditions
  • feature
    Programmable Protection Levels for: u2013 Overcurrent in Discharge u2013 Short-Circuit Current in Charge u2013 Short-Circuit Current in Discharge u2013 Overvoltage u2013 Undervoltage u2013 Overtemperature
  • feature
    SHA-1 Hash Message Authentication Code (HMAC) Responder for Increased Battery Pack Security u2013 Split Key (2 u00d7 64) Stored in Secure Memory
  • feature
    Supports a 1-mu03a9 to 3-mu03a9 Current Sense Resistor


The bq78z100 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The bq78z100 gas gauge communicates via an I2Ccompatible interface or single-wire HDQ interface and combines an ultra-low-power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-channel FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution. The bq78z100 device provides an array of battery and system safety functions, including overcurrent in discharge, short circuit in charge, and short circuit in discharge protection for the battery, as well as FET protection for the N-channel FETs, internal AFE watchdog, and cell balancing. Through firmware, the devices can provide a larger array of features including protection against overvoltage, undervoltage, overtemperature, and more.


Battery Management Function:
Authentication Fuel Gauge Protector
Battery Type:
LiFePO4 Li-Ion Li-Pol
Supply Voltage Min:
Supply Voltage Max:
Battery IC Case Style:
No. of Pins:
IC Interface Type:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
RoHS Phthalates Compliant:
MSL 2 - 1 year
No SVHC (27-Jun-2018)

Alternate Descriptions

Avnet America

Battery Pack Authentication IC Li-Ion/Li-Pol 26V 12-Pin SON T/R

Avnet America product

Avnet Europe

Battery Pack Authentication IC Li-Ion/Li-Pol 26V 12-Pin SON T/R

Avnet Europe product

Texas Instruments

Impedance Track™ Battery Fuel (Gas) Gauge for 1-Series to 2-Series

Texas Instruments product