bq78z100 - Texas Instruments

bq78z100 Gas Gauge

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-.

Features

•1 High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
• High-Side FET Drive Allows Serial Bus Communication During Fault Conditions
• Analog Front End with Two Independent ADCs
  – Support for Simultaneous Current and Voltage Sampling
• Bus Communications Interface Options
  – I2C
  – HDQ
• SHA-1 Hash Message Authentication Code (HMAC) Responder for Increased Battery Pack Security
  – Split Key (2 × 64) Stored in Secure Memory
• Programmable Protection Levels for:
  – Overcurrent in Discharge
  – Short-Circuit Current in Charge
  – Short-Circuit Current in Discharge
  – Overvoltage
  – Under.