bq76925 - Texas Instruments

bq76925 Host-Controlled Analog Front End

The bq76925 host-controlled analog front end (AFE) is part of a complete pack monitoring, balancing, and protection system for 3-, 4-, 5-, or 6-series cell Li-Ion and Li-Polymer batteries. The bq76925 device allows a Host controller to monitor individual cell voltages, pack current and temperature easily. The Host may use this information to determine unsafe.

Features

•1 Analog Interface for Host Cell Measurement
  – Cell Input MUX, Level Shifter, and Scaler
  – 1.5-/ 3.0-V Low-Drift, Calibrated Reference Allows Accurate Analog-to-Digital Conversions
• Analog Interface for Host Current Measurement
  – Variable Gain Current Sense Amplifier Capable of Operation with 1-mΩ Sense Resistor
• Switchable Thermistor Bias Output for Host Temperature Measurements
• Overcurrent Comparator With Dynamically Adjustable Threshold
  – Alerts Host to Potential Overcurrent Faults
  – Wakes up Host on Load Connect
• Integrated Cell Balancing FETs
  – Individual Host Control
  – 50 mA per Ce.