BQ34210-Q1

• Automotive-Qualified AEC-Q100, Grade 3
• 1-Series Cell Battery Fuel Gauge Supports Li-Ion, LiFePO4, and NiMH (3-Cell) Chemistries
  • Resides on System Board
  • Powers Directly from the Battery with Integrated LDO
  • Supports a Low-Value External Sense Resistor (10 mΩ)
• Learning Load Enable (LEN) from Host
• Ultra-Low Power Consumption in NORMAL (50 µA) and SLEEP (9 µA) Modes
• Supports Replacement Batteries
• Accurate End-of-Service (EOS) Determination for Batteries in Rarely Discharged Applications
• CEDV Gas Gauge for 1-Series Cell Batteries, Providing:
  • State-of-Charge (SOC)
  • Time-to-Empty (TTE)
  • State-of-Health (SOH)
• High-Side and Low-Side Current Sensing Options
• Internal Temperature Sensor OR External Thermistor
• Microcontroller Peripheral Interface Supports:
  • 400-kHz I²C™ Serial Interface
  • Configurable Interrupt (ALERT) for SOC, Battery Levels, Temperature Faults, and Charge/Discharge Status

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The bq34210-Q1 1-Series Cell System-Side CEDV Fuel Gauge provides fuel gauging and End-of-Service (EOS) Determination for 1-series cell batteries in applications that encounter infrequent discharge, such as eCall systems and uninterruptible power supplies (UPS) for backup during power failures, where batteries may stay connected to a charging power source most of their lifetime until needed. The bq34210-Q1 fuel gauge supports multiple battery chemistries, including Li-Ion, LiFePO4, and NiMH.

The gas gauging function uses voltage, current, and temperature data along with Compensated End-of-Discharge (CEDV) technology to provide State-of-Charge (SOC) and State-of-Health (SOH) data. The device’s EOS Determination function alerts when battery capability has degraded and is approaching the end of its usable service.

Battery fuel gauging with the bq34210-Q1 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery management system.