BQ76925 3-Series to 6-Series Cell Li-Ion and Li-Phosphate Battery Monitor (Analog Front End)

1 Features

• 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 cell balancing current
• Supports cell sense-line open wire detection
• Integrated 3.3-V regulator for powering micro-controller or LEDs
• I²C interface for host communications
  • Optional packet CRC for robust operation
• Supply voltage range from 4.2 V to 26.4 V
• Low power consumption
  • 40 µA typical in NORMAL mode
  • 1.5 µA maximum in SLEEP mode
• 20-pin TSSOP or 24-pin VQFN package