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RT9441

2-to-4 Series Cell Fuel Gauge with Integrated Protection Solution for Li-Ion Battery Packs

RT9441
New Contact Us

The RT9441 device is a highly accurate and integrated, 2 to 4 series cell fuel gauge and protection solution. It features autonomous cell balancing, protection, and charger control.The RT9441 integrates highly accurate analog peripherals to measure and maintain an accurate record of available capacity, voltage, current, and temperature. It reports the battery pack parameters to the system host controller via the SMBus interface.The RT9441 is available in a WQFN-32L 4x4 package. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.

Applications

  • Notebooks
  • Power Tools
  • Drones
  • Tablets
  • UPS/Battery Backup Systems
  • Medical Equipment
  • Handheld Vacuum Cleaners and Vacuum Robots

Key Spec.

RT9441
Status Active
Number of Series Cells 2;3;4
Supply Voltage (min) (V) 2.8
Supply Voltage (max) (V) 26
Communication Interface SMBus
Package Type WQFN4x4-32

Features

  • State of Charge (SOC) Calculated by VoltaicGauge with Current Sensing (VGCS)

  • Voltage Measurement Accuracy: ±3mV

  • Current Measurement Accuracy: ±0.35% Battery Temperature Measurement Accuracy: ±1°C (TA = 0°C to 45°C)

  • Autonomous Cell Balancing

  • Configurable Protection Levels and Delay Times for Voltage, Temperature, Current Protection

  • Support Both Voltage-Based and SOC-Based Cell Balancing

  • High-Side N-Channel MOSFET Drivers

  • Low Power Consumption

  • Normal Mode: 150μA

  • Sleep Mode with DSG ON: 65μA

  • Shutdown Mode: 0.5μA

  • Low Value Sense Resistor: 1mΩ to 10mΩ

  • SHA-1/SHA-256/Hardware ECC Authentication

  • Support Intel Dynamic Battery Power Technology (DBPT V2.0)

  • Lifetime Data Log and Black Box Recorder

  • FUSE Driver

  • Support up to 1MHz SMBus Interface

  • IATA Support

  • 32 Pin WQFN Package with 0.4mm Pitch

Application Notes

Datasheet

RT9441_DS-00.pdf

Datasheet

RT9441_DS-00.pdf

Contact us for more information