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RT9440

2-5 Series Cell Fuel Gauge with Integrated Protector Solution for Li-Ion Battery Packs

RT9440
New

The RT9440 device is a highly accurate and integrated, 2-to-5-series-cell fuel gauge and protection solution, with autonomous cell balancing, protection and charger control.
The RT9440 integrates highly accurate analog peripherals, measures and maintains an accurate record of available capacity, voltage, current, and temperature. The RT9440 reports the battery pack parameters to the system host controller via the SMBus interface.
The recommended junction temperature range spans from -40°C to 125°C, while the ambient temperature range extends from -40°C to 85°C.

應用

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

主要規格

RT9440
Status Active
Number of Series Cells 2;3;4;5
Supply Voltage (min) (V) 2.8
Supply Voltage (max) (V) 26
Communication Interface SMBus
Package Type VQFN4x4-32

關鍵特性

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

  • Voltage Measurement: ±3mV

  • Current Measurement: ±0.5%

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

  • Hardware Current Protection: ±1mV

  • Autonomous Cell Balance

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

  • Support Both Voltage-Base and SOC-Base Cell Balance

  • 1.5V to 3.3V Configurable VOUT Power Supply

  • High-Side N-Channel FET Drivers

  • Auxiliary Overcurrent Protection by High-Side N-Channel FET Drop Voltage

  • Low Power Consumption
    - Normal Mode: 240μA
    - Sleep Mode Options: 70μA to 125μA
    - Deep Sleep Mode: 30μA
    - Shutdown Mode: 1.6μA

  • Low Value Sense Resistor: 0.5mΩ to 10mΩ

  • SHA-1/SHA-256/ECC Authentication

  • Hardware Load and Charger Detection

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

  • Support Battery Trip Point (BTP)

  • Lifetime Data Log and Black Box Recorder

  • LED Display Driver Pins with Scan Function

  • FUSE Driver

  • Support up to 1MHz SMBus Interface

  • IATA Support

  • 32 Pin VQFN Package with 0.4mm Pitch

Application Notes

Datasheet

RT9440_DS-01.pdf

Datasheet

RT9440_DS-01.pdf

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