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RT9478M

24V Input for 2 to 4 Cell NVDC Buck-Boost Battery Charge Controller with PROCHOT, IBAT, and IBUS Pins, and SMBus

RT9478M
New

The RT9478M is a 4-switch bidirectional buck-boost Narrow Voltage DC (NVDC) charge controller, designed to charge 2- to 4-cell batteries from a wide range of DC power sources, including USB-C Power Delivery (PD) sources, conventional AC-DC charger adapters, and mobile batteries. The device’s SMBus serial communication interface allows for flexible programming of various parameters, including charging current, charging voltage, and protection thresholds for overvoltage and undervoltage conditions affecting the input, battery, and system outputs.The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.

Applications

  • Drones
  • Portable Speakers
  • Portable Devices and Accessories

Key Spec.

RT9478M
Status Active
Vin (min) (V) 3.904
Vin (max) (V) 24
Battery Charge Voltage (max) (V) 19.2
Battery Charge Current (max) (A) 8.135
Status Indicator Yes
Charger Type Switching
Input Source AC Adapter;USB
Features OCP;OVP;SCP;SMBus;UVP
Package Type WQFN4x4-32
Built-in Power MOSFETs No

Features

  • Programmable Frequency: 720kHz/800kHz/1.2MHz

  • Wide Input Voltage Range from 3.8V to 24V
    - Average Input Current Regulation (AICR)
    - Minimum Input Voltage Regulation (MIVR)

  • Support 10mΩ and 5mΩ Sensing Resister

  • High Accuracy for 2% Battery Charge Current and 0.5% Voltage Regulation

  • Wide Battery Regulation Voltage Range from 5V to 19.2V

  • Support USB On-The-Go (OTG)

  • 5V NMOSFET Gate Driver

  • 8-Bit A/D Converter for Monitor Functions
    - Input, System and Battery Voltage
    - Input and Battery Current
    - System Power
    - Independent Comparator Input Voltage
    - Input (IBUS) and Battery (IBAT) Current

  • Low Battery Quiescent Current

  • Programmable System Overvoltage Protection

  • Protection
    - Input, System and Battery Overvoltage
    - System Undervoltage Protection
    - Input and Battery Overcurrent Protection
    - Over-Temperature Protection

  • SMBus Compliant Serial Communication

Datasheet

RT9478M_DS-00.pdf

Datasheet

RT9478M_DS-00.pdf

Contact us for more information