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RT9478

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

RT9478
New

The RT9478 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. It also compliant with Intel IMVP 9.2 features. The device’s SMBus serial communication interface enables flexible programming of various parameters, including charging current, charging voltage, IMVP features, 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

  • Notebook PCs
  • Tablets/Chromebooks
  • Drones
  • Portable Speakers
  • Portable Devices and Accessories

Key Spec.

RT9478
Status Active
Vin (min) (V) 3.8
Vin (max) (V) 24
Battery Charge Voltage (max) (V) 19.2
Battery Charge Current (max) (A) 16.256
Status Indicator Yes
Charger Type Switching
Input Source AC Adapter;USB
Features Adjustable Current Limit;Adjustable Frequency;OCP;OVP;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 IMVP 9.2 Compliant Features

  • Multi-Level Input Current Limit

  • Vmin Active Protection (VAP)

  • PROCHOT Open-Drain Output

  • System Power Monitor (PSYS)

  • Support USB On-The-Go (OTG)

  • 5V NMOSFET Gate Driver

  • 8-Bit A/D Converter for Monitor Functions

  • Input, System and Battery Voltage

  • Input (IBUS) and Battery (IBAT) Current

  • System Power

  • Independent Comparator Input Voltage

  • Low Battery Quiescent Current

  • Programmable System Overvoltage Protection

  • Protection

  • Input, System and Battery Overvoltage Protection

  • System Undervoltage Protection

  • Input and Battery Overcurrent Protection

  • Over-Temperature Protection

  • SMBus Compliant Serial Communication

Datasheet

RT9478_DS-00.pdf

Datasheet

RT9478_DS-00.pdf

Contact us for more information