7 Volt Power Loss Protection Device with 6 Amp eFuse and Blocking FET

    Key Features

    • Optimized for low voltage applications
    • 2.6 to 7 V operating input range
    • 8 V max input blocking voltage
    • Adjustable inrush current control
    • Configurable input power failure level
    • 28 V @ 4 A synchronous buck supports 100% duty cycle
    • Programmable up to 2.25 MHz buck operating frequency for small inductor size
    • Power loss, Vout Power Good, and Storage Cap Power Good indicators
    • Compatible with different types of storage capacitors
    • Autonomous health monitoring for detection of earlier storage capacitor failures
    • Configurable interrupts to inform host of any faults/status changes
    • eFuse, boost, and buck UV/OV/OC protection

    Qorvo's ACT4921 device is a highly integrated power loss protection IC that provides autarch capacitor health monitoring for optimized system protection. A built-in boost converter enables high voltage energy storage to minimize the storage capacitor size requirements. The built-in buck converter with integrates FETs regulates the storage voltage to the system voltage and also provides hot swap capability and inrush current control.

    The product is very flexible and can easily be configured and monitored with I2C and external components.

    ACT4921 is available in the thermal enhanced QFN 4×4 32 pin package.

    Typical Applications

      • Solid-State Drives
      • Power Backup Systems
      • Industrial Applications
      • eFuse
      • Hot Plug Devices
    Operating Input Range(V) 2.7 to 7
    eFuse Abs Max Voltage(V) 8
    eFuse FET RDS(on)(mohm) 20
    Storage Cap Voltage(V) 5 to 28
    Max Input Current(A) 6
    Buck FET RDS(on)(mohm) 46 (HS), 32 (LS)
    Buck Current(A) 4
    Buck Operation Frequency(kHz) 550 to 2,250
    Blocking FET(mohm) 30
    Interface I2C
    Autonomous Health Monitoring Yes
    ADC Yes
    Package Type QFN, 32-pin
    Package(mm) 4 x 4
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99

    ACT4921EVK1-301ACT4921EVK1-301 Evaluation Kit

    ACT4921EVK1-301 Evaluation Tool User's Guide

    This EVK demonstrates the ACT4921QW301 eFuse power management IC.

    This document describes the characteristic and operation of the Qorvo ACT4921EVK1QW301 evaluation kit (EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data.

    To communicate with the EVK a USB Dongle and a Graphical User Interface (GUI) is provided.

    ACT4921 Altium Layout Files

    ACT4921 GUIACT4921 GUI

    The ACT4921 GUI is a graphical interface that gives the user access to the ACT4921 internal registers. It is specifically designed for use with the ACT4921 EVK. The GUI allows the user to both read and modify the registers to configure the ACT4921-EVK specifically for the desired operating conditions. Note that GUI communication with the ACT4921 EVK requires the Qorvo USB-TO-I²C dongle.