ACT4751M

    40 V, 4.0 A, USB Fast Charger Power IC for Automotive

    Key Features

    • AEC-Q100 Grade 1: -40 to +125°C
    • CISPR 25 Class 3: PASS
    • Certified USB Fast Charger, Reference Designs
    • Qualcomm Certified, Quick Charger 4+ Designs
    • 4.5 to 40 V operational input voltage
    • Programmable output voltage by I2C from 3 to 24 V in 12.5 mV steps
    • Programmable output current limit from 0 to 4 A in 256 step resolution
    • Automotive, side-wall-plating, 5 mm x 5 mm QFN package

    Qorvo's ACT4751M is an automotive grade, programmable voltage regulator with bias supply rails for microcontrollers or USB PD controllers. It supports a wide input voltage range from 4.5 to 40 V and uses a synchronous step-down (buck) DC-to-DC architecture. It integrates both the high side and low side MOSFETS. These 50 mOhm on-resistance transistors enable high efficiency to reduce power losses.

    The product's main buck converter can be dynamically programed to an output voltage between 3 and 24 V in 12.5 mV steps via the I2C interface or analog feedback. It also can dynamically program output current between 0 and 4 A in 256 steps via the I2C interface in a constant-current (CC) operation mode. The main buck operates in a proprietary current mode control that supports external clock syncing for switching frequencies between 450 kHz and 2.25 MHz with features of 100% duty, out-of-AM radio frequency and spread-spectrum operation.

    ACT4751M is a perfect solution for USB Fast Charger applications based on the Power Delivery (PD) 3.0 and Programmable Power Supply (PPS) applications. The product integrates a 5 V / 350 mA mini-buck converter and a 20 mA AUX LDO of 0.9 V to 4.0 V to simplify application system designs. These rails can power up a controller and the 1.5 W VCONN line in active USB-C cables.

    ACT4751M provides an I2C port supporting fast-mode plus (Fm+, 1 MHz) with configurable address and also provides a full set of protections including UVLO, over-voltage input voltage lockout, OVP, UVP (Hiccup/Latch-off), OCP and TSD.

    ACT4751M is available in an AEC-Q100 grade, step-cut, side-wall-plating, 32-pin 5mm x 5mm QFN package with a power optimized footprint and exposed pad for improved thermal performance.

    Typical Applications

      • USB Fast Charger (PD 3.0 PPS), USB PD Charger
      • Quick Charge 4+, Quick Charge 4, Quick Charge 3.0
      • High Power LED Lighting
    Topology Step-Down
    Input Voltage(V) 4.5 to 40
    Max Output Current(A) 4.0
    Frequency(kHz) 450 to 2,250
    USB PD 3.0 PPS Certification Yes
    Programmable Current Limit Output
    Auxiliary Power Rails Mini-Buck: 350mA; LDO: 20mA
    AEC-Q100 Yes
    Package Type QFN, 32-pin with step-cut & side-wall-plating
    Package(mm) 5 x 5
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99

    ACT4751EVK1-101ACT4751EVK1-101 Evaluation Kit

    ACT4751EVK1-101 Evaluation Tool User's Guide

    This document describes the characteristic and operation of the Qorvo ACT4751EVK1-101 evaluation kit (EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data.

    To communicate with the ACT4751EVK-101 a USB Dongle and a Graphical User Interface (GUI) is provided.

    The ACT4751EVK1-101 demonstrates the ACT4751QI-101 power management IC.

    ACT4751 Altium Symbol & Footprint

    ACT4751 GUIACT4751 GUI

    The ACT4751 Graphical User Interface (GUI) is packaged in a ZIP file that includes the software and all necessary drivers to communicate with the ACT4751EVK1-101 Evaluation Tool, as well as all descriptions how to use the tool.

    ACT4751M-101-REF04 Reference Design

    12 VDC Input, 80W (20V/4A) USB-C Charger (USB PD 3.0) with Cypress CCG3PA
    (USB Test ID: 2254)

    Certified USB Charger 80W Reference Design Photo

    Qorvo achieved qualification for an 80W USB PD 3.0 reference design with the automotive AEC-Q100 device ACT4751M and a PD controller from Cypress (CCG3PA).

    This automotive application target design outputs 80W (20V / 4A) at the USB-C port from 12VDC input voltage source, like 12V batteries.

    Block Diagram

    All design details and layout files can be downloaded here. Please contact your Qorvo representative to get additional support.

    ACT4751M-101-REF05 Reference Design

    Qualcomm® Certified Quick Charge 4+ 80W ×2, Quick Charge 3.0 60W ×2, USB Power Charging Hub with Cypress CCG3PA
    (QC20191223118)

    QC Logos Reference Design Photo

    See Charger 80W and FAST CHARGER 80W designs, based on the same PCB.

    Qorvo achieved qualification for a Quick Charge 4+ and Quick Charge 3.0 reference design with the automotive AEC-Q100 device ACT4751M and a PD controller from Cypress (CCG3PA).

    These USB-C™ channels supports programmable 80W output voltage and current Quick Charge 4+.

    Voltage programming range: 3V to 21V in 20mV steps
    Current programming range: 1A to 4A in 50mA steps

    These Type-A channels supports programmable 60W output voltage Quick Charge 3.0 (and Quick Charge 2.0).

    Voltage programming range: 5V to 20V in 200mV step (Quick Charge 3.0)
    Voltage programming range: 5V / 9V/ 12V / 20V

    Block Diagram

    All design details and layout files can be downloaded here. Please contact your Qorvo representative to get additional support.