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Qorvo ACT4751 | Demoboard ACT4751EVK1-101 User’s Guide
USB PD 3.0 Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current
Overview
| Topology | Buck Converter |
| Input voltage | 4-40 V |
| Switching frequency | 450-2250 kHz |
| Output 1 | 24 V / 4 A |
| IC revision | REF01 |
Description
The ACT4751 is a programmable DC-to-DC buck converter with bias supply rails for microcontrollers or USB PD controllers. It supports a wide input voltage of 4.5 V to 40 V and uses a synchronous step-down (buck) voltage regulator architecture. It integrates both the high side and low sideMOSFETS. These 50mΩ RDSON transistors enable high efficiency to reduce power losses.The ACT4751 main buck converter can be dynamically programed to an output voltage between 3 V and 24 V in 12.5 mV steps via the I2C or analog feedback. Also it can dynamically program output current between 0 A to 4 A in 256 steps via the I2C in a constant-current (CC) operation mode. The main-buck operates in a proprietary current modecontrol that supports external clock syncing for switching frequencies between 450 kHz and 2.25 MHz. The ACT4751 is a perfect solution for USB Power Delivery (PD) 3.0 and Programmable Power Supply (PPS) applications.The ACT4751 integrates a 5 V / 350 mA minibuck converter and a 20 mA AUX LDO to simplify application system designs. These rails can power up a controller and the 1.5W VCONN line in active USB-C cables.The ACT4751 is available in a 32-pin 5mm x 5mm QFN package with a power optimized footprint and exposed pad for improved thermal performance.
Features
- USB Certified Charger Design Available
- 4.5 V to 40 V Operational Input Voltage
- Programmable Output Voltage by I2C 3 V to 24 V in 12.5 mV Step
- Programmable Output Current Limit 4 A in 256 Step Resolution
- Fixed-Frequency Current-Mode Control from 450k to 2.25 MHz with External Clock Sync and 100% Duty Operation
- Out of AM Radio / Spread-Spectrum Operation
- 50 mΩ Integrated High-Side / Low-Side FETs
- 5 V / 350 mA Bias Buck Converter
- 20 mA AUX LDO, Programmable Output Voltage
- I2C Interface, Fast-mode Plus (Fm+, 1 MHz) with Configurable Address
- Protections:
- UVLO, OVP, UVP (Hiccup/Latch-off), OCP, TSD
- Thermally Enhanced 5 mm × 5 mm QFN Package
Typical applications
- Industrial SMPS for 24V Bus
- High Power LED Lighting
- USB PD 3.0 Charging Hub / Power Management for All USB-C Power Rails
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | fres (MHz) | IRP,40K (A) | ISAT,30% (A) | Mount | Application | Interface Type | Type | PCB Thickness (mm) | Gender | Pins | IR (A) | Working Voltage (V (DC)) | Endurance (h) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | Pitch (mm) | Ø D (mm) | RESR (mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150060BS75000 | SPEC | 25 files RAY files
| WL-SMCW SMT Mono-color Chip LED Waterclear | 470 | Blue | 465 | 145 | 3.2 | InGaN | 140 | – | – | – | 0603 | -40 °C up to +85 °C | – | – | – | 1.6 | 0.8 | 0.7 | – | Tape and Reel | – | – | – | – | – | – | – | SMT | – | – | – | – | – | – | – | – | – | -40 °C up to +85 °C | – | – | – | – | – | ||
 | 74439358047 | SPEC | 8 files | WE-XHMI SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | 8080 | -40 °C up to +125 °C | – | – | – | 8.8 | 8.3 | 8 | – | – | 4.7 | 9.5 | – | 8.65 | 22 | 13.35 | 16.65 | SMT | – | – | – | – | – | 2 | – | – | – | -40 °C up to +125 °C | – | – | – | – | – | ||
 | 860010674014 | SPEC | 7 files | WCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 100 µF | ±20% | 50 | – | – | 10 | – | – | 11.5 | – | – | – | Ammopack | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 2000 | -40 °C up to +85 °C | 286 | 50 | 3.5 | 8 | – | ||
 | 870055675009 | SPEC | 7 files | WCAP-PTHR Aluminum Polymer Capacitors | – | – | – | – | – | – | – | 100 µF | ±20% | 35 | – | – | 12 | – | – | 12.5 | – | – | – | Ammopack | – | – | – | – | – | – | – | Radial THT | – | – | – | – | – | – | – | – | 2000 | -55 °C up to +105 °C | 3700 | 700 | 5 | 10 | 25 | ||
 | 885012210032 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 2.2 µF | ±10% | 50 | 1812 | -55 °C up to +125 °C | 2.5 | 0.2 GΩ | X7R Class II | 4.5 | 3.2 | 2.5 | 0.75 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 74404043470A | SPEC | 8 files | WE-LQS SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | 4025 | -40 °C up to +125 °C | – | – | – | 4 | 4 | 2.5 | – | – | 47 | 0.71 | 0.45 | 492 | 15 | – | – | SMT | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | – | – | – | ||
 | 632723100011 | SPEC | – | 6 files | WR-COM USB 3.1 Type C Receptacle Horizontal THR / SMT | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | – | – | – | – | Tape and Reel | – | 5 | – | – | – | – | – | THR | USB 3.1 | Type C | Horizontal | 1 | Receptacle | 24 | – | 20 | – | – | – | – | – | – | – | |
 | 62900416021 | SPEC | – | 7 files | WR-COM USB 2.0 Type A Horizontal SMT | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | – | – | – | – | Tray | – | 1.5 | – | – | – | – | – | SMT | USB 2.0 | Type A | Horizontal | – | Receptacle | 4 | 1.5 | 30 | – | -40 °C up to +105 °C | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 150060BS75000 | SPEC | |
| 74439358047 | SPEC | |
| 860010674014 | SPEC | |
| 870055675009 | SPEC | |
| 885012210032 | SPEC | |
| 74404043470A | SPEC | |
| 632723100011 | SPEC | – |
| 62900416021 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | fres (MHz) | IRP,40K (A) | ISAT,30% (A) | Mount | Application | Interface Type | Type | PCB Thickness (mm) | Gender | Pins | IR (A) | Working Voltage (V (DC)) | Endurance (h) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | Pitch (mm) | Ø D (mm) | RESR (mΩ) | Samples |
|---|