CUI Inc SMI45C AC/DC Power Adapters

Introduction

The CUI Inc SMI45C is a compact USB Type-C Power Delivery AC/DC wall adapter designed to supply dependable power to modern electronic devices. With up to 45 W of output capability and USB PD 3.0 support, it provides flexible charging and operating power across several common DC voltage levels.

Part Description

The SMI45C is a wall plug-in AC/DC power adapter with a USB Type-C output interface. It accepts a universal AC input, making it suitable for use with a broad range of mains power systems when paired with the appropriate regional plug configuration.

Using USB Power Delivery 3.0 negotiation, the adapter can provide selectable DC output voltages from 5 VDC through 20 VDC, with a maximum output power rating of 45 W. This allows a connected USB-C device to request an appropriate power profile rather than relying on a fixed-voltage supply.

Protection features include overvoltage protection, overcurrent protection, and short-circuit protection. The SMI45C also supports relevant safety and environmental requirements, including UL 62368 compliance and RoHS compliance.

Applications

Potential applications for the SMI45C include:

• USB-C laptop and notebook power supplies
• Tablet and handheld computer charging
• Portable test and measurement equipment
• USB-C docking stations and hubs
• Embedded development boards with USB-C PD input
• Industrial handheld terminals
• Point-of-sale and payment peripherals
• Portable medical and diagnostic equipment
• Battery charging systems with USB-C PD capability
• Network appliances and compact edge-computing devices

Industries

The SMI45C may be used in a variety of industries, including:

• Consumer electronics
• Information technology
• Telecommunications
• Industrial automation
• Test and measurement
• Medical electronics
• Retail and point-of-sale systems
• Education technology
• Smart home and building automation
• Commercial office equipment

Usage Ideas

1. USB-C Powered Development Bench
   Build a compact electronics workbench power setup using a USB-C PD trigger module to request 5 V, 9 V, 12 V, 15 V, or 20 V from the SMI45C for prototypes and microcontroller projects.

2. Portable Raspberry Pi or Single-Board Computer Station
   Power a USB-C compatible single-board computer, display interface, storage device, and low-power accessories from a portable workstation arrangement.

3. Smart Sensor Gateway
   Use the adapter as the primary supply for an edge gateway that combines wireless connectivity, environmental sensors, local data logging, and a USB-C PD power input board.

Conclusion

The CUI Inc SMI45C is a versatile 45 W USB Type-C Power Delivery wall adapter for devices requiring flexible DC power through a standardized USB-C connection. Its universal input range, PD 3.0 compatibility, selectable output voltages, and integrated protection features make it a practical power solution for consumer, commercial, industrial, and development applications.