The SI3458-B03-IM, manufactured by Silicon Labs, is a highly integrated Power over Ethernet (PoE) Powered Device (PD) controller. This device is designed to comply with the IEEE 802.3at standard (PoE+) and enables efficient power delivery over Ethernet cables. It includes all necessary functions for a PoE PD application, simplifying design and reducing component count.

Applications

• IP Phones
• IP Cameras
• Wireless Access Points
• IoT Devices
• Networked Sensors

Features

• IEEE 802.3at (PoE+) Compliant
• Integrated High-Efficiency DC-DC Converter
• Automatic Detection and Classification
• Programmable Current Limit
• Overload and Short-Circuit Protection
• Under-Voltage Lockout (UVLO)
• Small Form Factor

Benefits

• Simplified PoE Design: Integrated features reduce design complexity and component count.
• High Efficiency: Integrated DC-DC converter maximizes power conversion efficiency, reducing heat dissipation.
• Reliable Operation: Comprehensive protection features ensure robust and reliable performance.
• Plug-and-Play Functionality: Automatic detection and classification streamline installation.
• Cost-Effective: Reduces overall system cost through integration and efficiency.

Additional Details

The SI3458-B03-IM integrates a high-efficiency DC-DC converter that converts the PoE input voltage (typically 48V) to a lower voltage required by the powered device. It automatically detects and classifies the power level requested by the PD, ensuring compatibility with various PoE PSE (Power Sourcing Equipment). The programmable current limit allows for customization of the power delivery based on the application requirements. The overload and short-circuit protection features protect the device and the connected equipment from damage. The under-voltage lockout (UVLO) ensures that the device operates only when the input voltage is within the specified range. This PoE PD controller is commonly used in IP phones, IP cameras, wireless access points, and other networked devices. The small form factor allows for integration into space-constrained applications. Silicon Labs' SI3458-B03-IM provides a comprehensive and efficient solution for PoE PD applications, offering ease of design, reliable operation, and cost-effectiveness.