SI3474A-A01-IM

Overview

The SI3474A-A01-IM is a Power Sourcing Equipment (PSE) controller compliant with the IEEE 802.3bt standard, designed for high-power PoE applications. It supports four Ethernet ports and delivers up to 90 W of output power per port. The device integrates a 255 mOhm current sense resistor for precise monitoring. It operates within a temperature range of -40°C to +85°C and utilizes a QFN-56 surface-mount package.

Feature Summary

• Supports four independent Ethernet ports for multi-port PSE implementations
• Complies with IEEE 802.3bt standards for high-power classification
• Integrates internal current sensing components for accurate power management

Applications

• High-power PoE network switches
• Multi-port LAN infrastructure equipment
• Power sourcing modules for enterprise networking

Procurement Notes

Verify the specific suffix IM against official Skyworks documentation to confirm the tray packaging configuration. Ensure compatibility with the Si3474-KIT development kit if prototyping. Confirm that the QFN-56 package dimensions align with your PCB layout requirements before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring four-port 802.3bt compliance. The integrated current sense resistor simplifies bill of materials by reducing external component count. Consider the thermal performance of the QFN-56 package in high-density layouts to ensure reliable operation across the specified industrial temperature range.

Part Context

This part belongs to the Si3474 series of specialized power management ICs from Skyworks Solutions. It is categorized under Power Switch ICs for POE/LAN applications. The device serves as a core controller for generating and managing power over Ethernet in modern network infrastructure.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.