SI3473B-A01-IM

Overview

The SI3473B-A01-IM is a Power Sourcing Equipment (PSE) controller designed for IEEE 802.3bt PoE applications. It supports eight Ethernet ports with up to 45W per port capability. The device integrates power switch ICs and operates within a temperature range of -40°C to +85°C. It utilizes a 56-QFN package and functions at an operating supply voltage of 3.3V. The component complies with RoHS standards and handles moisture sensitivity requirements for surface mount assembly.

Feature Summary

• Supports IEEE 802.3at, 802.3af, and 802.3bt PoE standards
• Integrates eight-channel power switching capabilities
• Enables high-power delivery for demanding network devices
• Includes built-in protection mechanisms for port safety

Applications

• High-powered IP cameras requiring substantial power budgets
• Wireless access points with advanced feature sets
• Industrial automation controllers needing reliable PoE injection
• Network infrastructure hubs supporting 802.3bt endpoints

Procurement Notes

Verify the specific suffix IM versus IMR to confirm tape-and-reel packaging if required for automated assembly. Confirm moisture sensitivity level (MSL) ratings before storage and reflow soldering processes. Ensure the 56-QFN exposed pad thermal design matches your PCB layout for adequate heat dissipation during full load operation.

Selection Notes

Select this component when designing systems requiring eight independent PoE ports with 802.3bt compliance. It is suitable for applications needing integrated power switching rather than discrete solutions. Consider the QFN package constraints for thermal management and board space limitations compared to larger connector-based alternatives.

Part Context

This part belongs to Skyworks' portfolio of PoE LAN controllers. It complements other models like the SI3471A and SI3474B by offering a mid-range port count. The series focuses on simplifying PSE design by integrating control logic and power stages into a single compact solution for modern networking equipment.

Replacement Considerations

Check SI3473B-A01-IMR for identical functionality in reel packaging. Verify SI3471A-A01-IM for single-port alternatives or SI3474B-A02-IMR for four-port configurations if port density requirements differ.