SI3473B-A01-IMR

Overview

The SI3473B-A01-IMR is an octal Power Sourcing Equipment (PSE) controller designed for IEEE 802.3bt, 802.3at, and 802.3af standards. It integrates eight independent channels, each capable of delivering up to 30W. The device operates with a supply voltage range of 3V to 3.6V and features a current limit of 425 mA per channel. It supports surface mount installation in a 56-QFN package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates eight independent PoE channels compliant with 802.3bt Type 4, 802.3at Type 2, and 802.3af Type 1 standards.
• Delivers up to 30W of power per channel for high-demand applications.
• Includes integrated protection mechanisms against overcurrent and thermal events.

Applications

• High-powered IP cameras requiring substantial power delivery
• Wireless access points with advanced antenna arrays
• Industrial automation devices connected via Ethernet

Procurement Notes

Verify the specific suffix IMR indicates the reel packaging variant when ordering. Confirm that the 56-QFN package dimensions match your PCB footprint requirements. Ensure the design supports the 3.3V operating voltage and thermal dissipation needs for 30W per channel loads. Check for RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when an octal PSE solution is required for 802.3bt deployments. It is suitable for designs needing individual channel control and high power density. Consider the QFN package size and thermal management capabilities during layout. Verify compatibility with upstream switch controllers and downstream PD negotiation protocols.

Part Context

This part belongs to Skyworks Solutions' family of PoE LAN controllers. It complements other models like the SI3470C series by offering higher channel counts and support for the latest 802.3bt standard. It serves as a central component in multi-port network infrastructure equipment.

Replacement Considerations

Check for direct substitutes such as the SI3473B-A01-IM which shares similar electrical characteristics but may differ in packaging or tape-and-reel configuration. Verify pinout compatibility before swapping components in existing designs.

FAQ

What is the maximum power output per channel?

Each channel can deliver a maximum of 30W, supporting IEEE 802.3bt Type 4 devices.

Which PoE standards are supported?

The device supports IEEE 802.3bt (Type 4), 802.3at (PoE+), and 802.3af (PoE) standards.