SI3474B-A02-IM

Overview

The SI3474B-A02-IM is a Power Sourcing Equipment (PSE) controller designed for IEEE 802.3bt Type 4 applications, supporting up to 90W per port. It manages four independent Ethernet ports with integrated power switches and classification logic. The device operates within a standard voltage range and features an exposed pad package for thermal management. Key electrical characteristics include support for high-power PoE standards and precise current limiting capabilities across all channels.

Feature Summary

• Supports IEEE 802.3bt Type 4 PoE++ standards for high-power delivery
• Integrates four independent power switch channels with classification
• Includes comprehensive protection mechanisms against short circuits and overloads

Applications

• High-power wireless access points requiring 90W per port
• Digital signage displays powered via Ethernet
• IP cameras with heating or lighting functions
• Outdoor IoT sensors needing robust power delivery

Procurement Notes

Verify the specific suffix 'A02' matches your design requirements, as it denotes a specific bin or revision. Confirm the package type is 56-VFQFN Exposed Pad. Check RoHS compliance status in the latest datasheet. Ensure ESD handling procedures are followed during assembly due to moisture sensitivity levels.

Selection Notes

Select this component when designing systems requiring four-port 802.3bt compliance. Compare thermal performance against alternative controllers if space is constrained. Verify that the host microcontroller interface matches the control signals provided by the SI3474B. Consider the need for external components for filtering or timing based on the reference design.

Part Context

Skyworks Solutions offers a portfolio of PoE controllers ranging from legacy 802.3af/at to advanced 802.3bt solutions. The SI3474B series targets enterprise-grade networking equipment. This model represents a multi-channel solution suitable for dense deployment scenarios where individual port power management is critical for network efficiency and safety.

Replacement Considerations

Check Skyworks documentation for direct pin-to-pin replacements within the SI3474 family. Verify compatibility with existing PCB layouts if substituting with similar 56-VFQFN devices. Ensure any alternative supports the same 802.3bt Type 4 power levels.