SI3471A-A02-IMR

Overview

The SI3471A-A02-IMR is a Power Sourcing Equipment (PSE) controller from Skyworks Solutions, designed for IEEE 802.3bt Type 3 and Type 4 applications. It supports up to 90W power delivery over a single Ethernet port. The device integrates PD detection, classification, and power switching functions. Operating voltage ranges from 3.3V, with current limits specified at 425mA. It operates within a temperature range of -40°C to +85°C and utilizes a QFN-38 package.

Feature Summary

• Autonomous operation without requiring a host microcontroller or MCU programming
• Integrated DC detection algorithm and robust multi-point detection for PD disconnect
• Compliance with IEEE 802.3bt standards for high-power PoE applications

Applications

• PoE midspan injectors supporting 90W output
• Power sourcing equipment for 802.3bt Type 3 endpoints
• Power sourcing equipment for 802.3bt Type 4 endpoints

Procurement Notes

Verify the specific suffix A02 against official Skyworks documentation to confirm pinout and feature set compatibility. Check moisture sensitivity levels and reflow soldering profiles prior to assembly. Ensure supply chain sources provide valid RoHS compliance data. Confirm availability status as distribution channels may report limited stock or restricted sales regions.

Selection Notes

Select this component for single-port 90W PoE implementations requiring autonomous control. Compare against SI3471A-A01-IMR if different configuration options are needed. Consider thermal management requirements due to high power density in the QFN-38 package. Validate interface compatibility with downstream DC-DC converters for powered devices.

Part Context

This part belongs to the Si3471 family of PoE PSE controllers. It complements other Skyworks solutions like the Si34071 PD interface. The series focuses on simplifying 802.3bt design by integrating detection and classification logic. It serves as a key building block for modern high-power network infrastructure.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Skyworks Solutions directly for qualified alternatives or obsolescence notices.