SI3471A-A01-IMR

Overview

The SI3471A-A01-IMR is a single-port Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3bt Type 4 standards, delivering up to 90W per port. It operates on a 3.3V supply voltage and features an integrated current limit of 425mA. The device supports autonomous operation without a host microcontroller, utilizing configuration pins for setup. It functions within a temperature range of -40°C to +85°C and is housed in a QFN-38 surface-mount package.

Feature Summary

• Autonomous operation capability eliminating the need for external host processors or microcontrollers
• Integrated detection algorithms including DC detection and multi-point detection for Powered Device identification
• Comprehensive protection mechanisms featuring input undervoltage detection, output current limiting, and short-circuit protection

Applications

• Midspan power injection units for Ethernet networks
• PoE injectors supporting high-power devices
• Enterprise network infrastructure requiring 90W per port delivery

Procurement Notes

Verify the specific suffix IMR indicates reel packaging when sourcing. Confirm RoHS compliance status through official Skyworks documentation. Ensure the ordering part number matches the required tape and reel quantity specifications for manufacturing integration.

Selection Notes

Select this component for designs requiring single-port 90W PoE++ support without MCU overhead. Compare against Si3474A for multi-port requirements. Validate thermal management needs for QFN-38 packages under full load conditions.

Part Context

Part of the Skyworks Si347x family of PoE PSE controllers. Designed to simplify integration of high-power Ethernet供电 into switches and midspans by reducing bill of materials through integrated flash and control logic.

Replacement Considerations

Si3471A-A01-IM is the tray-packaged equivalent of the same functional device.