SI3471A-A02-IM

Overview

The SI3471A-A02-IM 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 power settings. It includes intelligent protection mechanisms such as input undervoltage detection, output current limiting, and short-circuit protection. Operating temperatures range from -40°C to +85°C in a QFN-38 surface-mount package.

Feature Summary

• Autonomous PSE operation without requiring a host MCU or programming
• Integrated DC detection algorithm and robust multi-point detection for PD disconnect
• Supports IEEE 802.3bt Type 4 classification for high-power delivery

Applications

• Enterprise and SMB Ethernet switches
• Network cameras and video recorders
• Set-top boxes and network gateways
• Network lighting control systems

Procurement Notes

Verify the specific suffix 'A02' against official Skyworks documentation to confirm pinout and feature variations compared to the 'A01' variant. Ensure the QFN-38 package matches design requirements. Confirm RoHS compliance status through the manufacturer's datasheet before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring single-port 90W PoE++ injection without complex host processing. Compare thermal performance against four-port alternatives like the SI3474 series if space allows. Verify that the 425mA current limit aligns with downstream load requirements and that the 3.3V logic interface is compatible with system controllers.

Part Context

This part belongs to the Skyworks Si347x family of PoE PSE controllers designed for easy integration into Ethernet infrastructure. The family utilizes integrated flash to eliminate external BOM costs and reduce startup time. These devices support both I2C host interfaces and fully autonomous modes, offering flexibility for various network equipment designs.

Replacement Considerations

The SI3471A-A01-IM is a related single-port variant within the same family. Verify functional equivalence regarding detection algorithms and protection features when substituting.