SI3471A-A01-IM

Overview

The SI3471A-A01-IM is a fully autonomous Power Sourcing Equipment (PSE) controller designed for single-port IEEE 802.3bt PoE applications. It delivers up to 90W of power on a single Ethernet port without requiring a host microcontroller. The device integrates PD detection, classification, and disconnect algorithms. Key electrical parameters include a current limit of 425 mA, an operating supply voltage of 3.3 V, and an operational temperature range from -40°C to +85°C. It is housed in a QFN-38 package suitable for surface mount installation.

Feature Summary

• Autonomous operation eliminates the need for external host processors or microcontrollers.
• Integrates intelligent protection circuits including input undervoltage detection and output short-circuit protection.
• Supports configurable maximum power output via static I/O pin configuration.
• Includes built-in LED driver functionality for status indication.

Applications

• Enterprise and SMB Ethernet switches
• Network video surveillance systems
• Mid-span PoE injectors

Procurement Notes

Verify the specific suffix 'A01' against the manufacturer's latest datasheet to confirm exact binning or revision details. Ensure the QFN-38 package dimensions match your PCB footprint requirements. Confirm RoHS compliance status with the supplier prior to ordering. Validate that the 3.3V supply voltage aligns with your system design constraints.

Selection Notes

Select this component for designs requiring high-power delivery up to 90W on a single port under the 802.3bt standard. It is suitable for space-constrained applications due to its integrated architecture. Consider thermal management strategies as it supports external FETs for improved heat dissipation. Compare with multi-port variants like the Si3474 if multiple ports are required.

Part Context

This part belongs to the Skyworks Si347x family of PoE PSE controllers. The family includes single-port (Si3471), quad-port (Si3474), and octal-port (Si3473) devices. These components share common features such as integrated flash memory and support for various detection algorithms. They are designed to simplify PoE implementation by reducing external component counts.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Skyworks resources for cross-reference information. Verify compatibility with existing firmware or hardware configurations if considering alternative models within the same product family.