SI3402-B-GM

Overview

The SI3402-B-GM is a single-channel Power over Ethernet (PoE) Powered Device (PD) interface controller compliant with IEEE 802.3af standards. It integrates a DC-DC converter to deliver up to 13W of output power. The device operates within a supply voltage range of 2.8V to 57V and supports a maximum duty cycle of 75%. Key electrical parameters include a maximum on-resistance of 1.3 Ohms, a current limit of 680 mA, and a quiescent operating current of 3.1 mA. It functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Integrates a complete PoE PD interface with an internal DC-DC converter for efficient power delivery.
• Complies with IEEE 802.3af standards for powered device classification and operation.
• Features a compact QFN-20 surface-mount package suitable for space-constrained designs.

Applications

• Powering IP cameras and video surveillance equipment via Ethernet
• Supplying power to wireless access points and VoIP phones
• Enabling power delivery for IoT sensors and edge computing nodes

Procurement Notes

Verify the specific suffix 'GM' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure the procurement channel provides original Skyworks Solutions Inc. components to avoid counterfeit risks. Confirm that the QFN-20 package handling requirements align with your assembly capabilities.

Selection Notes

Select this component when designing systems requiring IEEE 802.3af compliance with integrated power conversion. It is suitable for applications needing a single-channel solution with moderate power output up to 13W. Consider the 1.3 Ohm on-resistance and 680 mA current limit when sizing thermal management solutions for the target environment.

Part Context

The SI3402 belongs to the Si3402 family of PoE controllers designed by Skyworks Solutions. This series focuses on providing integrated solutions for Powered Devices, combining classification logic with power conversion stages. The SI3402-B-GM represents a specific variant within this lineup, optimized for standard 802.3af applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative SKUs only through official Skyworks Solutions cross-reference tools or direct manufacturer consultation.