SI3402-C-GM

Overview

The SI3402-C-GM is a single-channel Power over Ethernet (PoE) Powered Device interface integrated circuit compliant with IEEE 802.3at and 802.3af standards. It integrates a DC-DC converter to provide efficient power delivery. The device operates within a supply voltage range of 2.8V to 57V and supports a maximum output power of 15W. It features an internal switch with a current limit of 680 mA and draws 2 mA in operating mode. Designed for surface mount installation, it is housed in a 20-QFN (5x5 mm) package.

Feature Summary

• Integrates PoE PD interface logic with an on-board DC-DC converter
• Supports both 802.3at (PoE+) and 802.3af (PoE) classification protocols
• Includes internal high-side switch for load protection

Applications

• VoIP telephones requiring PoE power input
• Wireless LAN access points
• Network surveillance cameras
• IoT edge devices powered via Ethernet

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm packaging configuration. The base part number may correspond to tray or tape-and-reel variants. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the source document explicitly lists the SI3402-C-GM designation to avoid confusion with the reel-packaged SI3402-C-GMR variant.

Selection Notes

Select this component when a compact solution combining PoE classification and DC-DC conversion is required. It is suitable for designs needing support for both legacy 802.3af and higher-power 802.3at standards. Consider the 20-QFN footprint constraints and thermal requirements associated with 15W power dissipation in the final layout.

Part Context

This IC belongs to the Si3402 series of PoE controllers manufactured by Skyworks Solutions Inc. The series provides integrated solutions for powering networked endpoints without external transformers. The C-grade designation typically indicates specific electrical performance characteristics within the product family line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.