SI3406-A-GM

Overview

The SI3406-A-GM is a Power over Ethernet (PoE) Powered Device controller designed for IEEE 802.3at Type 2 applications. It integrates a high-voltage power switch and a non-isolated flyback DC-DC converter to deliver up to 25.5W of output power. The device operates with an input voltage range of 2.7V to 57V and supports current limiting at 10.5mA. It functions within a temperature range of -40°C to +85°C and utilizes surface-mount packaging.

Feature Summary

• Integrates a high-voltage power switch with a non-isolated flyback DC-DC converter for efficient power delivery.
• Complies with IEEE 802.3at Type 2 standards for Powered Devices, supporting up to 25.5W output.
• Includes integrated protection features such as thermal shutdown and current limiting.

Applications

• Wireless access points requiring high power budgets
• IP cameras and video surveillance systems
• VoIP telephones and network endpoints

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with your PCB footprint and reflow profile requirements. Confirm RoHS compliance status through the manufacturer's latest environmental declaration before finalizing procurement orders.

Selection Notes

Select this component when designing PoE endpoints requiring Type 2 power levels up to 25.5W. It is suitable for space-constrained designs due to its integrated switch and converter topology. Verify that the application environment stays within the specified operating temperature range of -40°C to +85°C for reliable performance.

Part Context

This part belongs to the Si3406x family of PoE controllers from Skyworks Solutions. It is distinct from the Si3402 series, which supports lower power 802.3af standards. The Si3406-A-GM specifically targets higher-power LAN applications compared to earlier generation or lower-wattage variants in the portfolio.

Replacement Considerations

Consult official Skyworks substitution guides for direct replacements. Evaluate alternative parts based on pinout compatibility and electrical parameter alignment. Do not assume functional equivalence with other manufacturers' components without verifying interface and timing specifications.