SI3400-D-GM

Overview

The SI3400-D-GM is a fully integrated IEEE 802.3af-compliant Powered Device (PD) interface and switching regulator designed for Power over Ethernet applications. It features an internal diode bridge circuit, eliminating the need for external components. The device supports input voltages from 44V to 57V and provides a regulated output suitable for various downstream loads. It operates within a temperature range of -40°C to +85°C and is housed in a 20-QFN package.

Feature Summary

• Fully integrated 802.3af compliant PD interface with internal switching regulator
• Built-in diode bridge circuit removes requirement for external rectification components
• Supports non-isolated buck configuration for efficient power conversion

Applications

• VoIP telephone systems
• Wireless access points
• Network surveillance cameras

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific suffix matches project requirements. Review the latest datasheet for any packaging label updates or pinout modifications. Ensure supply chain documentation aligns with current manufacturing standards.

Selection Notes

Select this component for designs requiring high integration and minimal external bill of materials. It is suitable for space-constrained PoE endpoints. Evaluate thermal performance under maximum load conditions. Consider the internal switch topology when designing the output filter stage.

Part Context

This part belongs to the Silicon Labs Si3400 series of PoE controllers. It serves as a foundational solution for implementing IEEE 802.3af powered devices. The series includes variants like the SI3401 and SI3402 for different channel or power configurations.

Replacement Considerations

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