Skyworks Solutions Inc. SI3404B12V3KIT 12V Class 3 PoE PD Evaluation Kit

Skyworks Solutions SI3404B12V3KIT 12V Class 3 PoE PD Evaluation Kit provides a reference design for a power supply in a Power over Ethernet (PoE) Powered Device (PD) application, based on the Si3404 PoE IC. Skyworks Si3404 is a highly integrated, IEEE 802.3at Type 1-compliant, Pulse-Width-Modulated (PWM) Switching Regulator. The Si3404 integrates all power management and control functions required in a Power-over-Ethernet application.

The SI3404B12V3KIT Evaluation Kit features a complete buck converter reference circuit, with a single Si3404 managing the PoE interface and DC-DC conversion. The buck converter circuit outputs up to 1.25A at 12V, for a total power of 7W. The Evaluation Kit is also offered in 3.3V/2.1A, 5V/1.4A, and 24V/0.625A variants.

The Evaluation Kit is shipped with silicon type diode bridges installed. If higher efficiency is needed, the silicon type diodes can be replaced with Schottky diodes.

End-to-End Efficiency

Performance Graph - Skyworks Solutions Inc. SI3404B12V3KIT 12V Class 3 PoE PD Evaluation Kit

The chart shows end-to-end efficiency. The voltage drop of the diode bridge is included. LEDs are removed.

Features

Si3404 is offered in a low-profile, 4mm x 4mm QFN-20 package
Fully 802.3at/af compliant
15W buck converter
12V, 1.25A output

Up to 85.9% efficiency
Very small application PCB surface
Integrated transient overvoltage protection
EN 55032 class B conducted and radiated EMI compliant

Documents

Evaluation Kit User Guide

Si3404/06x PoE-PD Controller Design Guide

Skyworks Solutions Inc. SI3404B12V3KIT 12V Class 3 PoE PD Evaluation Kit

End-to-End Efficiency

Features

Documents

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