Skyworks Solutions Inc. Si3404 PoE PD Isolated Flyback Evaluation Kits

Skyworks Solutions Inc. Si3404 PoE PD Isolated Flyback Evaluation Kits offer a reference design for a power supply in a Power over Ethernet (PoE) Powered Device (PD) application based on the Si3404 PoE IC. The Si3404 is a highly integrated, IEEE 802.3at Type 1-compliant, Pulse-Width-Modulated (PWM) Switching Regulator. The Si3404 integrates a detection circuit, classification circuit, dc/dc switch, hot-swap switch, TVS overvoltage protection, dynamic soft-start circuit, cycle-by-cycle current limit, thermal shutdown, and inrush current protection.

The Skyworks Si3404 PoE PD Isolated Flyback Evaluation Kits are available in 3.3V/3.5A, 5V/2.5A, and 12V/1A variants. The switching frequency is set to 220kHz by installing R14 = 88.7kΩ.

END-TO-END EFFICIENCY

Chart - Skyworks Solutions Inc. Si3404 PoE PD Isolated Flyback Evaluation Kits

The chart shows the end-to-end EVB efficiency, where voltage drop on the diode bridge is included and LEDs are removed.

Features

IEEE 802.3af compliant
Very small application PCB surface
High efficiency
High integration
Low-profile 4mm x 4mm 20-pin QFN

Integrated thermal shutdown protection
Low BOM cost
Integrated transient overvoltage protection
Equipped with off-the-shelf transformers

Skyworks Solutions Inc. Si3404 PoE PD Isolated Flyback Evaluation Kits

END-TO-END EFFICIENCY

Features

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