Skyworks Solutions Inc. SI3406FBC3-KIT

Overview

SI3406FBC3-KIT from Skyworks Solutions is an evaluation kit for the Si34062-A-GM IEEE 802.3at-compliant PoE+ powered device (PD) controller, integrating hot-swap control, current-mode DC-DC regulation, synchronous rectification driver, sleep/wake logic, and LED drive functionality in a 24-pin QFN package. It supports isolated/non-isolated flyback topologies, tunable 100–500 kHz switching frequency, auxiliary transformer bias winding, and 12–57 V wall adapter backup.

For engineers reviewing the SI3406FBC3-KIT datasheet, SI3406FBC3-KIT pinout, SI3406FBC3-KIT application, or SI3406FBC3-KIT equivalent, this kit enables rapid validation of PoE+ PD designs for IP phones, surveillance cameras, and wireless access points - with full support for IEEE 802.3at two-event classification, automated maintain-power-signature (MPS), and low-standby-current sleep mode with wake pin and LED status indication.

Technical Context

The SI3406FBC3-KIT implements the Si34062-A-GM IC, which integrates a 120 V absolute max-rated PoE line interface with internal diode bridges and surge protection, a current-mode PWM controller with programmable oscillator (RFREQ), and dual error amplifiers supporting high-side (FBH) or low-side (FBL) feedback. It features dedicated pins for nSLEEP, WAKE, and MODE to manage state transitions and LED output.

This kit demonstrates the Si34062's unique capability to enter latched sleep mode on a negative edge at nSLEEP while preserving MODE state, enabling MPS generation only when MODE = 0 - critical for battery-backed or low-power remote devices requiring deterministic wake behavior and visual status signaling via the LED pin.

Key Specifications

Availability

SI3406FBC3-KIT is available at Aetrix Electronics and suitable for PoE-powered IP telephones, security IP cameras, wireless access points, and network lighting luminaires requiring stable component supply, reference design validation, and production-ready layout verification.

Supply support for SI3406FBC3-KIT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for infrastructure, automotive, and IoT applications.

The Si3406x product line delivers fully integrated PoE+ PD controllers targeting cost-sensitive, space-constrained endpoints needing high-efficiency power conversion, robust surge/telephony protection, and intelligent power management - especially where sleep/wake autonomy and LED status are required.

FAQ

What is the primary function of the SI3406FBC3-KIT?

The SI3406FBC3-KIT is an evaluation kit for the Si34062-A-GM PoE+ PD controller IC. It enables engineers to validate full IEEE 802.3at-compliant operation - including detection, classification, hot-swap control, DC-DC conversion, sleep/wake sequencing, and LED status indication - using reference schematics and layout files provided by Skyworks. The SI3406FBC3-KIT itself is not a production component but a hardware platform for design verification.

Does the SI3406FBC3-KIT include the Si34062-A-GM IC?

Yes, the SI3406FBC3-KIT contains the Si34062-A-GM IC mounted on a populated PCB. This IC integrates all core PoE+ PD functions: IEEE 802.3at line interface with internal diode bridges and surge protection, current-mode DC-DC controller with tunable frequency, synchronous FET driver, auxiliary winding support (VT15), and dedicated sleep/wake/LED control pins - matching the exact functionality documented in the Si3406x Family Data Sheet.

Can the SI3406FBC3-KIT be used to evaluate both isolated and non-isolated topologies?

Yes, the SI3406FBC3-KIT supports both isolated flyback and non-isolated buck/flyback configurations. Its reference design accommodates high-side (FBH) or low-side (FBL) feedback, and the EROUT pin enables voltage-to-current conversion for optocoupler-based isolated loop compensation. The kit's schematic and layout follow Skyworks' AN1130 guidelines for both topology types, allowing direct comparison of efficiency, transient response, and footprint trade-offs.

How does the SI3406FBC3-KIT demonstrate the Si34062's special sleep mode?

The SI3406FBC3-KIT implements the Si34062's latched sleep mode using physical pushbuttons tied to nSLEEP, WAKE, and MODE pins. A negative edge on nSLEEP initiates sleep, freezing the MODE state to determine whether MPS generation remains active. The LED pin illuminates during active operation and dims or blinks per firmware-defined status - validating the hardware-enforced sleep/wake behavior described in Section 2.9 of the Si3406x Family Data Sheet.

Is wall adapter (ASUP) support demonstrated on the SI3406FBC3-KIT?

Yes, the SI3406FBC3-KIT includes provisions for auxiliary 12–57 V wall adapter input via the ASUP pin, as specified in Section 2.10 of the Si3406x Family Data Sheet. The board routes ASUP through a 100 kΩ resistor and 10 nF capacitor to enable seamless switchover between PoE and wall adapter sources - validating dual-input operation without manual reconfiguration or external OR-ing circuitry.