Skyworks Solutions Inc. SI34061ISOC4-KIT

Overview

SI34061ISOC4-KIT from Skyworks Solutions is an evaluation kit for the Si34061-A-GM IEEE 802.3at-compliant PoE+ powered device (PD) controller IC, featuring integrated hot-swap switch, current-mode DC-DC converter, synchronous rectifier driver, and auxiliary transformer winding support. It enables rapid prototyping of isolated flyback PoE+ PD designs delivering up to 30 W output with <1 Ω internal switching FET and tunable 100–500 kHz switching frequency.

For engineers reviewing the SI34061ISOC4-KIT datasheet, SI34061ISOC4-KIT application, SI34061ISOC4-KIT pinout, or SI34061ISOC4-KIT equivalent, this kit provides validated reference design implementation, thermal performance characterization, and sleep/wake/LED control validation for IP cameras, wireless access points, and VoIP terminals requiring IEEE 802.3at Type 2 compliance and high-efficiency power conversion.

Technical Context

The SI34061ISOC4-KIT implements a complete isolated flyback PoE+ PD solution based on the Si34061-A-GM IC, integrating diode bridge interface, surge/telephony protection, detection/classification circuitry, and maintain-power-signature (MPS) generation. It supports dual-event classification per IEEE 802.3at and uses external resistors (RDET, RCLASS) to configure detection resistance (~25 kΩ) and classification current.

This kit validates the Si34061's auxiliary transformer bias winding (VT15) support for ultra-high-efficiency operation, synchronous secondary FET driver (SYNCL), and external hotswap FET control (EXTHSW) for Class 4 thermal management. The board includes RFREQ resistor tuning for EMI optimization and ASUP input for 12–57 V wall adapter backup operation.

Key Specifications

Availability

SI34061ISOC4-KIT is available at Aetrix Electronics and suitable for PoE+ evaluation, isolated flyback reference design validation, and IEEE 802.3at compliance testing requiring stable component supply, full documentation access, and technical support for production ramp-up.

Supply support for SI34061ISOC4-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 wireless, broadband, automotive, and industrial markets.

The Si3406x product line is designed specifically for Power-over-Ethernet powered devices, integrating all required PD interface and power conversion functions into compact QFN packages to minimize external BOM and PCB footprint.

FAQ

What is the primary function of the SI34061ISOC4-KIT?

The SI34061ISOC4-KIT is an evaluation kit for the Si34061-A-GM PoE+ PD controller IC. It provides a fully assembled and tested isolated flyback reference design that demonstrates IEEE 802.3at compliance, including detection, classification, hot-swap control, and high-efficiency DC-DC conversion. Engineers use the SI34061ISOC4-KIT to validate system-level performance, measure thermal behavior, and accelerate time-to-market for PoE-powered devices such as IP cameras and wireless access points.

Does the SI34061ISOC4-KIT support both PoE and wall adapter input?

Yes, the SI34061ISOC4-KIT supports dual-input operation via the ASUP pin, accepting 12–57 V DC from an external wall adapter while maintaining full IEEE 802.3at functionality. This enables seamless fallback or parallel operation with PoE input, validated in the kit's schematic and bill of materials. The SI34061ISOC4-KIT implements automatic source selection logic consistent with the Si34061-A-GM's ASUP mode specification.

Can the SI34061ISOC4-KIT be used to evaluate sleep and wake functionality?

Yes, the SI34061ISOC4-KIT includes dedicated test points and jumpers for nSLEEP, WAKE, and MODE pins, enabling full validation of the Si34061-A-GM's consumption-based sleep mode, manual sleep initiation, and wake-on-event capability. The kit's firmware and hardware design implement the exact timing and latching behavior described in the Si3406x datasheet Section 2.9, allowing direct measurement of standby current and MPS pulse generation during sleep states.

What topologies does the SI34061ISOC4-KIT demonstrate?

The SI34061ISOC4-KIT implements an isolated flyback topology using the Si34061-A-GM's EROUT feedback path, VT15 auxiliary winding support, and SYNCL-driven synchronous rectifier. It validates transformer turns ratio selection, snubber design, and loop compensation for 30 W output. The kit does not implement buck or non-isolated flyback configurations - those require separate reference designs aligned with Si34061-A-GM's FBL/FBH pin usage.

Is external hotswap FET support demonstrated in the SI34061ISOC4-KIT?

Yes, the SI34061ISOC4-KIT includes the EXTHSW pin routed to a test point and configured to drive an external N-channel MOSFET, validating the Si34061-A-GM's external hotswap FET control feature for Class 4 applications. The board layout and schematic follow Skyworks' AN1130 guidelines, ensuring proper gate drive timing, inrush limiting, and MPS coordination between internal and external switches - critical for thermal management above 25.5 W.