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Skyworks Solutions Inc. SI3402BISO-EVB
- Part No.:
- SI3402BISO-EVB
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- Datasheet:
-
SI3402BISO-EVB.pdf
- Description:
- EVAL BOARD FOR SI3402B
- Quantity:
- Payment:
- Shipping:
Inventory:2,241
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Product details
Overview
SI3402BISO-EVB from Skyworks Solutions is an isolated evaluation board designed for the Si3402B Power over Ethernet (PoE) Powered Device (PD) controller IC, supporting IEEE 802.3-2015-compliant Class 3 operation with configurable +3.3 V, +5 V, +9 V, or +12 V output. It implements a flyback topology with external Schottky diode bridge bypass capability and integrates feedback compensation optimized for standard and low-ESR output capacitors.
For engineers reviewing the SI3402BISO-EVB datasheet, SI3402BISO-EVB pinout, SI3402BISO-EVB application, or SI3402BISO-EVB equivalent, this board serves as a reference design for PoE PD power supply development - especially where galvanic isolation, robust ESD immunity (IEC 61000-4-2 >15 kV), and thermal management of >7 W loads are required.
Technical Context
The SI3402BISO-EVB implements an isolated flyback converter using the Si3402B controller IC, which integrates primary-side sensing, synchronous rectification control, and IEEE 802.3af/at signature generation. It accepts PoE input via RJ-45 (J1) across either spare-pair (pins 4,5 & 7,8) or data-pair (pins 1,2 & 3,6) configurations and delivers regulated DC output at J11 (+) and J12 (–).
Board-level features include configurable classification (Class 0–3 via R3), selectable output voltage via feedback resistor network (R5/R6), optional external Schottky diode bridge (D8–D15) for >7 W operation, and layout-optimized thermal vias under the Si3402B's VNEG pad for enhanced heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Target IC | Si3402B QFN20N5X5P0.8 PoE PD controller with integrated high-voltage startup, PWM control, and Class detection |
| Topology | Isolated flyback with primary-side regulation and external synchronous rectifier control |
| Input Compatibility | IEEE 802.3-2015-compliant PSE (e.g., Trendnet TPE-1020WS); supports both data-pair and spare-pair powering |
| Output Voltage Range | Configurable to +3.3 V, +5 V, +9 V, or +12 V via feedback resistors (R5/R6) and TLV431 shunt reference |
| Power Class Support | Preconfigured for Class 3 (≤25.5 W); reconfigurable to Class 0–2 via R3 value per Table 3 |
| ESD Protection | Integrated 1 nF/100 V X7R capacitors (C10–C17) on transformer secondary side for IEC 61000-4-2 ≥15 kV system-level immunity |
| Thermal Management | VNEG pad connected to backside thermal plane via ≥1 inch² copper area with 1–1.2 mm pitch thermal vias (0.3–0.33 mm diameter) |
Availability
SI3402BISO-EVB is available at Aetrix Electronics and suitable for PoE-powered IP cameras, VoIP phones, wireless access points, and IoT edge nodes requiring stable component supply, rapid prototyping validation, and production-ready reference design fidelity.
Supply support for SI3402BISO-EVB 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 applications.
The Si3402BISO-EVB belongs to Skyworks' Power over Ethernet evaluation platform family, engineered to accelerate development of isolated, standards-compliant PD power supplies for enterprise and industrial infrastructure equipment.
FAQ
What is the primary function of the SI3402BISO-EVB?
The SI3402BISO-EVB is an isolated evaluation board for the Si3402B PoE PD controller IC. It demonstrates a complete, IEEE 802.3-2015-compliant isolated flyback power supply capable of delivering up to Class 3 power (≤25.5 W) with configurable output voltages. The SI3402BISO-EVB enables functional validation, layout verification, and thermal characterization before custom PD design.
Can the SI3402BISO-EVB be used with non-isolated PoE topologies?
No - the SI3402BISO-EVB is specifically designed for isolated flyback operation using the Si3402B's internal gate drivers and primary-side sensing architecture. For non-isolated applications, Skyworks provides the separate Si3402B-EVB reference design. The SI3402BISO-EVB does not support buck, forward, or active clamp topologies.
How is output voltage configured on the SI3402BISO-EVB?
Output voltage is set by the feedback resistor divider network (R5 and R6) connected to the FB pin of the Si3402B and the cathode of the TLV431 shunt reference (U3). Values are selected per Table 2: e.g., 36.5 kΩ (R5) and 12.1 kΩ (R6) configure +5 V output. The SI3402BISO-EVB ships preconfigured for +5 V but supports +3.3 V, +9 V, and +12 V with component changes.
Does the SI3402BISO-EVB support hot-swap or auxiliary power inputs?
The SI3402BISO-EVB does not include an AUX input circuit. While the underlying Si3402B IC supports auxiliary power mode (per AN956), the SI3402BISO-EVB board is implemented exclusively for PoE-only operation. No AUX supply connector or surge-limiting resistor (e.g., 3 Ω series) is populated - use of AUX requires custom modification beyond the SI3402BISO-EVB baseline design.
What transformer is used on the SI3402BISO-EVB, and is it interchangeable?
The SI3402BISO-EVB uses the Coilcraft FA2924 (EP13 core) 10:3 turns-ratio Ethernet transformer, optimized for Class 3 operation. Table 2 lists alternatives including FA2671 (for 3.3 V/5 V) and FA2672/FA2805 (for 9 V/12 V). Interchangeability requires matching turns ratio, isolation rating (>1500 Vrms), and saturation current - direct substitution without revalidation is not recommended.
SI3402BISO-EVB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- Special Purpose DC/DC, Power Over Ethernet
- Outputs and Type:
- 1 Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 5V
- Voltage - Input:
- -
- Regulator Topology:
- 44V ~ 57V
- Frequency - Switching:
- Flyback
- Contents:
- 350kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- Si3402-B
SI3402BISO-EVB FAQ
1.How can I place an order for SI3402BISO-EVB through Aetrix?
Please submit a Request for Quotation (RFQ) for SI3402BISO-EVB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI3402BISO-EVB reliable?
The price and inventory of SI3402BISO-EVB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI3402BISO-EVB is usually 5 days.
3.What payment methods are accepted for SI3402BISO-EVB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI3402BISO-EVB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI3402BISO-EVB?
SI3402BISO-EVB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI3402BISO-EVB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI3402BISO-EVB?
For technical support, including SI3402BISO-EVB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI3402BISO-EVB requirements.
6.How does Aetrix verify that SI3402BISO-EVB is sourced from the original manufacturer or authorized distributors?
All SI3402BISO-EVB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI3402BISO-EVB meets industry standards.
7.What is the process for return or replacement of SI3402BISO-EVB?
All SI3402BISO-EVB units undergo pre-shipment inspection (PSI). If there is an issue with SI3402BISO-EVB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI3402BISO-EVB part is unused and in its original packaging.
Return procedure for SI3402BISO-EVB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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