STMicroelectronics STEVAL-TSP001V1

Overview

STEVAL-TSP001V1 from STMicroelectronics is a Power over Ethernet (PoE) demonstration board based on the L6565 controller, designed to deliver isolated DC power and data over standard Ethernet cabling. It complies fully with IEEE 802.3af (2005), provides 12 V @ 0.65 A (7.8 W) and 3.3 V @ 0.65 A (2.145 W), features 1500 V input-output isolation, and measures 5" × 1.5" × 0.65". It targets PoE-powered endpoints such as IP cameras and VoIP phones.

For engineers reviewing the STEVAL-TSP001V1 datasheet, STEVAL-TSP001V1 pinout, STEVAL-TSP001V1 application, or STEVAL-TSP001V1 equivalent, this board serves as a validated reference for IEEE 802.3af-compliant PoE power extraction, isolation architecture validation, dual-output DC-DC conversion, and RJ-45 interface integration in low-power remote devices.

Technical Context

The STEVAL-TSP001V1 implements an active PoE Powered Device (PD) interface using the L6565 quasi-resonant controller, supporting signature detection, classification (Class 3), under-voltage lockout, and thermal protection per IEEE 802.3af. Its flyback topology delivers two regulated outputs with independent feedback loops.

Input operates from 37–57 V DC (PoE midspan/PSE range), with 1500 V basic isolation between Ethernet input and DC outputs. The 3.3 V rail uses tight-tolerance regulation for digital logic supply; the 12 V rail provides looser tolerance for analog or peripheral loads.

Key Specifications

Availability

STEVAL-TSP001V1 is available at Aetrix Electronics and suitable for IP surveillance systems, VoIP telephony infrastructure, wireless access point deployment, and industrial IoT edge nodes requiring stable component supply and IEEE 802.3af validation support.

Supply support for STEVAL-TSP001V1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.

The STEVAL-TSP001V1 belongs to ST's ST evaluation board product line, developed specifically to accelerate design-in of IEEE 802.3af PoE power extraction circuits using ST's proprietary AC-DC and isolated DC-DC controllers.

FAQ

Does STEVAL-TSP001V1 support IEEE 802.3at (PoE+) or 802.3bt?

No. STEVAL-TSP001V1 is strictly IEEE 802.3af-compliant and supports only Class 3 (up to 12.95 W delivered). It lacks the higher-power classification circuitry, extended voltage range, and dual-signature detection required for 802.3at or 802.3bt. Its L6565-based design targets legacy PoE infrastructure.

Can the 12 V and 3.3 V outputs be modified for different voltages?

Yes - output voltages are set by feedback resistor dividers on the secondary side. The board schematic shows configurable FB networks for both rails; changing resistor values allows adjustment within flyback transformer and optocoupler bandwidth limits, subject to re-validation of regulation and load transient response.

Is the RJ-45 connector magnetics integrated or external?

The board uses discrete, through-hole mounted Ethernet magnetics modules (not integrated into the RJ-45 connector). These provide 10/100BASE-TX signal coupling, common-mode choke functionality, and PoE power injection separation - essential for meeting IEEE 802.3af return loss and power insertion loss requirements.

What safety certifications does STEVAL-TSP001V1 hold?

STEVAL-TSP001V1 itself is not a certified end-product but implements designs aligned with IEC 60950-1 / IEC 62368-1 insulation requirements. Its 1500 V isolation barrier, creepage/clearance layout, and transformer construction meet reinforced insulation criteria for SELV secondary circuits when used per ST's application guidance.