STMicroelectronics STEVAL-TSP006V2

Overview

STEVAL-TSP006V2 from STMicroelectronics is a Power over Ethernet (PoE) Powered Device (PD) demonstration board based on the PM8800A IC, implementing an IEEE 802.3af-compliant isolated flyback converter delivering 3.3 V at up to 3 A from 40–60 V_DC PoE input or auxiliary sources. It supports dual-input operation (AUX I and AUX II), achieves >83% DC-DC full-load efficiency, and maintains <400 mV_pp output voltage deviation under 50% load transients.

For engineers reviewing the STEVAL-TSP006V2 datasheet, STEVAL-TSP006V2 application, STEVAL-TSP006V2 reference design, or STEVAL-TSP006V2 alternative evaluation boards, this kit provides validated hardware for rapid prototyping of low-cost, single-output PoE-powered embedded systems requiring stable 3.3 V/3 A rail with auxiliary source fallback capability.

Technical Context

The STEVAL-TSP006V2 implements an isolated flyback topology using the PM8800A, which integrates both the IEEE 802.3af PD interface (detection, classification, inrush control, UVLO) and a primary-side PWM controller with internal high-voltage switch. It supports diode rectification and operates across the full 40–60 V_DC PoE voltage range while maintaining tight output regulation (±5%).

Auxiliary inputs are implemented via two dedicated connectors: AUX I accepts wall adapters below the PoE UVLO threshold and retains inrush/DC current limiting, while AUX II enables priority switchover to external power. The board supports configuration options for isolated/non-isolated and single/dual outputs - though only the 3.3 V/3 A flyback variant is populated and validated per the reference design.

Key Specifications

Availability

STEVAL-TSP006V2 is available at Aetrix Electronics and suitable for PoE-powered IP cameras, VoIP endpoints, industrial IoT sensors, and smart building controllers requiring stable component supply and fast time-to-demonstration.

Supply support for STEVAL-TSP006V2 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, designing and manufacturing microcontrollers, power management ICs, analog devices, and silicon solutions for industrial, automotive, and consumer markets.

The STEVAL-TSP006V2 belongs to ST's Power over Ethernet evaluation platform family, engineered to accelerate development of IEEE 802.3af-compliant powered devices with integrated PD interface and DC-DC conversion in cost-sensitive, space-constrained applications.

FAQ

What is the primary function of the STEVAL-TSP006V2?

The STEVAL-TSP006V2 is a fully assembled and tested reference design board that demonstrates the PM8800A IC's capability to implement an IEEE 802.3af-compliant Powered Device interface with an isolated 3.3 V/3 A flyback converter. It is not a production-ready module but a validation tool for evaluating PoE power extraction, auxiliary source integration, and transient behavior under real-world load conditions.

Does the board support both PoE and auxiliary power simultaneously?

No - the board supports either PoE or auxiliary input at a time, with configurable priority. AUX II connector provides precedence over PoE, while AUX I operates below the PoE UVLO threshold (typically <36 V) and retains built-in inrush and DC current limiting. Simultaneous sourcing is not supported; the design uses OR-ing logic via discrete components to select the active input path.

Can the output voltage be adjusted to 5 V or other values?

No - the STEVAL-TSP006V2 is fixed at 3.3 V output by its transformer turns ratio, feedback resistor network, and PM8800A configuration. While the underlying PM8800A supports adjustable outputs via external resistors and transformer redesign, this specific board has no onboard provisions for voltage reconfiguration; changing output requires PCB-level modifications and revalidation.

Is the STEVAL-TSP006V2 compliant with IEEE 802.3at (PoE+) or 802.3bt?

No - it is strictly IEEE 802.3af (Type 1, up to 15.4 W) compliant. The PM8800A does not support higher-power detection signatures, classification classes, or autoclass functionality required for 802.3at or 802.3bt. Its input stage is rated for 40–60 V_DC, matching only the af standard; operation above 60 V or with multi-event classification is not supported.