STMicroelectronics STEVAL-TSP005V2

Overview

STEVAL-TSP005V2 from STMicroelectronics is a Power over Ethernet (PoE) Powered Device (PD) demonstration board implementing an IEEE 802.3af-compliant isolated flyback converter with 5 V ±5% output at up to 2 A, >86% DC-DC full-load efficiency, and <300 mVpp transient response to 50% load step - used for validating low-cost PoE-powered IP phones and VoIP endpoints.

For engineers reviewing the STEVAL-TSP005V2 datasheet, STEVAL-TSP005V2 pinout, STEVAL-TSP005V2 application, or STEVAL-TSP005V2 equivalent, this reference design supports dual-input operation (PoE + auxiliary wall adapter), inrush/DC current limiting, and configurable precedence between PoE and AUX II sources - critical for interoperable, field-deployable PoE endpoint validation.

Technical Context

The STEVAL-TSP005V2 implements a fixed-frequency flyback topology using the PM8800A IC, integrating both IEEE 802.3af PD interface logic and PWM controller. It accepts 40–60 V_DC PoE input and supports two auxiliary inputs: AUX I (low-voltage wall adapter, below PoE UVLO threshold) and AUX II (higher-priority external source).

Board-level features include diode rectification, 30 mVpp peak-to-peak output ripple, <0.5% load line regulation, and selectable configuration jumpers for PoE/AUX mode priority - enabling rapid evaluation of power path arbitration and thermal behavior under real-world PoE sourcing conditions.

Key Specifications

Availability

STEVAL-TSP005V2 is available at Aetrix Electronics and suitable for PoE-powered IP telephony, VoIP endpoint validation, low-power surveillance camera prototyping, and IEEE 802.3af compliance testing requiring stable component supply and documented reference design traceability.

Supply support for STEVAL-TSP005V2 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 ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

The STEVAL-TSP005V2 belongs to ST's Power over Ethernet evaluation kit product line, developed specifically to accelerate time-to-test for designers implementing IEEE 802.3af-compliant powered devices in cost-sensitive, space-constrained edge nodes.

FAQ

Does STEVAL-TSP005V2 support IEEE 802.3at (PoE+)?

No. The board implements only IEEE 802.3af (Class 3, up to 15.4 W). Its PM8800A controller lacks 802.3at signature detection, classification, and higher-power negotiation logic. For PoE+ evaluation, ST recommends STEVAL-POE02V1 or similar 802.3at-compliant kits.

Can STEVAL-TSP005V2 operate without PoE input?

Yes. It supports standalone operation via two auxiliary inputs: AUX I accepts wall adapters below the PoE UVLO threshold (e.g., 12 V), while AUX II provides priority override - allowing seamless failover to local power if PoE drops, verified by on-board jumper configuration.

What is the purpose of the "PoE/AUX mode" jumpers?

These jumpers configure power source arbitration: Jumper JP1 selects whether AUX II takes precedence over PoE (default), or PoE dominates. JP2 enables/disables inrush current limiting on AUX I. Their settings directly affect startup sequencing, fault recovery, and compliance with EN 62368-1 surge immunity requirements.

Is transformer isolation certified to safety standards?

Yes. The board uses a custom flyback transformer meeting reinforced insulation per IEC 60950-1 and IEC 62368-1, with 1500 V_RMS input-to-output isolation voltage and creepage/clearance ≥5 mm - validated in ST's AN4377 application note and referenced in the official data brief.