STMicroelectronics STEVAL-POE006V1

Overview

STEVAL-POE006V1 from STMicroelectronics is a reference design evaluation board implementing a 3.3 V, 20 A active clamp forward DC-DC converter with IEEE 802.3bt-compliant Power over Ethernet (PoE) Powered Device (PD) interface. It integrates the PM8805 dual-active-bridge PoE-PD system-in-package and the PM8804 peak-current-mode PWM controller, supporting legacy and high-power 2-pair/4-pair PoE applications up to 90 W.

For engineers reviewing the STEVAL-POE006V1 datasheet, STEVAL-POE006V1 pinout, STEVAL-POE006V1 application, or STEVAL-POE006V1 equivalent, this board serves as a validated hardware platform for rapid prototyping of PoE-powered infrastructure equipment requiring robust 48 V input handling, precise 3.3 V/20 A regulation, and IEEE 802.3bt classification and power negotiation.

Technical Context

The board implements an active clamp forward topology using the PM8804 PWM controller, which provides programmable switching frequency up to 1 MHz, adjustable slope compensation, dual complementary low-side gate drivers, and soft-start/soft-turn-off control. Its current-mode architecture enables tight regulation under dynamic load conditions typical in networked edge devices.

The PM8805 PoE-PD interface handles full IEEE 802.3af/at/bt classification, detection, and handshaking via dual N-channel active bridges (100 V, 0.2 Ω total path resistance), hot-swap MOSFETs, and open-drain T0/T1/T2 status signaling. It auto-detects standard vs. legacy PSE types and supports both 2-pair and 4-pair high-efficiency power delivery.

Key Specifications

Availability

STEVAL-POE006V1 is available at Aetrix Electronics and suitable for wireless access points, industrial IoT gateways, IP cameras, and PoE-powered edge AI accelerators requiring stable component supply, pre-validated compliance, and fast time-to-test.

Supply support for STEVAL-POE006V1 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, analog ICs, power management devices, and silicon solutions for industrial, automotive, and communications markets.

This board belongs to ST's STEVAL (ST Evaluation) series-reference designs built to accelerate development of compliant, high-efficiency power systems for PoE, telecom, and infrastructure applications.

FAQ

What is the maximum input power supported by STEVAL-POE006V1?

The board supports up to 90 W input power per IEEE 802.3bt Type 4 classification, enabled by the PM8805's dual-active-bridge architecture and 100 V, 0.2 Ω path resistance MOSFETs. Input voltage range is 37–57 V, with thermal design validated for continuous 20 A output at 3.3 V.

Does STEVAL-POE006V1 support legacy PoE (802.3af/at) as well as 802.3bt?

Yes. The PM8805 interface automatically detects and negotiates with IEEE 802.3af (15.4 W), 802.3at (30 W), and 802.3bt (60/90 W) PSEs. Classification status is indicated via T0/T1/T2 open-drain signals, and the board operates across all three standards without hardware modification.

Can the output voltage be adjusted to 5 V or 12 V?

No-the board is fixed at 3.3 V output. The feedback network (R122/R104) and compensation components are optimized for that rail. Modifying output voltage requires redesigning the transformer turns ratio, feedback divider, compensation network, and gate drive timing, which voids the reference design validation.

Is STEVAL-POE006V1 RoHS and REACH compliant?

Yes. As a STMicroelectronics evaluation board released in June 2019 (DB3669 Rev 3), it conforms to EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free solder paste, halogen-free laminates, and fully traceable component sourcing per ST's product compliance documentation.