Monolithic Power Systems Inc. EV8008-V-00A

Overview

EV8008-V-00A from Monolithic Power Systems is an IEEE 802.3af/at-compliant PoE Powered Device (PD) evaluation board built around the MP8008GV IC. It integrates a PD interface with 100V Hot-swap MOSFET, 120mA inrush current limit, 840mA operation current limit, and a peak-current-mode flyback controller supporting up to 2.1A at 12V output - demonstrated for security camera and WLAN access point power delivery.

For engineers reviewing the EV8008-V-00A datasheet, EV8008-V-00A pinout, EV8008-V-00A application, or EV8008-V-00A equivalent, this board enables rapid validation of PoE-PD front-end design, auxiliary adapter ORing behavior, PSM light-load efficiency, and IEEE Type-2 classification signaling under real 48V input conditions.

Technical Context

The EV8008-V-00A implements a complete PoE-PD reference design using the MP8008GV QFN-28 IC, which embeds both IEEE 802.3af/at detection/classification logic and a programmable-frequency (30–400kHz) flyback PWM controller with cycle-by-cycle current limiting and thermal protection.

It supports dual-input operation: primary power via Ethernet (37–57V), with automatic fallback to a 12V auxiliary adapter connected to APD-GND/VDD; includes dedicated PD Power Good and Type-2 PSE indicator outputs, and uses a Würth 7491194912 transformer plus Vishay SI7430 MOSFET for high-current flyback stage implementation.

Key Specifications

Availability

EV8008-V-00A is available at Aetrix Electronics and suitable for IEEE 802.3af/at PoE-PD development, security camera prototyping, and WLAN access point power architecture validation requiring stable component supply and documented reference performance.

Supply support for EV8008-V-00A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC-DC conversion, PoE interface, motor drivers, and LED lighting controllers.

The MP8008 product line delivers fully integrated PoE-PD front-end solutions combining IEEE-compliant interface and flyback control in a single QFN package - designed specifically for cost-sensitive, space-constrained 802.3af/at endpoints like IP cameras and VoIP phones.

FAQ

What is the primary function of the EV8008-V-00A evaluation board?

The EV8008-V-00A is a functional demonstration platform for the MP8008GV IC, validating full IEEE 802.3af/at PoE Powered Device operation - including detection, classification, inrush control, Hot-swap MOSFET switching, and regulated 12V/2.1A flyback power conversion from Ethernet input or auxiliary 12V adapter.

Can the EV8008-V-00A operate without an Ethernet PSE source?

Yes - the board supports auxiliary 12V adapter input via APD-GND and VDD terminals, enabling standalone testing without PoE infrastructure. The MP8008GV automatically prioritizes the adapter when present, and seamlessly transitions to PoE power if the adapter is removed while powered.

What protections are implemented on the EV8008-V-00A board?

The board inherits all MP8008GV protections: overvoltage, overcurrent, short-circuit, and thermal shutdown on the flyback output; plus IEEE-compliant PD inrush and operating current limiting; and TVS diode (SMAJ58A) protection on the Ethernet input lines against surge transients.

Does the EV8008-V-00A support IEEE 802.3at Type 2 classification?

Yes - the MP8008GV on this board implements full Type 2 (up to 25.5W) classification per IEEE 802.3at, signaled via the PD Power Good and Type-2 PSE Indicator pins, and verified through resistor-based classification circuitry matching Class 4 specifications.

What is the role of the Würth 7491194912 transformer on this board?

The Würth 7491194912 is a custom-designed power-stage transformer optimized for the MP8008GV's peak-current-mode flyback topology, providing 1:10 turns ratio, 0.1μH primary inductance, and 12A saturation current - enabling efficient 12V/2.1A output with minimal external components.

How is load regulation validated on the EV8008-V-00A?

Load regulation is verified per test report (Rev. 1.0, p.6–7): at 48V input and 25°C, output voltage remains within ±2% across 0–2.1A load range, with ripple <100mVpp measured at 12V/2.1A, confirming stable regulation under full-rated PoE-PD power delivery conditions.