Monolithic Power Systems Inc. EV8007-V-00C

Overview

EV8007-V-00C from Monolithic Power Systems is an IEEE 802.3af-compliant PoE Powered Device (PD) evaluation board featuring the MP8007 primary-side regulated flyback controller IC. It delivers isolated 12V/1A output from 37–57V PoE input or 24V adapter input, integrates a 180V MOSFET and 100V hot-swap FET, and supports full PD detection, classification, and inrush control for security cameras and VoIP phones.

For engineers reviewing the EV8007-V-00C datasheet, EV8007-V-00C pinout, EV8007-V-00C application, or EV8007-V-00C equivalent, this board enables rapid validation of MP8007's optocoupler-free PSR flyback operation, IEEE 802.3af compliance, thermal protection behavior, and adapter/PoE dual-input prioritization under real load conditions.

Technical Context

The EV8007-V-00C implements a discontinuous conduction mode (DCM) flyback converter using the MP8007 QFN-28 IC, which regulates output voltage via primary-side sensing without optocoupler feedback. It supports dual input sources-IEEE 802.3af PoE (37–57V) and external 24V adapter-with automatic source prioritization.

Key functional blocks include integrated 180V power MOSFET, 80V internal startup circuit, programmable 3A current limit, and comprehensive protection: overvoltage (OVP), overtemperature (OTP), open-loop (OLP), and open-circuit detection. The board uses Wurth 749020011A LAN transformer and Coilcraft CX9629-AL custom flyback transformer.

Key Specifications

Availability

EV8007-V-00C is available at Aetrix Electronics and suitable for PoE-powered security camera deployments, VoIP endpoint development, and WLAN access point prototyping requiring stable component supply, pre-validated compliance, and fast-turn evaluation capability.

Supply support for EV8007-V-00C 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 analog and mixed-signal semiconductor company specializing in high-performance power management ICs, with global design centers and ISO 9001-certified operations.

The MP8007 product line targets IEEE 802.3af PoE PD applications requiring compact, isolated DC/DC conversion with minimal external components and no optocoupler-optimized for cost-sensitive, space-constrained endpoints like IP cameras and VoIP handsets.

FAQ

What input sources does the EV8007-V-00C support?

The board accepts both IEEE 802.3af-compliant PoE (37–57 V) and a 24 V DC adapter. It features automatic input prioritization: when both are present, the adapter powers the system first. This dual-source capability simplifies lab testing and field deployment flexibility.

How is output voltage regulated without an optocoupler?

Regulation uses primary-side sensing via the MP8007's proprietary algorithm that samples reflected auxiliary winding voltage during demagnetization. This eliminates the need for optocouplers or secondary-side TL431 circuits, reducing BOM count and improving reliability in isolated 12 V/1 A designs.

Does the board implement full IEEE 802.3af PD functionality?

Yes-it includes all mandatory PD functions: signature detection (25 kΩ), classification (Class 3), inrush current limiting, operation current limit, and 100 V hot-swap MOSFET control. These are implemented using the MP8007's integrated PD interface, verified per IEEE 802.3af Rev. 3.3.

Can I modify the output voltage?

Yes-the output is set to 12 V by default via the FB resistor divider (R2 = 20 kΩ, R3 = 52.3 kΩ). Adjusting these resistors recalculates the feedback ratio per MP8007's VFB = 1.215 V reference. No hardware changes beyond R2/R3 are required for other outputs within 5–24 V range.

What protections are active during overload or fault conditions?

The board activates multiple protections: overvoltage shutdown (OVP) triggers above 13.2 V, overtemperature shutdown halts switching above 150 °C, open-loop protection disables gate drive if feedback is lost, and overcurrent limits peak primary current to ≤3 A programmable threshold.

Is the LAN transformer included and compliant?

Yes-the board integrates Wurth 749020011A, a 1:1 center-tapped Ethernet magnetics module with integrated common-mode chokes and EMI filtering. It meets IEEE 802.3af requirements for PD-side isolation, surge immunity, and signal integrity up to 100 Mbps.