Monolithic Power Systems Inc. EV6004-Q-00A

Overview

EV6004-Q-00A from Monolithic Power Systems is a primary-side regulated flyback evaluation board built around the MP6004GQ IC, demonstrating isolated 12V/1A PoE power conversion from 36–72V input. It integrates an 180V MOSFET, operates in DCM with fixed peak current (2.05A), and eliminates optocoupler feedback for simplified BOM and layout in security camera and VoIP phone power supplies.

For engineers reviewing the EV6004-Q-00A datasheet, EV6004-Q-00A pinout, EV6004-Q-00A application, or EV6004-Q-00A equivalent, this board enables rapid validation of MP6004-based primary-side regulation, efficiency testing at 48V input, thermal behavior under 1A load, and EN-controlled enable/disable sequencing in PoE-powered edge devices.

Technical Context

The EV6004-Q-00A implements a discontinuous conduction mode (DCM) flyback topology using the MP6004GQ's internal 180V MOSFET and fixed-peak-current control loop. Regulation relies on primary-side sensing via auxiliary winding feedback (FB1/FB2), eliminating secondary-side optocouplers and TL431 references.

It supports dual power options: self-powered VCC via internal 80V startup circuit and external VCC injection. Protection features include overvoltage (OVP), overload (OLP), open-circuit, and thermal shutdown - all implemented within the MP6004GQ silicon and verified on this board at 48V_IN, 12V_OUT, 1A load.

Key Specifications

Availability

EV6004-Q-00A is available at Aetrix Electronics and suitable for PoE-powered security cameras, VoIP phones, and WLAN access points requiring stable component supply, fast design validation, and production-ready reference schematics.

Supply support for EV6004-Q-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 analog semiconductor company specializing in high-performance power management ICs, including DC-DC converters, LED drivers, and motor drivers for industrial, telecom, and consumer applications.

The MP6004 product line targets cost-sensitive, isolated 12–13W PoE endpoints where primary-side regulation replaces optocoupler-based feedback to reduce bill-of-materials count and improve long-term reliability.

FAQ

What input voltage range is supported, and how is input overvoltage handled?

The EV6004-Q-00A accepts 36–72V DC input, compliant with IEEE 802.3af/at PoE standards. The MP6004GQ IC includes internal overvoltage protection (OVP) that triggers shutdown if V_IN exceeds 80V, safeguarding the board during transient surges or misconfigured lab supplies.

Can the output voltage be adjusted, and what components control it?

Yes, V_OUT is set to 12V by the FB1 (52.3k) and FB2 (20k) resistor divider on the auxiliary winding. Adjusting either resistor changes the feedback ratio and thus output voltage - full recalibration of primary turns ratio and current limit is required for values outside ±10% of nominal.

Does the board support remote enable/disable, and what are the logic thresholds?

Yes, the EN pin accepts TTL/CMOS-compatible signals: drive above 3.9V to enable the MP6004GQ, below 1.3V to disable it. Internal pull-down ensures default-off behavior when EN is floating, supporting safe power sequencing in multi-rail systems.

Is external VCC required, or can the board self-power?

The board can self-power via the MP6004GQ's internal 80V startup LDO and D3/R8 network. Removing D3 and R8 enables external VCC injection (e.g., from a local 12V rail), reducing no-load power consumption but lowering efficiency by ~0.2% at full load.

What thermal performance can be expected at full 1A load?

At 48V_IN/12V_OUT/1A, the MP6004GQ junction temperature rise is ≤25°C above ambient (measured per Rev. 1.01 test report). The QFN-14 package's exposed pad is soldered to a 2-layer 1oz copper PCB with thermal vias, enabling operation up to 65°C ambient without derating.

Are safety certifications (UL/EN62368) pre-validated for this board?

No - the EV6004-Q-00A is an evaluation platform, not a certified end-product. Creepage/clearance meets IPC-2221B Class B guidelines (≥4mm primary-secondary spacing), but final certification requires system-level testing with enclosure, transformer insulation, and production-grade magnetics.