Monolithic Power Systems Inc. EV8007H-V-00A

Overview

EV8007H-V-00A from Monolithic Power Systems is an IEEE 802.3af-compliant PoE Powered Device (PD) evaluation board built around the MP8007H primary-side regulated flyback controller. It delivers 12 V / 11 W output from 37–57 V PoE input or 24 V auxiliary adapter, integrates a 180 V MOSFET, supports DCM operation, and includes full PD interface functions (detection, classification, inrush control, hot-swap). It targets isolated 13 W PoE applications such as security cameras.

For engineers reviewing the EV8007H-V-00A datasheet, EV8007H-V-00A pinout, EV8007H-V-00A application, or EV8007H-V-00A equivalent, this board enables rapid validation of MP8007H-based primary-side regulated flyback designs for IEEE 802.3af PDs - especially where optocoupler-free regulation, thermal protection, and dual-input (PoE + adapter) capability are required.

Technical Context

The EV8007H-V-00A implements a discontinuous conduction mode (DCM) flyback converter with fixed peak current and variable frequency control, achieving primary-side regulation without optocoupler feedback. Its PD interface complies fully with IEEE 802.3af detection (15–25 V threshold), classification (Class 3), and hot-swap (100 V MOSFET) requirements.

The board supports dual power sources: PoE input via RJ45 jack (J1) and 24 V auxiliary adapter input (VDD/ADP_GND). Output voltage is fixed at 12 V with ±0.6% load regulation and ±0.6% line regulation across 36–57 V input and 0–0.92 A load range.

Key Specifications

Availability

EV8007H-V-00A is available at Aetrix Electronics and suitable for security camera deployments, VoIP phone development, WLAN access point prototyping, and other IEEE 802.3af-powered device designs requiring stable component supply, fast time-to-test, and production-ready reference implementation.

Supply support for EV8007H-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 power management ICs, including DC/DC converters, LED drivers, motor drivers, and PoE solutions - with emphasis on integration, efficiency, and reliability.

The EV8007H-V-00A belongs to MPS's PoE evaluation platform family, designed specifically to accelerate development of IEEE 802.3af-compliant powered devices using their proprietary primary-side regulated flyback controllers like the MP8007H.

FAQ

What input power sources does the EV8007H-V-00A support?

The board accepts two independent input sources: IEEE 802.3af-compliant PoE (37–57 V) via the RJ45 Ethernet jack (J1), and a 24 V auxiliary adapter connected to VDD and ADP_GND terminals. Both inputs are mutually exclusive and automatically prioritized - PoE takes precedence when present.

Does the EV8007H-V-00A require an optocoupler for output regulation?

No. The board implements primary-side regulation using the MP8007H's internal sensing architecture, eliminating the need for optocouplers, TL431, or secondary-side feedback circuitry. Regulation accuracy is maintained at ±0.6% across line and load variations.

What protection features are implemented on this evaluation board?

All protections are handled by the MP8007H IC: overload protection (SCP), overvoltage protection (OVP), open-circuit protection (triggered by FB1 shorting), and thermal shutdown. These are hardware-based, cycle-by-cycle, and require no external configuration or supervision.

Can the output voltage be adjusted, and if so, how?

The output voltage is factory-set to 12 V via resistor divider R1/R2 (52.3 kΩ / 20 kΩ) on the FB1 pin. To change it, replace R1 and/or R2 per MP8007H's FB voltage equation (VFB = 2.5 V); the board layout accommodates standard 0603 resistors for easy reconfiguration.

Is the EV8007H-V-00A RoHS and halogen-free compliant?

Yes. All components on the board - including the MP8007H QFN-28 IC, passive elements, and connectors - are lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status for this part on its official Quality Assurance page.

What is the maximum achievable efficiency, and under what conditions?

Peak efficiency reaches 89% at 48 V input and 0.75 A load (9 W), per test data on page 6 of the reference design document. Efficiency remains above 85% from 25% to 100% load across 36–57 V input, validating suitability for thermally constrained PoE endpoints.