Monolithic Power Systems Inc. EVL8017-L-00A

Overview

EVL8017-L-00A from Monolithic Power Systems is an IEEE 802.3af-compliant PoE powered device (PD) evaluation board for the MP8017 IC, integrating active-clamp flyback converter with primary- or secondary-side regulation, 100V hot-swap MOSFET, 0.37Ω/0.75Ω internal FETs, and QFN-19 (3mm×4mm) package - designed for 13W isolated PoE applications including security cameras and VoIP phones.

For engineers reviewing the EVL8017-L-00A datasheet, EVL8017-L-00A pinout, EVL8017-L-00A application, or EVL8017-L-00A equivalent, this evaluation board enables rapid validation of MP8017-based IEEE 802.3af PD designs with PSR/SSR topology selection, thermal shutdown at 150°C, 500kHz switching frequency, and efficiency up to 88% at 1A/12V output under 48V input.

Technical Context

The EVL8017-L-00A implements the MP8017's dual-regulation architecture: PSR mode eliminates auxiliary winding via VDIODE-based output diode compensation and FB-controlled ramping, while SSR mode uses optocoupler feedback routed through COMP with internal EA disabled and RCOMP pull-up bias (9–11kΩ). Both modes support configurable soft-start via SS capacitor and frequency dithering (±6%, 9kHz injection) for EMI reduction.

Its PD interface executes full IEEE 802.3af compliance - detection (24.9kΩ signature), classification (Class 0–4 via RCLASS), inrush current limiting (120mA), operation current limit (390–420mA), and 100V hot-swap MOSFET with 0.5Ω R_ON. Protection includes OLP, OVP (FB threshold 115–135μA), OTP (150°C shutdown), and hiccup-mode recovery.

Key Specifications

Availability

EVL8017-L-00A is available at Aetrix Electronics and suitable for IEEE 802.3af PoE PD design validation, active-clamp flyback topology evaluation, and 13W isolated power supply qualification requiring stable component supply and documented thermal performance.

Supply support for EVL8017-L-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, with expertise in integrated DC/DC converters, PoE solutions, and energy-efficient power architectures.

The EVL8017-L-00A belongs to MPS's PoE evaluation platform family, engineered specifically to accelerate development of IEEE 802.3af-compliant powered devices using the MP8017's dual-regulation active-clamp flyback controller.

FAQ

What is the purpose of the EVL8017-L-00A evaluation board?

The EVL8017-L-00A is a fully assembled, tested reference design board that demonstrates the MP8017 IC's IEEE 802.3af-compliant PoE PD functionality with active-clamp flyback converter. It provides validated layout, thermal performance data (θ_JA = 50°C/W), and measurable efficiency curves (up to 88%) to de-risk customer design-in of 13W isolated PoE power supplies.

How do I configure PSR vs. SSR regulation on this board?

PSR or SSR mode is selected by setting the M/D pin voltage level per Table 2 in the MP8017 datasheet: 0.1V (PSR), 0.5–0.95V (SSR), or higher levels for dither enable. On EVL8017-L-00A, this is implemented via resistor divider; PSR uses direct FB-to-SW feedback, while SSR routes optocoupler output to COMP with FB configured for OVP only.

Does the board support IEEE 802.3at (PoE+) operation?

Yes - the underlying MP8017 IC supports Class 4 classification (25.5W), and EVL8017-L-00A's 100V hot-swap MOSFET and thermal design accommodate higher input voltages and currents. However, the board is optimized for 13W (Class 0–3); full 25.5W operation requires external component derating and layout review per MPS AN-127.

What protection features are implemented and verified on this board?

EVL8017-L-00A validates all MP8017 protections: overtemperature shutdown (150°C, 20°C hysteresis), overvoltage (FB-triggered at 115–135μA), overload (1.5A LS-FET limit), short-circuit (2.1A), and hiccup-mode recovery. Thermal shutdown behavior and OVP trip points are confirmed in the "Typical Performance Characteristics" section of the MP8017 datasheet Rev. 1.1.

Can I use this board to evaluate MPS's MPL-AT series inductors?

Yes - the EVL8017-L-00A is explicitly optimized for use with MPS's MPL-AT series shielded power inductors, as noted in the "Optimized Performance" section of the MP8017 datasheet. Recommended part is MPL-AT252012-100MD, which matches the board's 10µH requirement and 1.5A saturation current rating.

Is the board RoHS-compliant and lead-free?

Yes - EVL8017-L-00A complies with RoHS Directive 2011/65/EU and is fully lead-free and halogen-free, consistent with MPS's green manufacturing policy. All components, including the MP8017GL IC in QFN-19 package, meet JEDEC J-STD-020 moisture sensitivity level 1 requirements.