Monolithic Power Systems Inc. EV4059-S-00A

Overview

EV4059-S-00A from Monolithic Power Systems is an evaluation board for the MP4059GS primary-side flyback LED driver IC, demonstrating a universal-input (90–265 VAC), 8 W, 21 V / 350 mA single-stage deep PWM dimming solution with 1%–100% flicker-free dimming range, valley switching operation, and integrated PFC.

For engineers reviewing the EV4059-S-00A datasheet, EV4059-S-00A pinout, EV4059-S-00A application, or EV4059-S-00A equivalent, this board enables rapid validation of MP4059GS-based LED drivers in architectural prototyping, dimming performance benchmarking, EMI compliance pre-screening, and thermal behavior analysis under real-world AC line and PWM signal conditions.

Technical Context

The EV4059-S-00A implements a single-stage flyback topology with primary-side regulation-eliminating optocouplers and secondary feedback components-using the MP4059GS controller in valley-switching mode to achieve >88% peak efficiency and PF >0.9 across 90–265 VAC input. It supports both constant-voltage (CV) and constant-current (CC) modes via R11 configuration.

Dimming control is applied directly to the DIM pin, enabling precise 1%–100% LED current regulation without shimmer or audible noise; test data confirms stable 350 mA output at 1% duty cycle (29.27 mA) and full-scale fidelity across 1 kHz/5 kHz PWM frequencies and 120/220 VAC line conditions.

Key Specifications

Availability

EV4059-S-00A is available at Aetrix Electronics and suitable for LED lighting development, smart bulb reference design validation, architectural lighting system prototyping, and industrial-grade dimmable driver qualification requiring stable component supply and documented performance benchmarks.

Supply support for EV4059-S-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 and mixed-signal semiconductor company specializing in high-performance power management ICs, including DC/DC converters, LED drivers, motor drivers, and battery management solutions.

The MP4059GS IC-demonstrated by EV4059-S-00A-is part of MPS's Smart LED Lighting Controller product line, designed specifically for cost-sensitive, high-efficiency, deep-dimming LED drivers targeting residential, commercial, and architectural lighting applications.

FAQ

What is the purpose of the R11 resistor on the EV4059-S-00A board?

R11 configures the MP4059GS IC between constant-voltage (CV) and constant-current (CC) operating modes. When installed, the board defaults to CV mode; removing R11 forces CC mode. For PWM dimming, R11 must remain installed to enable proper DIM pin functionality and maintain stable current regulation across the full 1%–100% range.

Does the EV4059-S-00A meet conducted EMI standards?

Yes-the board was tested per EN 55015 (Class B) with measured L/N line emissions below the limit line across 9 kHz–30 MHz at both 120 VAC and 230 VAC input. No additional filtering beyond the onboard CX1/C2/L1/L2 EMI filter is required for basic compliance verification in pre-compliance lab environments.

Can the EV4059-S-00A drive LED strings other than 21 V / 350 mA?

Yes-output voltage and current can be adjusted by modifying transformer turns ratio (N1:N2:N3), current-sense resistor R6/R10, and ZCD network (R13/R14/C4). The board's schematic and transformer winding diagram (Fig. 3–4) provide full design flexibility; however, re-tuning requires recalibration of OVP, brown-out, and valley detection thresholds.

What safety precautions apply when testing the EV4059-S-00A?

The board is an engineering prototype without agency safety certification (UL/EN 62368-1). All AC-powered testing must use an isolation transformer on the input. Do not touch exposed traces or connectors during operation. Verify grounding integrity before powering, and observe all local electrical safety regulations for live-circuit evaluation.

How does the MP4059GS achieve flicker-free dimming without secondary feedback?

It uses primary-side sensing of reflected output voltage and demagnetization timing (via ZCD pin) combined with adaptive current-mode control and internal digital dimming compensation. This eliminates phase-shift errors common in optocoupler-based systems and ensures consistent LED current regulation-even at 1% duty cycle-without ripple-induced shimmer.

Is the EV4059-S-00A RoHS-compliant and halogen-free?

Yes-all components on the board-including the MP4059GS IC, ISU04N65A MOSFET, and passive parts-are lead-free, halogen-free, and compliant with the EU RoHS Directive 2011/65/EU. MPS maintains full green status documentation on its official website under Quality Assurance resources.