Monolithic Power Systems Inc. EV4056-S-00A

Overview

EV4056-S-00A from Monolithic Power Systems is a low-line-voltage, 10W TRIAC-dimmable LED driver evaluation board based on the MP4056GS controller IC. It implements a single-stage buck-boost topology with active PFC, delivers 50V/200mA to LED loads, operates from 108–132VAC/60Hz, and achieves >85% efficiency, PF >0.93, and THD <20% - optimized for A19 bulb form factor.

For engineers reviewing the EV4056-S-00A datasheet, EV4056-S-00A pinout, EV4056-S-00A application, or EV4056-S-00A equivalent, this board enables rapid validation of TRIAC dimmer compatibility (tested with 29 commercial dimmers), boundary-conduction-mode operation, adaptive phase-cut detection, and IEC61000-3-2 Class C harmonic compliance in cost-sensitive solid-state lighting designs.

Technical Context

The EV4056-S-00A implements a non-isolated, single-winding inductor buck-boost architecture driven by the MP4056GS controller. It uses adaptive dimmer-type detection and zero-current detection (ZCD) via R1/R2/C8/D4 to maintain boundary conduction mode across input line and dimmer phase variations.

Input stage includes MB6S bridge rectifier (BD1), π-filter (C1/L2/C3), and MOV RV1 for IEC61547 surge immunity. Output regulation relies on dual current-sense resistors (R9/R10 = 500mΩ) and overvoltage clamping via sidactor D6 (77V), while thermal management targets <91°C on R4 under full-load leading-edge dimming.

Key Specifications

Availability

EV4056-S-00A is available at Aetrix Electronics and suitable for residential lighting, industrial LED retrofit bulbs, and commercial downlight evaluation requiring stable component supply, repeatable dimming validation, and pre-certified EMI/surge performance.

Supply support for EV4056-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 semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The EV4056-S-00A belongs to MPS's LED driver evaluation platform family, engineered specifically to accelerate development of cost-optimized, TRIAC-dimmable, non-isolated LED drivers meeting global energy and EMI regulations.

FAQ

What is the maximum LED string voltage the EV4056-S-00A can drive?

The board is configured for 50V output (typical), supporting up to 16 series-connected LEDs at 200mA. Output voltage is set by transformer turns ratio and feedback network; absolute maximum output is clamped to 77V by sidactor D6 during open-load or overvoltage conditions.

Does the EV4056-S-00A support leading-edge and trailing-edge dimmers?

It is validated exclusively for leading-edge (TRIAC) dimmers - 29 models tested per IEC60929 Annex E, including Lutron and Leviton units. Trailing-edge (ELV) dimmer compatibility is not specified or verified in the reference design or test report.

Can the EV4056-S-00A be used without a dimmer?

Yes - it operates as a constant-current LED driver in non-dimming mode. The adaptive dimmer detection circuit automatically disables phase-cut control when no dimmer is present, maintaining stable 200mA output with <±3% line/load regulation.

What protection features are implemented on the board?

Five hardware-based protections: output overvoltage (D6 clamp), output short-circuit (cycle-by-cycle current limit via R9/R10), winding short-circuit (ZCD pin fault detection), ZCD pin short (D4 clamping + internal comparator), and over-temperature (thermal shutdown threshold integrated in MP4056GS).

Is the EV4056-S-00A agency certified?

No - the board is an engineering prototype for design evaluation only. It satisfies safety requirements per internal testing (3750VAC hipot, thermal limits), but lacks UL, CE, or other third-party agency certification. Users must implement isolation transformers during lab testing per the warning on page 2.

What is the physical size and mounting compatibility?

Board dimensions are 56mm × 22mm × 19mm (L×W×H), designed to fit inside standard A19 bulb enclosures. It uses through-hole and SMD components, with no heatsink required under rated conditions - thermal imaging confirms D5 at 57.8°C and R4 at 90.9°C with leading-edge dimming at 50% phase.