Monolithic Power Systems Inc. EV4060-K-00A

Overview

EV4060-K-00A from Monolithic Power Systems is an evaluation board for the MP4060GK TRIAC-dimmable LED controller IC, implementing a single-stage buck-boost topology with active PFC and boundary conduction mode operation. It delivers 72V/125mA (9W) to LED loads from 198–265VAC/50Hz input, achieves >85% efficiency, >0.78 power factor, and <36% THD, and is validated for IEC61000-3-2 Class C harmonics and IEC61547 surge immunity.

For engineers reviewing the EV4060-K-00A datasheet, EV4060-K-00A pinout, EV4060-K-00A application, or EV4060-K-00A equivalent, this board supports rapid validation of high-line AC-driven LED lighting designs requiring deep dimming range, adaptive dimmer type detection, integrated thermal foldback, and A19-bulb form-factor compatibility.

Technical Context

The EV4060-K-00A implements a non-isolated buck-boost converter controlled by the MP4060GK IC, operating in boundary conduction mode (BCM) to minimize MOSFET and diode switching losses. It integrates adaptive dimmer type detection-distinguishing leading- and trailing-edge TRIAC dimmers-and uses phase-cut analysis to maintain stable current regulation across 17 tested commercial dimmers.

Its active bleeder circuit (enabled via BD pin) monitors input current through R11 and injects bleeding current via R12 to sustain TRIAC holding current, eliminating flicker. The board includes a π-type EMI filter (C1/L1/C2), auxiliary winding-based VCC supply (R16/D2/C4), and zero-crossing detection (R8/R9) for precise BCM timing and output over-voltage protection.

Key Specifications

Availability

EV4060-K-00A is available at Aetrix Electronics and suitable for solid-state lighting development, residential LED bulb qualification, and industrial dimmable driver reference design requiring stable component supply, fast prototyping turnaround, and pre-validated safety compliance.

Supply support for EV4060-K-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 expertise in DC/DC conversion, LED drivers, motor control, and power modules.

The EV4060-K-00A belongs to MPS's LED driver evaluation platform family, designed specifically to accelerate adoption of their TRIAC-dimmable offline controllers-targeting cost-sensitive, high-efficiency, and regulatory-compliant LED lighting solutions for retrofit bulbs and integrated luminaires.

FAQ

What is the primary function of the EV4060-K-00A evaluation board?

The EV4060-K-00A is a fully assembled, tested reference design that demonstrates the MP4060GK IC's capability to drive 72V/125mA LED loads from 198–265VAC input using a non-isolated buck-boost topology with active PFC and TRIAC dimming. It is not a production-ready module but a tool for performance validation and schematic/layout benchmarking.

Does the board support both leading- and trailing-edge TRIAC dimmers?

Yes-the MP4060GK IC on this board features adaptive dimmer type detection and phase-cut-based control logic, validated across 17 commercial dimmers including MIKA, Busch, Berker, JUNG, and Siemens models. Test data confirms flicker-free operation down to 1mA minimum current with trailing-edge dimmers and 10–15mA with leading-edge types.

What protections are implemented on the EV4060-K-00A board?

The board incorporates output over-voltage protection (via R8/R9 divider), output short-circuit protection, winding short-circuit detection, over-temperature protection with thermal foldback, and input surge suppression (TVR07431 MOV + fusible resistor FR1). All protections are hardware-based and active during normal and fault conditions.

Can the EV4060-K-00A be used directly in end-product luminaires?

No-it is an engineering evaluation board intended for lab testing and design verification only. It lacks agency safety certifications (UL/EN62368), has exposed high-voltage traces, and requires isolation transformer use per MPS warning. Production designs must undergo full safety, thermal, and EMC requalification.

What is the physical size and mounting interface of the board?

The EV4060-K-00A measures 49.5mm × 26.4mm × 16.9mm and features four 1.0mm male header pins labeled L, N, LED+, and LED− for quick connection to AC mains and LED load. Its compact footprint and height are optimized to fit within standard A19 bulb enclosures during thermal and mechanical feasibility studies.

How is the active bleeder circuit implemented and why is it critical?

The active bleeder uses Q2 (3DD13001), D4–D6, R12, and R14 to inject controllable current when input current falls below TRIAC holding threshold. Enabled via the MP4060GK's BD pin, it eliminates random turn-off and flicker-especially with low-power trailing-edge dimmers-without requiring external timing components or high-loss passive bleeders.

What transformer is used and how is its magnetizing current sensed?

The board uses a custom EE13 transformer (Emei, 1.56mH ±8%, 182:54 turns ratio) with auxiliary winding sensing via R8/R9. This network provides zero-crossing detection for boundary conduction mode timing and doubles as OVP feedback-setting trip voltage at 85.2V based on 249kΩ/68.1kΩ resistor divider ratio.