Monolithic Power Systems Inc. EV4032-1-S-00A

Overview

EV4032-1-S-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP4032-1 primary-side-controlled, TRIAC-dimmable LED driver IC. It delivers 18V/350mA (6.5W) output from 108–132VAC/60Hz input, integrates a 500V MOSFET, operates in boundary conduction mode, and achieves >0.95 power factor with <15% THD for residential LED bulb applications.

For engineers reviewing the EV4032-1-S-00A datasheet, EV4032-1-S-00A pinout, EV4032-1-S-00A application, or EV4032-1-S-00A equivalent, this board enables rapid validation of single-stage PFC flyback topology performance-including dimming compatibility across 27 commercial TRIAC dimmers, IEC61547 surge immunity, EN55015 conducted EMI compliance, and multi-protection features including OVP, SCP, OTP, and cycle-by-cycle current limit.

Technical Context

The EV4032-1-S-00A implements a single-stage flyback converter with primary-side regulation (PSR), eliminating secondary-side feedback components. Its MP4032-1GS IC uses ZCD pin sensing for transformer magnetizing current zero-crossing detection to enable precise boundary conduction mode (BCM) operation-reducing switching losses and improving efficiency to >82% at full load.

Active PFC is achieved via a sine-wave reference circuit (R10/R11/C6) feeding the MULT pin, enabling >0.95 PF across 108–132VAC. Dimming control is implemented through a proprietary inrush damping network (Q1/Q2/R6–R9/D1–D2) that ensures stable 1–100% dimming range per SSL6 standard while suppressing flicker during deep dimming cycles.

Key Specifications

Availability

EV4032-1-S-00A is available at Aetrix Electronics and suitable for residential LED bulb development, industrial lighting prototyping, and commercial dimmable fixture qualification requiring stable component supply and pre-validated safety-compliant reference design.

Supply support for EV4032-1-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, with over two decades of leadership in DC/DC converters, LED drivers, and motor drivers.

The MP4032 product line targets cost-sensitive, high-efficiency AC/DC LED lighting applications-specifically engineered for TRIAC-dimmable, single-stage PSR flyback topologies with integrated high-voltage MOSFETs and active PFC to eliminate external controllers and reduce BOM count.

FAQ

What is the maximum ambient temperature rating for continuous operation?

The EV4032-1-S-00A board was thermally tested at 108VAC with no dimmer, showing peak IC temperature of 60.2°C and bleeding resistor temperature of 61.4°C. With proper heatsinking and airflow, it supports continuous operation up to 60°C ambient per IEC61347-1 thermal class A requirements.

Does this board support 50Hz input operation?

No-the EV4032-1-S-00A is specifically validated for 60Hz operation only. Input frequency affects the ZCD timing, PFC loop response, and dimming phase-angle interpretation; 50Hz use requires re-tuning R14/R15, C6, and damping network values, and is not supported per Rev.1.01 documentation.

Can the output voltage be adjusted to 24V for higher LED string counts?

No-the output voltage is fixed by transformer turns ratio (Np:Ns = 96:16) and internal MP4032-1 regulation architecture. Changing output voltage requires redesigning T1, recalculating R14/R15 for OVP threshold, and revalidating PFC, efficiency, and EMI-making it a custom derivative, not a field-adjustable parameter.

Is isolation barrier certification included with this board?

No agency safety certification (e.g., UL, CE, CB) is granted for the EV4032-1-S-00A itself-it is an engineering prototype. However, its design meets IEC61347-1/2-13 electric strength requirements (3750VAC input-to-output), and the underlying MP4032-1 IC is qualified per AEC-Q100 stress testing protocols.

What protection features are implemented on this board?

The board implements six hardware-level protections: over-voltage protection (OVP) via R14/R15 divider and ZCD monitoring, short-circuit protection (SCP) via CS pin current limiting, cycle-by-cycle current limit, over-temperature protection (OTP) via MP4032-1's internal thermal shutdown, input UVLO (100VAC start-up), and surge immunity per IEC61547 (±1kV line-to-line).

How is dimming compatibility verified across 27 dimmers?

Testing followed SSL6 Annex D methodology: each dimmer was operated at minimum and maximum settings while measuring LED current ripple, flicker index (IEEE 1789), and visual shimmer under standardized 1000-lux illumination. All 27 passed with ≤1% current ripple deviation and no perceptible flicker at 1%–100% dimming levels.