Monolithic Power Systems Inc. EV4027-J-01A

Overview

EV4027-J-01A from Monolithic Power Systems is an evaluation board for the MP4027GJ primary-side-controlled offline LED driver IC, designed to demonstrate a 7W isolated A19 bulb solution with 20V/350mA output, universal AC input (90–265VAC), >0.9 power factor, and boundary conduction mode operation.

For engineers reviewing the EV4027-J-01A datasheet, EV4027-J-01A pinout, EV4027-J-01A application, or EV4027-J-01A equivalent, this board enables rapid validation of single-stage flyback LED driver performance-including IEC61000-3-2 Class C harmonic compliance, IEC61547 surge immunity, and multi-protection features-within compact A19 form factor constraints.

Technical Context

The EV4027-J-01A implements a single-stage flyback topology with primary-side regulation, eliminating secondary feedback circuitry while maintaining ±3% LED current accuracy across line and load variations. It uses auxiliary winding zero-crossing detection (ZCD) for boundary conduction mode control and integrates active PFC via input voltage feedforward (R7) and sine-wave reference generation (R5/R6/C4).

Protection functions include primary-side overcurrent (via R11/R12), output overvoltage (set by R9/R10 divider), short-circuit, over-temperature (NTC-based), and input UVLO. The board meets 3750VAC input-to-output isolation per IEC61347-1/2-13 and passes 1kV line-to-earth surges per IEC61547.

Key Specifications

Availability

EV4027-J-01A is available at Aetrix Electronics and suitable for LED bulb design validation, lighting OEM qualification, and power electronics lab testing requiring stable component supply and pre-validated safety-compliant reference designs.

Supply support for EV4027-J-01A 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 a focus on energy-efficient DC/DC, AC/DC, LED drivers, and motor control solutions.

The EV4027-J-01A belongs to MPS's LED driver evaluation platform family, engineered specifically to accelerate development of cost-sensitive, space-constrained, and regulatory-compliant solid-state lighting products using primary-side control architecture.

FAQ

What is the maximum LED string voltage supported by EV4027-J-01A?

The board is configured for 20V nominal output (6×LEDs in series), with OVP threshold set to ~22.5V via R9/R10 divider. Output voltage can be adjusted up to 24V by modifying the resistor ratio, but transformer turns ratio (Np:Ns = 115:23) and clamp network (C6/R14/D3) must remain compatible with peak drain voltage limits.

Does EV4027-J-01A support analog (0–10V) dimming?

No - the board only supports PWM dimming applied directly to the NTC pin, as documented in the Quick Start Guide. Analog dimming requires external circuitry to convert voltage to PWM signal; no dedicated 0–10V interface or DAC is integrated on this evaluation board.

Can EV4027-J-01A be used with non-isolated topologies?

No - the board implements an isolated flyback converter with reinforced insulation (3750VAC input-to-output), mandatory for A19 bulb safety certification. Its transformer (RM6 core, triple-insulated secondary) and layout are optimized for isolation, not non-isolated buck or buck-boost configurations.

What is the role of the NTC thermistor on this board?

The 220kΩ NTC (muRata NCP18WM224E03RB) sets the thermal shutdown threshold. When board temperature rises, NTC resistance drops, pulling the IC's THERM pin voltage below its trip point (~1.2V), triggering over-temperature protection and halting switching until cooldown.

Is the MP4027GJ IC on this board RoHS-compliant and lead-free?

Yes - all MPS parts, including MP4027GJ-Z mounted on EV4027-J-01A, are lead-free and fully compliant with the RoHS directive. MPS green status documentation is publicly available on their Quality Assurance webpage.

How is input surge protection implemented on EV4027-J-01A?

Surge protection uses a 430V MOV (TVR10431KSY) across AC lines and a 2A fuse (BUSSMANN SS-5-2A). The board passed IEC61547 Line–Line (±500V) and Line–Earth (±1kV) surge tests at 230VAC with full-load operation verified post-surge.