Monolithic Power Systems Inc. EV4026-J-00A

Overview

EV4026-J-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP4026GJ primary-side-controlled offline LED driver IC in a single-stage flyback topology. It delivers 7W output (20V, 350mA) for isolated A19 LED bulbs across universal AC input (90–265VAC), achieves >0.9 power factor, 84–87% efficiency, and meets IEC61000-3-2 Class C harmonics and IEC61547 surge immunity.

For engineers reviewing the EV4026-J-00A datasheet, EV4026-J-00A pinout, EV4026-J-00A application, or EV4026-J-00A equivalent, this board enables rapid validation of primary-side regulation, active PFC implementation, boundary conduction mode operation, and multi-protection behavior-including OVP, SCP, primary-side OCP, and OTP-in compact A19-form-factor lighting designs.

Technical Context

The EV4026-J-00A implements a flyback converter with primary-side control, eliminating secondary-side feedback components and enabling cost-effective, space-constrained A19 bulb integration. It uses auxiliary winding zero-current detection (ZCD) via R9/R10/D4/C1 to precisely time MOSFET switching at transformer demagnetization, ensuring boundary conduction mode (BCM) operation.

Active PFC is achieved through line-voltage feedforward (R7) and sine-wave reference generation (R5/R6/C4), maintaining high PF (>0.9) across 90–265VAC. Protection functions include primary-side overcurrent sensing (R11/R12), output overvoltage monitoring (R9/R10 divider), short-circuit response, and thermal shutdown.

Key Specifications

Availability

EV4026-J-00A is available at Aetrix Electronics and suitable for LED bulb development, lighting OEM qualification, and energy-efficient residential/commercial lighting design requiring stable component supply and pre-validated safety compliance.

Supply support for EV4026-J-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 a focus on energy-efficient power conversion and LED lighting solutions.

The EV4026-J-00A belongs to MPS's LED driver evaluation platform family, engineered specifically to accelerate adoption of primary-side-controlled, PFC-enabled drivers for compact, agency-ready solid-state lighting products.

FAQ

What is the maximum LED string voltage the EV4026-J-00A can drive?

The board is configured for 20V output (6× LEDs in series at ~3.3V each), with OVP set by R9/R10 to ~22V. Adjusting the resistor divider allows safe operation up to 24V, but transformer turns ratio (Np:Ns = 115:23) and U1's MULT pin voltage limit constrain higher voltages without hardware modification.

Does the EV4026-J-00A require an external optocoupler or secondary-side feedback?

No. It uses primary-side control only: output current is regulated via primary-sense resistors (R11/R12), and output voltage is inferred from auxiliary winding timing and ZCD detection-eliminating optocouplers, TL431, and secondary-side circuitry entirely.

Can the EV4026-J-00A be used for non-A19 applications?

Yes. Its 7W flyback architecture supports other isolated LED loads (e.g., PAR20, GU10, or linear tubes) with matching transformer and sense-resistor adjustments. Layout and thermal design remain valid for any enclosure with ≥66mm × 22.6mm × 23mm volume.

What protections are implemented and how do they behave under fault?

Short-circuit protection shuts down switching within 2 cycles; primary OCP triggers if R11/R12 voltage exceeds threshold; OVP disables gate drive when auxiliary winding voltage exceeds programmed level; OTP halts operation above 150°C. All recover automatically after fault removal.

Is the board agency-certified for production use?

No. As stated in the documentation, it is an engineering prototype not submitted for UL/EN/IEC agency approval. It satisfies key safety test requirements (surge, dielectric strength), but final product certification requires full system-level testing and agency review.

How is input surge immunity achieved on this board?

Surge suppression combines RV1 (430V MOV), CX1 (X-cap), CY1 (Y-cap), and common-mode chokes (L1/L2/L3). The design passed 1kV L–PE and 500V L–N surges per IEC61547, verified with full-load operation post-surge without latch-up or parameter shift.