STMicroelectronics EVLHVLED815W10A

Overview

EVLHVLED815W10A from STMicroelectronics is a non-isolated 10 W LED driver evaluation board based on the HVLED815PF IC, implementing single-stage high-power-factor buck-boost topology with primary-side regulation. It delivers constant output current, achieves >0.9 power factor, >85% efficiency, and <25% THD across 85–265 Vac input, targeting retrofit LED lamp replacement.

For engineers reviewing the EVLHVLED815W10A datasheet, EVLHVLED815W10A pinout, EVLHVLED815W10A application, or EVLHVLED815W10A equivalent, this board enables rapid validation of HVLED815PF-based LED driver designs for cost-sensitive, compact AC-input lighting systems requiring no optocoupler or secondary-side feedback.

Technical Context

The board implements a patented primary-side regulation architecture using the HVLED815PF's internal high-voltage switch (730 V rating) and integrated high-voltage startup generator, eliminating optocouplers and secondary sensing. Input rectification feeds directly into the buck-boost converter stage controlled by the IC's embedded PWM controller.

Output current is regulated via primary-side sensing using auxiliary winding feedback and internal current-sense amplifier. The design supports universal AC input (85–265 Vac), delivers 350 mA constant current at up to 28.5 V LED string voltage, and meets EN61000-3-2 Class C harmonic limits.

Key Specifications

Availability

EVLHVLED815W10A is available at Aetrix Electronics and suitable for LED lamp retrofit, commercial downlight development, and smart bulb reference design requiring stable component supply and validated AC/DC driver performance.

Supply support for EVLHVLED815W10A 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer applications.

The EVLHVLED815W10A belongs to ST's LED driver evaluation platform family, engineered specifically to accelerate adoption of high-efficiency, low-BOM-cost, non-isolated LED drivers for mains-connected lighting products.

FAQ

What is the maximum LED string voltage supported by EVLHVLED815W10A?

The board supports up to 28.5 V LED string voltage at 350 mA output current, corresponding to ~8–10 white LEDs in series under typical forward voltage conditions. This is fixed by the transformer turns ratio and HVLED815PF's internal OVP threshold, not user-adjustable via external components.

Does EVLHVLED815W10A require an external optocoupler for regulation?

No. The board uses primary-side regulation implemented entirely within the HVLED815PF IC, leveraging auxiliary winding feedback and internal current-sense circuitry. No optocoupler, secondary-side shunt regulator, or TL431 is present or required.

Can EVLHVLED815W10A operate from 12 V DC input?

No. The board is designed exclusively for AC mains input (85–265 Vac) and relies on internal high-voltage startup and rectified bulk capacitor operation. Applying DC input bypasses critical AC detection and startup sequencing, risking IC damage or failure to initiate regulation.

Is the PCB layout optimized for EMI compliance?

Yes. The board follows ST's recommended layout for HVLED815PF, including minimized high-di/dt loop area, dedicated ground planes for power and signal sections, and placement of X/Y capacitors per IEC61000-4-5 surge requirements. Full EN55015 conducted/radiated emission test data is provided in the associated design note.