STMicroelectronics EVLHVLED815W10F

Overview

EVLHVLED815W10F from STMicroelectronics is a 10 W isolated LED driver evaluation board based on the HVLED815PF flyback controller-MOSFET hybrid IC, operating from 88–265 VAC with primary-side regulation, >0.95 power factor, <20% THD, and up to 84% efficiency. It delivers 455 mA ±5% constant current at 22 V output for high-bay lighting and commercial signage.

For engineers reviewing the EVLHVLED815W10F datasheet, EVLHVLED815W10F pinout, EVLHVLED815W10F application, or EVLHVLED815W10F equivalent, this board enables rapid validation of single-stage PFC+isolated flyback LED driver topologies without optocouplers or secondary sensing circuitry.

Technical Context

The board implements a single-stage high-power-factor flyback converter using ST's patented primary-sensing regulation (PSR) technique, eliminating optocoupler and secondary feedback components. It integrates HVLED815PF - an 800 V avalanche-rugged Power MOSFET paired with a low-voltage PWM controller in SO16 - enabling direct rectified-mains operation with minimal external parts.

Input stage includes X2-class EMI filtering (C1, C2), bridge rectification (D1), and bulk storage (C11/C12/C16). The transformer (T1, EF20 core, Lp = 1.5 mH, Np:Ns:NAUX = 190:42:24) provides galvanic isolation and auxiliary winding for VCC supply. Protection includes open/short LED string detection and thermal foldback via internal HVLED815PF circuitry.

Key Specifications

Availability

EVLHVLED815W10F is available at Aetrix Electronics and suitable for commercial LED luminaires, industrial area lighting, and outdoor signage requiring stable component supply, regulatory-compliant PFC performance, and rapid prototyping of isolated LED drivers.

Supply support for EVLHVLED815W10F 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, analog devices, and sensors for industrial, automotive, and consumer applications.

The HVLED815PF product line targets cost-sensitive, high-efficiency offline LED drivers requiring integrated high-voltage switching and primary-side regulation - optimized for 5–15 W isolated lighting systems with strict PFC and THD requirements.

FAQ

What is the maximum LED string voltage supported by EVLHVLED815W10F?

The board is configured for 22 V nominal output, corresponding to ~7-series white LEDs (3.2 V each). With its HVLED815PF controller's 800 V MOSFET and transformer turns ratio (Np:Ns = 190:42), it supports up to ~30 V LED string voltage under full-load regulation before foldback activation.

Does EVLHVLED815W10F include overtemperature protection?

Yes - the HVLED815PF IC incorporates thermal shutdown with hysteresis. When junction temperature exceeds ~150 °C, the device disables switching until temperature falls below ~130 °C. This is implemented internally and requires no external thermistor or circuitry.

Can the output current be adjusted, and how?

Yes - output current is set by resistor R2 (1 Ω) in series with the LED return path. Replacing R2 changes the current sense threshold: I_OUT ≈ 0.455 V / R2. For example, a 0.82 Ω resistor yields ~555 mA, while 1.2 Ω yields ~379 mA, within HVLED815PF's operational range.

Is the board certified for safety or EMC compliance?

No - EVLHVLED815W10F is an evaluation board intended for lab testing and design verification only. It lacks final safety insulation spacing, creepage/clearance certification, or pre-compliance EMC filtering. Users must validate final designs per IEC 61347-1/-2-13, EN 55015, and UL 8750 requirements.