STMicroelectronics EVLHVLED815W8CV

Overview

EVLHVLED815W8CV from STMicroelectronics is an 8 W isolated LED driver evaluation board based on the HVLED815PF high-voltage flyback controller-MOSFET hybrid IC, delivering constant voltage (25 V ±5%) with primary-side regulation and no optocoupler. It accepts 200–265 VAC input, achieves >0.90 power factor and >87% efficiency, and meets EN 61000-3-2 Class D harmonic limits for EU mains compliance.

For engineers reviewing the EVLHVLED815W8CV datasheet, EVLHVLED815W8CV pinout, EVLHVLED815W8CV application, or EVLHVLED815W8CV equivalent, this board enables rapid validation of single-stage high-PF LED driver designs targeting commercial indoor lighting, retrofit lamps, and low-cost constant-voltage LED modules requiring compact, cost-effective AC/DC conversion without secondary feedback.

Technical Context

The board implements a single-stage high-power-factor flyback topology using primary-side regulation (PSR), eliminating optocouplers and secondary-side sensing circuitry. The core HVLED815PF integrates an 800 V avalanche-rugged Power MOSFET with a low-voltage PWM controller in SO16, enabling direct rectified-mains operation with minimal external components.

Input stage includes EMI filtering and bridge rectification; output features regulated 25 V DC with up to 310 mA current capability. Transformer T1 (TDK SRW13EP-XxxH003) provides galvanic isolation and energy transfer, while harmonic suppression complies with EN 61000-3-2 Class D via controlled conduction timing and passive filtering.

Key Specifications

Availability

EVLHVLED815W8CV is available at Aetrix Electronics and suitable for commercial indoor lighting, LED retrofit lamp development, and low-cost constant-voltage LED module design requiring stable component supply and regulatory-compliant AC/DC conversion.

Supply support for EVLHVLED815W8CV 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 markets.

This evaluation board belongs to ST's LED driver reference design portfolio, developed to accelerate adoption of high-efficiency, high-power-factor offline LED drivers for cost-sensitive, space-constrained lighting applications.

FAQ

What is the purpose of the EVLHVLED815W8CV evaluation board?

The EVLHVLED815W8CV is a fully assembled demonstration board for validating the HVLED815PF-based single-stage high-PF flyback LED driver architecture. It provides a working 8 W constant-voltage output (25 V ±5%) from 200–265 VAC input, with no optocoupler and built-in EN 61000-3-2 Class D compliance. Engineers use it to evaluate performance, thermal behavior, and layout practices before custom design.

Does this board support dimming functionality?

No, the EVLHVLED815W8CV implements a fixed-output constant-voltage configuration without dedicated dimming control inputs or circuitry. The HVLED815PF IC itself does not integrate analog or PWM dimming interfaces; output voltage and current are set by transformer turns ratio and feedback resistors (R14, R13). External dimming would require redesigning the feedback network or adding auxiliary control circuitry.

Can the output voltage be adjusted to values other than 25 V?

Yes, the output voltage is determined by the transformer turns ratio and the feedback resistor divider (R13, R14). Per the schematic and bill of materials, R14 = 62 kΩ and R13 = 6.8 kΩ set the 25 V output. Adjusting these resistors recalibrates the PSR feedback threshold; however, transformer saturation, MOSFET voltage stress, and output capacitor ratings must be re-evaluated for any significant change (e.g., >30 V or <20 V).

Is the HVLED815PF IC on this board replaceable with another controller?

No - the HVLED815PF is a proprietary ST device integrating an 800 V Power MOSFET and PWM controller in SO16, with patented primary-side sensing. It is not pin-compatible or functionally substitutable with generic flyback controllers (e.g., UC384x, VIPer series) due to internal gate drive, high-voltage drain connection, and PSR algorithm dependencies. Replacement requires full redesign including transformer, snubber, and feedback network.