STMicroelectronics EVL6564H-25W-BB

Overview

EVL6564H-25W-BB from STMicroelectronics is a 25 W non-isolated buck-boost LED driver demonstration board implementing high-power-factor AC/DC conversion using the L6564H PFC controller and SEA05L CC-CV regulator. It delivers 350 mA ±1% LED current at 70 V ±10% output, achieves >0.9 power factor across 85–265 Vac input, and meets EN55022 Class-B conducted EMI limits.

For engineers reviewing the EVL6564H-25W-BB datasheet, EVL6564H-25W-BB application notes, EVL6564H-25W-BB bill of materials, or EVL6564H-25W-BB alternative evaluation boards, this board serves as a validated reference for wide-input-range, high-PF LED drivers targeting Japanese 100 Vac lighting and 200 Vac building automation tube replacements.

Technical Context

The board implements a continuous-conduction-mode (CCM) buck-boost topology with active power factor correction, enabling stable 350 mA LED current regulation over 85–265 Vac input while maintaining >0.9 PF and <15% THD at full load. The L6564H controls the boost stage for near-unity PF, while the SEA05L provides precise constant-current feedback via optocoupler-coupled secondary-side sensing.

Designed for thermal operation up to 50 °C ambient, it integrates overvoltage, open-loop, and short-circuit protection, and uses a 62 mH common-mode choke and X/Y capacitors to meet EN55022 Class-B EMI requirements without external filtering. Its mechanical form factor fits standard LED driver enclosures for retrofitting incandescent flood lamps up to 100 W.

Key Specifications

Availability

EVL6564H-25W-BB is available at Aetrix Electronics and suitable for LED lighting design validation, Japanese-market 100 Vac fixture development, and 200 Vac building automation tube replacement programs requiring stable component supply and pre-validated EMI compliance.

Supply support for EVL6564H-25W-BB 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, Switzerland, designing and manufacturing microcontrollers, analog ICs, power management devices, and automotive-grade components for industrial, consumer, and automotive markets.

This demonstration board belongs to ST's LED lighting reference design portfolio, developed specifically to accelerate adoption of high-efficiency, high-PF, non-isolated LED drivers for retrofit and new-build commercial lighting applications.

FAQ

Is EVL6564H-25W-BB a production-ready LED driver or a development tool?

EVL6564H-25W-BB is a demonstration board intended for design evaluation and reference implementation-not a certified end-product. It provides a fully assembled, tested platform to validate circuit behavior, thermal performance, and EMI compliance before custom PCB design. No safety certification (e.g., UL, CE) is claimed for standalone use.

Which ICs are central to its operation and what are their roles?

The L6564H is the active PFC controller managing input current shaping for >0.9 power factor; the SEA05L is the secondary-side CC-CV controller regulating LED current to 350 mA ±1% via optocoupler feedback. Both are ST proprietary ICs co-optimized for this buck-boost topology and documented in their respective datasheets (Doc ID CD00267227 and CD00267228).

Can the output be adjusted for different LED string configurations?

Yes-output voltage and current can be reconfigured by modifying resistor dividers on the SEA05L feedback network and adjusting the L6564H current-sense resistor (R26/R27). The board supports 22–24 LED strings (63–77 Vdc), and design notes in AN1059 and AN1060 provide equations for scaling to alternate configurations.

Does it support dimming, and if so, how?

No native dimming interface is implemented. The board operates in fixed-output constant-current mode. Dimming requires external modification-such as injecting a variable bias into the SEA05L feedback node or replacing the current-sense resistor with a PWM-controlled MOSFET-but no schematic or layout provisions for this are included in the base design.