EVL599IND-250W Demonstration Board

Introduction

The STMicroelectronics EVL599IND-250W is a 250 W demonstration board for evaluating a 24 V industrial AC-DC power-conversion design. Its technically notable feature is a two-stage architecture that combines a transition-mode power-factor-correction (PFC) preregulator with an LLC resonant half-bridge converter.

Rather than representing a single-controller power supply, the board brings together the PFC and resonant-conversion stages on a motherboard, with three daughterboards supporting the complete implementation. It is intended as a practical reference platform for examining an industrial AC-DC converter design based on STMicroelectronics control ICs.

What it does

The EVL599IND-250W converts mains AC input to a regulated 24 V output. It accepts a 90 V_AC to 265 V_AC input range at 45 Hz to 65 Hz, supporting evaluation across common AC mains conditions.

Its transition-mode PFC front end is followed by an LLC resonant half-bridge stage. The design uses the L6462A, STNRG599A, and SRK2001A controller ICs. The board is rated for up to 250 W output power, with a stated maximum peak output power of 300 W.

For low-load evaluation, the board’s specified open-load input power is below 140 mW at both 115 V_AC and 230 V_AC. The design is associated with EN-61000-3-2 Class-D and JEITA-MITI Class-D compliance standards.

Applications

Potential uses for this demonstration board include:

• Evaluation of 24 V industrial AC-DC power-supply architectures
• Development and testing of PFC plus LLC resonant converter stages
• Investigation of mains-powered 24 V adapters
• Reference-design work for consumer switched-mode power supplies
• Bench assessment of power-control implementations using the listed STMicroelectronics controller ICs

Design considerations

The board is a development platform rather than a finished enclosed supply, so system integration should account for its physical layout and exposed power-conversion stages. Its motherboard and three daughterboards implement the PFC and LLC resonant-tank functions, which may be useful when assessing individual portions of the design.

The board measures 165 mm by 65 mm and has a maximum height of 30 mm. Designers evaluating it should also account for the high-voltage AC input range and the 24 V output requirement when planning test connections and surrounding hardware.

Availability and further information

The source/distributor link on this page provides further product information for the EVL599IND-250W demonstration board. The linked datasheet provides the detailed technical documentation, including information needed to evaluate the board’s implementation and operating conditions.