STMicroelectronics EVAL6562-250W

Overview

EVAL6562-250W from STMicroelectronics is an evaluation board for the L6562 transition-mode (TM) PFC controller, designed to validate 250W active power factor correction pre-regulator operation across universal AC input (85–265 VAC). It implements a boost topology with STTH3L06 diode, STP20NM50 MOSFET, and STBR606 bridge rectifier, achieving >94% efficiency at full load and PF >0.98 at 230 VAC.

For engineers reviewing the EVAL6562-250W datasheet, EVAL6562-250W pinout, EVAL6562-250W application, or EVAL6562-250W equivalent, key considerations include TM PFC validation methodology, component stress profiling under wide-range mains, thermal performance of the Aavid S508 heatsink, and design transferability to production-level 250W PFC stages.

Technical Context

The board implements a critical-conduction-mode (CrCM) boost PFC stage using the L6562 IC, which senses inductor current via R12/R13 (0.33 Ω shunt) and regulates output voltage (400 VDC) through feedback network R15/R16 (750 kΩ) and C6 (680 nF). Input voltage feedforward is provided by R1/R2 (910 kΩ) to stabilize loop gain across line variations.

It supports universal AC input (85–265 VAC, 47–63 Hz), delivers 250 W continuous output at 400 VDC, and meets EN61000-3-2 Class D harmonic limits. Protection features include overvoltage shutdown (via Zener D3), overcurrent limiting (R12/R13 sensing), and NTC-based inrush control (2.5 Ω thermistor).

Key Specifications

Availability

EVAL6562-250W is available at Aetrix Electronics and suitable for industrial power supply development, LED driver reference design, medical-grade AC/DC front-end validation, and energy-efficient appliance PFC qualification requiring stable component supply and documented test data.

Supply support for EVAL6562-250W 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, specializing in power management, analog, microcontrollers, and automotive ICs.

The EVAL6562-250W belongs to ST's high-performance PFC evaluation platform family, developed to accelerate adoption of transition-mode controllers in cost-sensitive, high-efficiency AC/DC power supplies.

FAQ

What is the primary function of the EVAL6562-250W evaluation board?

The EVAL6562-250W is a fully assembled, tested reference design for validating the L6562 transition-mode PFC controller in 250W boost pre-regulator applications. It provides measurable performance data-including efficiency curves, PF vs. input voltage plots, and thermal profiles-enabling rapid design verification before custom PCB layout.

Does this board support universal AC input?

Yes. The board is explicitly designed for wide-range mains operation (85–265 VAC, 47–63 Hz), as confirmed by its schematic, bill-of-materials, and published PF vs. Vin characterization (Figure 2). Input feedforward network (R1/R2 = 910 kΩ) maintains stable regulation across the full range.

Which key components define its 250W capability?

Its 250W rating is enabled by the STP20NM50 (20A, 500V MOSFET), STTH3L06 (3A, 600V ultrafast diode), STBR606 (6A bridge), and Aavid S508 heatsink. Inductor EB0057-C (Coilcraft) and 400 V/100 µF bulk capacitor (C8) are sized for continuous 250W conduction and hold-up time compliance.

Is the EVAL6562-250W still in active production?

No. Per ST's official documentation, EVAL6562-250W is marked "Obsolete Product(s)" in the revision history and part list sections. However, it remains technically valid for legacy design analysis, educational use, and reverse-engineering of CrCM PFC topologies where functional equivalence is required.