STMicroelectronics EVAL6563-400W

Overview

EVAL6563-400W from STMicroelectronics is a 400 W fixed-off-time (FOT)-controlled PFC evaluation board built around the L6563 advanced transition-mode PFC controller, designed for wide-input AC-DC pre-regulation in ATX PSUs, flat-panel displays, and game consoles. It delivers regulated 400 V DC output from 90–265 V_AC input, achieves ≥90% efficiency at 90 V_AC, and meets EN55022 Class-B EMI requirements.

For engineers reviewing the EVAL6563-400W datasheet, EVAL6563-400W application circuit, EVAL6563-400W bill of materials, or EVAL6563-400W alternative evaluation platforms, this board provides validated reference design data, component-level layout guidance, thermal performance metrics, and FOT control implementation details critical for high-efficiency PFC stage development.

Technical Context

The EVAL6563-400W implements a continuous conduction mode (CCM) PFC pre-regulator using ST's L6563 SO-14 controller with fixed-off-time modulation-enabling stable operation across universal mains without complex current-sense compensation or variable-frequency jittering. Its topology integrates a PQ40-based 500 µH boost inductor (L4), dual STP12NM50FP MOSFETs (Q1/Q2), and a 330 µF/450 V bulk capacitor (C7).

Key operational parameters include 85 kHz maximum switching frequency at 90 V_AC/400 W, 22 ms hold-up time (to 300 V), and ≤10 V_pk-pk 100/120 Hz output ripple. The board uses discrete ZCD sensing (via R20/R21/R22/R23), VFF feedforward scaling (R12/R13), and PFC-OK status signaling (U1 pin 7) to support system-level sequencing.

Key Specifications

Availability

EVAL6563-400W is available at Aetrix Electronics and suitable for ATX power supply development, flat-panel display power architecture validation, and game console PSU qualification requiring stable component supply and documented reference design fidelity.

Supply support for EVAL6563-400W 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 across 30+ countries.

The L6563 product line targets cost-sensitive, high-efficiency AC-DC PFC applications up to 500 W, emphasizing fixed-off-time control simplicity, robust ZCD sensing, and compatibility with standard boost topologies in consumer and computing power supplies.

FAQ

What is the primary function of the EVAL6563-400W evaluation board?

The EVAL6563-400W is a fully assembled, tested reference design that demonstrates the L6563 PFC controller in a 400 W continuous conduction mode boost converter. It provides engineers with a working platform to validate input stage behavior, measure efficiency and THD, verify EMI filtering, and adapt the schematic/layout for custom power supply designs targeting ATX, display, or gaming applications.

Does the board include the L6563 IC, and what package is used?

Yes, the board integrates one L6563 IC (U1) in SO-14 package, as confirmed by the schematic and BOM. This controller implements transition-mode PFC with fixed-off-time regulation, ZCD-based current sensing, and integrated protections including overvoltage lockout and thermal shutdown-fully populated and functional on the PCB.

Can the EVAL6563-400W be used for 230 V_AC-only applications?

No-the board is explicitly characterized for universal input (90–265 V_AC) and validated across that full range per Table 1. Its FOT control loop, feedback divider (R14/R15/R16), and VFF network (R12/R13) are tuned for stable regulation and THD <5% at both low-line (90 V) and high-line (265 V) conditions, making it unsuitable for derated single-voltage use without re-tuning.

Is technical support available for adapting this board to a different output voltage?

Yes-Aetrix Electronics provides engineering support for modifying the EVAL6563-400W's output voltage setpoint, including recalculating the feedback resistor divider (R14/R15/R16), adjusting VFF scaling (R12/R13), verifying ZCD signal amplitude, and validating stability margins. Application note AN2485 contains the full design equations and compensation guidelines required for such adaptations.