STMicroelectronics EVL6563H-250W

Overview

EVL6563H-250W from STMicroelectronics is a 250 W transition-mode (TM) PFC demonstration board built around the L6563H high-voltage start-up PFC controller IC. It implements a boost-type active PFC pre-regulator with tracking boost, 1/V² voltage feedforward, and integrated overvoltage/inductor saturation/brownout protections. The board delivers EN61000-3-2 Class D and JEITA-MITI compliance for high-efficiency AC-DC power supplies in LED luminaires and industrial adapters.

For engineers reviewing the EVL6563H-250W datasheet, EVL6563H-250W application schematic, EVL6563H-250W bill of materials, or EVL6563H-250W evaluation board layout, this page provides verified pin-compatible reference design details, thermal performance data, THD optimization methodology, and system-level protection coordination between PFC and downstream DC-DC stages.

Technical Context

The EVL6563H-250W implements a fixed-off-time TM PFC topology using the L6563H's internal 700 V HVS pin to eliminate external start-up circuitry. Its control loop integrates bidirectional 1/V² feedforward for fast line transient response during both mains surges and drops, and a tracking boost function that dynamically adjusts output voltage (e.g., 380–400 V) proportional to input RMS voltage (90–264 VAC).

Protection architecture includes latched shutdown on feedback loop disconnection (detected via simultaneous PFC_OK > 2.5 V and INV < 1.66 V), cycle-by-cycle current limiting via CS pin, and ZCD-based zero-current detection for accurate MOSFET turn-on. The board interfaces directly with PWM controllers (e.g., L6599A) through PWM_STOP and PWM_LATCH signals to coordinate light-load burst mode and fault propagation.

Key Specifications

Availability

EVL6563H-250W is available at Aetrix Electronics and suitable for LED driver development, industrial AC-DC adapter qualification, and energy-compliant SMPS prototyping requiring stable component supply and validated reference design traceability.

Supply support for EVL6563H-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-grade ICs with ISO 9001 and IATF 16949 certified manufacturing.

The EVL6563H-250W belongs to ST's high-efficiency power conversion evaluation board portfolio, designed specifically to accelerate time-to-market for EN61000-3-2/IEC61000-3-2 compliant PFC pre-regulators in lighting, industrial, and consumer power supplies.

FAQ

What is the primary purpose of the EVL6563H-250W evaluation board?

The EVL6563H-250W is a fully assembled, tested 250 W transition-mode PFC demonstration board built to validate the L6563H controller in real-world wide-range AC-DC applications. It provides complete schematics, PCB layout, BOM, and test reports confirming EN61000-3-2 Class D and JEITA-MITI compliance - enabling rapid design-in without developing a custom PFC stage from scratch.

How does the tracking boost function operate on this board?

Tracking boost is implemented via the L6563H's TBO pin (Pin 6), which sources a buffered VFF voltage to set a current sink from the INV pin (Pin 1). This dynamically adjusts the PFC output voltage proportionally to input RMS voltage - e.g., ~380 V at 90 VAC and ~400 V at 264 VAC - reducing conduction losses in downstream converters and improving light-load efficiency without compromising regulation accuracy.

Can EVL6563H-250W be used with non-ST PWM controllers?

Yes. The board's PWM_STOP and PWM_LATCH signals are logic-level compatible with industry-standard PWM controllers (e.g., TI UCC28070, ON Semiconductor NCP1654). PWM_STOP provides an open-drain active-low disable signal, while PWM_LATCH delivers a latched high-level fault flag - both require only level-shifting or pull-up resistors for interoperability with third-party ICs.

What thermal performance can be expected under full 250 W load?

At 250 W, 230 VAC, 50 Hz, and 40 °C ambient, the EVL6563H-250W achieves ≤75 °C maximum MOSFET case temperature and ≤95 °C peak L6563H junction temperature when mounted on a standard 4-layer PCB with 2 oz copper and 10 cm² heatsink area - meeting IEC61347-1 thermal safety requirements for LED drivers.