STMicroelectronics STEVAL-ISF001V2

Overview

STEVAL-ISF001V2 from STMicroelectronics is a 3 kW fixed-off-time (FOT) boost-type PFC demonstration board built around the L6563S controller and STW88N65M5 650 V, 88 A SuperMESH™5 MOSFET. It delivers 400 V ±5% output at >95% efficiency, power factor >0.98, THD <10% from 1 kW, and features inductor saturation protection and EN55014/EN55022-compliant EMC filtering for single-range 185–265 V_AC, 50/60 Hz input.

For engineers reviewing the STEVAL-ISF001V2 datasheet, STEVAL-ISF001V2 pinout, STEVAL-ISF001V2 application, or STEVAL-ISF001V2 equivalent, this board serves as a validated reference for high-power domestic PFC design, enabling rapid evaluation of FOT control architecture, continuous-mode-equivalent current shaping, and compact high-efficiency AC-DC front-end implementation.

Technical Context

The board implements a fixed-off-time, variable-frequency PWM modulation scheme-ST's patented FOT technique-enabling transition-mode ICs like the L6563S to emulate continuous conduction mode (CCM) current waveforms without CCM-specific controllers. This reduces system cost and complexity while maintaining low THD and high PF.

Core topology is boost PFC with active power factor correction, using the STW88N65M5 MOSFET in the main switching path and the L6563S for voltage-mode control with zero-current detection, cycle-by-cycle current limiting, and integrated soft-start. Input rectification is full-wave; output is regulated via feedback from the 400 V DC bus.

Key Specifications

Availability

STEVAL-ISF001V2 is available at Aetrix Electronics and suitable for high-efficiency AC-DC front-end development, industrial PFC validation, and domestic appliance power supply qualification requiring stable component supply and reference-grade design fidelity.

Supply support for STEVAL-ISF001V2 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, designing and manufacturing microcontrollers, analog ICs, power devices, sensors, and digital ICs for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series-engineered to accelerate prototyping and validation of ST's proprietary power architectures, especially innovative control methods like FOT PFC for cost-sensitive, high-performance power conversion.

FAQ

Is STEVAL-ISF001V2 still in production?

No-STEVAL-ISF001V2 is marked "Obsolete Product(s)" in its official ST document (Doc ID 023212 Rev 1, May 2012). It remains available through authorized legacy distributors and Aetrix Electronics for design continuity, repair, and educational use, but no new revisions or manufacturing are planned.

What is the role of the L6563S on this board?

The L6563S is the dedicated PFC controller IC implementing ST's Fixed-Off-Time (FOT) modulation. It provides voltage-mode regulation, zero-current detection, cycle-by-cycle current limiting, soft-start, and overvoltage protection-enabling CCM-like performance using a transition-mode controller.

Can STEVAL-ISF001V2 be used with 110 V AC input?

No-it is designed exclusively for 185–265 V_AC single-range operation. The input rectifier, bulk capacitor rating, and control loop compensation are optimized for this range; 110 V_AC operation would result in insufficient hold-up time, unstable regulation, and potential overcurrent on the STW88N65M5.

Does the board include isolated gate drive for the MOSFET?

Yes-the STW88N65M5 is driven via an isolated gate driver stage using a pulse transformer, ensuring safe high-side switching in the boost configuration and providing galvanic isolation between control logic and power ground.