STMicroelectronics EVAL6561-80

Overview

EVAL6561-80 from STMicroelectronics is an evaluation board designed to demonstrate the L6561 transition-mode Power Factor Correction (PFC) controller in 80W wide-input AC-DC applications. It supports universal mains (85–265V_AC), delivers 400V_DC output at 80W, achieves PF >0.999 and THD <2.9% (with optional THD reducer), and implements precise overvoltage protection with ±40µA dynamic OVP trigger.

For engineers reviewing the EVAL6561-80 datasheet, EVAL6561-80 pinout, EVAL6561-80 application, or EVAL6561-80 equivalent, this board enables rapid validation of L6561-based active PFC stages in electronic lamp ballasts, industrial SMPS, and wide-range AC-DC adapters - with measured efficiency up to 97.3% and thermal performance verified across full input range.

Technical Context

The EVAL6561-80 implements a complete transition-mode boost PFC front-end using the L6561 IC, featuring internal multiplier architecture optimized for high THD rejection across 85–265V_AC inputs. Its control loop integrates zero-current detection (ZCD), current-sense filtering, and dynamic/static overvoltage protection triggered at 40µA OVP current threshold.

Board-level design includes a custom E25x13x7 ferrite boost inductor (0.7mH primary, 1.5mm gap), STP8NM50 MOSFET gate driver stage, and configurable THD reduction network. The layout supports both standard and low-THD operation modes, with all critical compensation components pre-populated per ST's reference design.

Key Specifications

Availability

EVAL6561-80 is available at Aetrix Electronics and suitable for electronic lamp ballast development, industrial SMPS prototyping, and wide-input AC-DC adapter qualification requiring stable component supply and production-ready PFC validation.

Supply support for EVAL6561-80 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, delivering silicon solutions for automotive, industrial, and power management applications with vertical manufacturing and broad analog/mixed-signal IP.

EVAL6561-80 belongs to ST's Power Management Evaluation Kit product line, engineered specifically to accelerate adoption of its L6561 PFC controllers in energy-efficient lighting and industrial power conversion systems.

FAQ

What input voltage range does EVAL6561-80 support?

EVAL6561-80 operates across universal AC mains from 85V_AC to 265V_AC, as confirmed by Table 6 test data showing consistent 400V_DC output and PF >0.94 across all tested voltages. The board uses the L6561's transition-mode architecture and wide-range multiplier input to maintain regulation without manual reconfiguration.

Does EVAL6561-80 include THD reduction circuitry?

Yes - EVAL6561-80 includes a documented optional THD reduction network (labeled "THD REDUCER (optional)" in Figure 9), consisting of discrete components that lower harmonic distortion to ≤2.9% at 85V_AC. Performance comparison data in Table 6 shows measurable THD improvement with and without this section populated.

Can EVAL6561-80 be used to validate L6561 OVP functionality?

Yes - the board implements the L6561's dual-stage OVP (dynamic 40µA-triggered + static comparator), with external resistor divider R1/R2 setting the overvoltage threshold. Test results in Table 6 confirm stable 400V_DC output under normal operation and immediate shutdown during overvoltage stress, per L6561's internal OVP logic.

What MOSFET is used on EVAL6561-80?

EVAL6561-80 uses the STP8NM50 N-channel 500V/8A MOSFET (Q3 in Figure 9), selected to match the L6561's ±400mA gate drive capability and operate reliably in transition-mode boost topology at 80W. Its R_DS(on) and Q_g values are optimized for low conduction loss and fast switching with the L6561's totem-pole output stage.