STMicroelectronics EVL6564-100W

Overview

EVL6564-100W from STMicroelectronics is a demonstration board implementing the L6564 10-pin transition-mode (TM) PFC controller in SSOP10 package, delivering 100 W with wide-range mains input (85–265 VAC), <3% THD at full load, and compliance to EN61000-3-2 Class D and JEITA-MITI standards. It features bidirectional 1/V² voltage feed-forward, adjustable overvoltage protection (OVP), and integrated inductor saturation detection for robust boost-stage operation.

For engineers reviewing the EVL6564-100W datasheet, EVL6564-100W application circuit, EVL6564-100W schematic, or EVL6564-100W evaluation board layout, this page provides verified pin-level interface details, measured performance data (input current waveform, efficiency, OVP response), thermal behavior under 100 W load, and design guidance for adapting the reference topology to 85–265 VAC AC-DC adapters, LED drivers, and server auxiliary supplies.

Technical Context

The EVL6564-100W implements a fixed-off-time transition-mode PFC preregulator using the L6564 IC, where zero-current detection (ZCD) on pin 7 triggers MOSFET turn-on, and current-sense comparator (CS) on pin 4 determines turn-off based on sensed source current. The 1/V² feed-forward path-via MULT (pin 3) and VFF (pin 5)-linearizes gain across line voltage, enabling stable THD <3% from 85 VAC to 265 VAC at 100 W output.

Protection functions are hardware-verified: OVP latches off at PFC_OK >2.5 V (pin 6), brownout disables at VFF <0.8 V (restarting at >0.88 V), and inductor saturation halts switching when CS exceeds 1.7 V (pin 4). The totem-pole gate driver (pin 9) delivers −600/+800 mA into a 12 V-clamped output, directly driving 600 V/2 A MOSFETs without external buffers.

Key Specifications

Availability

EVL6564-100W is available at Aetrix Electronics and suitable for high-efficiency AC-DC adapter development, LED luminaire power supply qualification, and EN61000-3-2 compliance testing requiring stable component supply and documented reference design validation.

Supply support for EVL6564-100W 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer applications.

The EVL6564-100W belongs to ST's Power Management Evaluation Board product line, engineered to accelerate time-to-compliance for PFC designs targeting IEC61000-3-2, JEITA-MITI, and ENERGY STAR requirements in sub-200 W systems.

FAQ

What input voltage range does the EVL6564-100W support?

The EVL6564-100W supports universal AC input from 85 VAC to 265 VAC, 47–63 Hz, as confirmed by test data in Figures 37–38 of DocID16202 Rev 5. Its L6564 controller uses bidirectional 1/V² feed-forward and brownout detection (VFF pin threshold: 0.8 V) to maintain stable operation and <3% THD across this full range without manual reconfiguration.

Does the board include overvoltage protection, and how does it behave?

Yes - the EVL6564-100W implements latched overvoltage protection via the PFC_OK pin (pin 6) of the L6564. When the divided output voltage exceeds 2.5 V, the controller stops switching and remains latched until VCC is cycled below 6 V or the PFC_OK voltage falls below 2.4 V, preventing sustained overvoltage stress on the bulk capacitor and downstream DC-DC stage.

Can the EVL6564-100W be used to evaluate inductor saturation protection?

Yes - the board validates the L6564's hardware-based inductor saturation detection. When the current sense voltage (CS pin 4) exceeds 1.7 V, the IC immediately halts switching, enters a safe idle state, and resumes only after the fault clears and the start-up timer expires (150–600 µs). This behavior is documented in Section 6.5 and Figure 32 of the datasheet.

Is the EVL6564-100W compatible with standard 100 W LED driver requirements?

Yes - the board delivers 385 VDC at 100 W with <3% THD and 93.5% efficiency, matching key requirements for commercial LED luminaires. Its wide-input operation (85–265 VAC), EN61000-3-2 Class D compliance, and built-in protections (OVP, brownout, saturation) make it suitable for evaluating constant-voltage LED driver front-ends, especially where high PF (>0.98) and low harmonic distortion are mandated.