STMicroelectronics EVL6562A-LED

Overview

EVL6562A-LED from STMicroelectronics is a demonstration board implementing an L6562A-based constant-current inverse buck LED driver for multi-string street lighting applications. It delivers 0.35 A average output current at 48 V nominal input, supports digital shutdown/dimming via TTL-level D_Dimm pin, and features analog current setting (0–12 V) on C_Set with <140 mA ripple. The board operates in continuous conduction mode and includes open-/short-circuit protection.

For engineers reviewing the EVL6562A-LED datasheet, EVL6562A-LED pinout, EVL6562A-LED application, or EVL6562A-LED equivalent, this page provides verified interface definitions, measured performance data (efficiency, dimming linearity, switching frequency), protection behavior, and design context for evaluating its use in industrial LED driver reference designs.

Technical Context

The EVL6562A-LED implements a fixed-off-time (FOT), peak-current-mode controlled inverse buck topology using the L6562A PFC controller IC. It operates with 1.32 µs nominal toff (1.57 µs actual), achieves >85% efficiency across 36–60 V input range, and maintains ±5% LED current regulation under varying LED string voltage (VLed).

Current control is achieved via adjustable CS-pin threshold using external resistive network (R19/R14) and C_Set analog voltage (0–12 V), enabling precise I_Led tuning from 0 to 350 mA. Protection functions include cycle-by-cycle overcurrent detection, automatic short-circuit latch-off, and open-load detection via sense-resistor monitoring.

Key Specifications

Availability

EVL6562A-LED is available at Aetrix Electronics and suitable for LED street lighting, industrial signage, and architectural accent lighting requiring stable component supply, rapid prototyping validation, and reference design reuse.

Supply support for EVL6562A-LED 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 specializing in power management, analog, microcontrollers, and automotive-grade ICs, with strong focus on energy-efficient system solutions.

The EVL6562A-LED belongs to ST's LED driver evaluation platform family, designed to accelerate development of high-reliability, electrolytic-capacitor-free constant-current drivers for outdoor and industrial solid-state lighting.

FAQ

What is the function of the C_Set pin on EVL6562A-LED?

The C_Set pin accepts a 0–12 V analog voltage to set the LED average current from 0 to 350 mA. Internally, it adjusts the L6562A's current-sense comparator threshold via a resistor divider (R19/R14), enabling precise, calibration-free current programming without trimming potentiometers or DACs.

Does EVL6562A-LED support PWM dimming, and how is it implemented?

Yes - EVL6562A-LED supports digital PWM dimming via the D_Dimm pin. A TTL-compatible square wave applied to D_Dimm modulates the LED current by enabling/disabling the switching cycle. Measured dimming range spans 1% to 99% with linear response up to 90%, verified in AN2983 Figures 16–20.

Can EVL6562A-LED drive multiple parallel LED strings?

No - EVL6562A-LED is a single-channel constant-current sink designed for one LED string. Its LEDs_A/LEDs_K terminals connect to one anode/cathode pair. Driving multiple strings requires separate EVL6562A-LED boards or a master controller coordinating multiple modules, as described in Section 1.1 system configuration.

What protection features are implemented, and how do they behave during fault conditions?

EVL6562A-LED implements open-circuit detection (no current flow triggers disable) and short-circuit protection (excessive current latches off the MOSFET until reset). During short-circuit, the board enters hiccup mode: it shuts down, waits ~100 ms, then attempts restart. This prevents thermal damage and enables safe field recovery without manual intervention.