STMicroelectronics STEVAL-ILL067V1

Overview

STEVAL-ILL067V1 from STMicroelectronics is an automotive-grade evaluation board implementing a six-channel LED driver based on the ALED7707 IC, featuring integrated boost conversion, 6 × 70 mA constant-current outputs, 6–32 V DC input range, and PWM dimming with 10 µs minimum on-time-designed for TFT LCD backlighting and interior ambient lighting systems.

For engineers reviewing the STEVAL-ILL067V1 datasheet, STEVAL-ILL067V1 pinout, STEVAL-ILL067V1 application, or STEVAL-ILL067V1 equivalent, this board enables rapid validation of multi-string LED driving with embedded fault detection (open/short LED), efficiency >90% at 12 V input, and synchronized switching up to 1 MHz in automotive lighting reference designs.

Technical Context

The board implements the ALED7707 monolithic LED driver IC, integrating a current-mode boost controller with six independent low-side current sinks, programmable switching frequency (630 kHz fixed or 1 MHz via resistor), and auto-recovery latched fault management for open-circuit and short-circuit LED conditions.

It supports single-wire PWM dimming (via DIM terminal), external clock synchronization (FSW/SYNC pins), and provides real-time monitoring points (AVCC, COMP) plus dedicated quiet ground (J4) and fault-indicator output (J6) for system-level diagnostics and EMI-constrained automotive integration.

Key Specifications

Availability

STEVAL-ILL067V1 is available at Aetrix Electronics and suitable for automotive interior lighting, infotainment TFT backlighting, and instrument cluster illumination requiring stable component supply, quick-turn prototyping, and production-ready reference validation.

Supply support for STEVAL-ILL067V1 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, delivering innovative solutions across automotive, industrial, and consumer markets with strong focus on functional safety and AEC-Q100 compliance.

This board belongs to ST's STEVAL (ST Evaluation) series, designed to accelerate development of automotive lighting subsystems using ST's analog and power IC portfolio-including ALED7707-based LED drivers optimized for high-reliability interior and display applications.

FAQ

What input voltage range does STEVAL-ILL067V1 support?

The board accepts 6 V to 32 V DC input, covering nominal 12 V automotive systems, cold-crank down to ~6 V, and transient overvoltages up to 32 V. It uses the ALED7707's integrated boost converter to generate regulated VBOOST up to 36 V for LED strings, eliminating need for external high-voltage supplies.

How is PWM dimming implemented on this board?

PWM dimming is applied directly to the DIM terminal (J7) with 3.0–5.0 V amplitude, 100 Hz–20 kHz frequency, and ≥10 µs minimum pulse width. Removing SW4 jumper isolates the internal +5 V bias, allowing external signal control. The ALED7707 modulates all six channels synchronously with no phase delay between strings.

Does STEVAL-ILL067V1 support fault reporting and recovery?

Yes-it detects open-LED and LED short-circuit faults via internal sensing, asserts the open-drain FAULT pin (J6), and latches off until EN is toggled low (via SW3 pushbutton). This behavior complies with automotive fail-operational expectations and enables diagnostic logging in host microcontrollers.

Can the switching frequency be adjusted or synchronized externally?

Yes-SW1 selects between 630 kHz (FSW tied high) or 1 MHz (FSW biased by R5). An external clock (≤30% duty cycle) can be injected via J9 (FSW) when SW1 is in upper position; J5 (SYNC) outputs the internal oscillator signal for multi-board synchronization in larger lighting arrays.