STEVAL-ILL035V2

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STEVAL-ILL035V2 is an evaluation board from STMicroelectronics that facilitates the testing, evaluation and development of a high-efficiency, low-cost, low heat dissipation, flexible lighting solution for applications ranging from general lighting to automotive headlights. This board is a mix of a buck converter, a DALI (Digital Addressable Lighting Interface) addressable low voltage reliable command/response protocol, a patented current regulation technique, and a multi-channel dimmer.

The STEVAL-ILL035V2 application field is focused on evaluating the driving performance of automotive headlights or other general lighting applications that require dimming and color temperatures control. The board’s flexible solution enables the user to select the most suitable automatic current regulation technique by setting the cycle-by-cycle soft dimming and analog dimming features.

The board’s patented constant current regulation demonstrates seamless transitions within different levels of dimming, with no flickering and near-instantaneous light-on time.

Utilizing a versatile operating range from 9V to 36V and a wide range of output currents from 25mA to 350mA, the STEVAL-ILL035V2 provides the user with limitless LED combination possibilities. The built-in LED current measurement and diagnostic capabilities further enhance this versatility.

The STEVAL-ILL035V2 working principle focuses on providing a complete, efficient and cost-effective LED driving solution for automotive headlights or other general lighting applications. The board features a single-stage converter circuit that powers three LED channels individually, each with its own current measurement and diagnostic station. The board’s soft-start circuit prevents it from inrush current, while its frequency-hopping technology ensures that the LED current is stable and smooth during operation, eliminating the risk of channel shorts and overcurrents.

The STEVAL-ILL035V2 utilizes a feedback-based switching technique to regulate the current and reduce power dissipation. The combination of the feedback circuitry, the external component selection, and the thermal characteristics of the board, results in a reduction of up to 70% of total power dissipation.

The DALI interface on the STEVAL-ILL035V2 allows the user to control the LED channels from an external device. The board can be set up to run in either a master or slave mode, giving the user the flexibility to operate the board with a variety of different DALI devices.

The STEVAL-ILL035V2 is ideal for a wide variety of lighting applications, from automotive headlights to general lighting, thanks to its high efficiency, low cost, low power dissipation and versatile mixing capabilities.

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