The DALI dimmable LMI LED driver is a compact, high-efficiency module purpose-built for integration into class III luminaires. Operating exclusively on 48 V DC input, it is specifically compatible with Tridonic 48 V DC string LED drivers due to its use of PLC communication technology. Compatibility with 48 V drivers from other manufacturers is not assured, and error-free performance cannot be guaranteed in such cases. With a typical efficiency of up to 90%, this driver ensures reliable power conversion while maintaining excellent operational stability. Its adjustable output current, configurable between 700 and 1,050 mA, supports an output voltage range of 3 to 20 V, allowing it to adapt to various LED configurations. The driver employs pure amplitude modulation (AM) dimming, enabling smooth and flicker-free light control down to 5% brightness, making it ideal for applications requiring fine-tuned lighting levels.
Constructed as a pure PCB for built-in applications, the driver is optimized for luminaire miniaturization and efficient heat dissipation. It supports a maximum case temperature (tc point) of 105°C, ensuring robust thermal performance even under demanding operating conditions. The LMI driver conforms to IP00 protection and ESD severity level 2, suitable for integration into enclosed lighting assemblies. Compact in size at 125 mm in length, 14.8 mm in width, and 12.5 mm in height, it allows maximum flexibility in design and space utilization within luminaire housings.
The electrical characteristics of the driver highlight its reliability and precision. It operates from a DC voltage input of 48 V, within a permissible range of 46 to 50 V, consuming a typical current between 64 and 476 mA at full load. Power consumption in no-load conditions remains minimal at under 0.4 W, while the maximum rated power reaches 23.5 W. The driver’s rated output power spans from 2.1 to 21 W, supporting a wide operational window for different LED configurations. The start-up time at full load is less than 0.6 seconds, with a rapid hold-on duration of under 0.005 seconds during power interruptions, ensuring stable light output and consistent system behavior.
Output precision and dimming performance are critical strengths of this driver. It maintains an output current tolerance of ±3% under standard conditions and ±7.5% at minimum dimming levels. The low-frequency (LF) current ripple directly corresponds to that of the 48 V bus, preserving light quality across dimming levels. Its dimming range of 5–100% ensures flexibility for both general and ambient lighting applications controlled via the DALI (DT 6) interface.
Integrated protective features provide additional reliability, including overtemperature, short-circuit, and no-load protection, safeguarding both the driver and connected LEDs from electrical and thermal stress. Terminal blocks utilize 0° push terminals for easy and secure connections. The driver’s small form factor, efficient operation, and adjustable output parameters make it a practical solution for modern architectural, commercial, and task lighting systems that prioritize compact design, precise dimming control, and long-term durability. Supported by a 5-year guarantee, the LMI LED driver offers a dependable foundation for high-quality, DALI-controlled lighting environments.
https://www.tridonic.com/en/int/product/25538
