The DALI dimmable LMI LED driver is a compact and efficient constant current driver specifically tailored for integration into Class III luminaire systems. Operating exclusively with Tridonic 48 V DC string LED drivers due to its PLC-based communication technology, it ensures precise and stable control performance. Compatibility with 48 V drivers from other manufacturers cannot be guaranteed, reinforcing its specialized optimization within Tridonic ecosystems. The driver achieves up to 93.5% efficiency, maintaining exceptional electrical performance while supporting an adjustable output current range between 350 and 700 mA and an output voltage range from 20 to 42 V. Its pure amplitude modulation (AM) dimming method enables smooth and flicker-free dimming down to 5%, making it ideal for applications demanding consistent light quality across low brightness levels.
Constructed as a pure PCB unit, the LMI driver is intended for built-in applications where compact size and minimal thermal footprint are critical. Its thermal management allows a maximum casing temperature of 105 °C, ensuring reliability even in thermally constrained environments. The module is classified for Class III operation, supporting safe integration in extra-low-voltage lighting systems. The DALI DT 6 interface provides digital addressable control, enabling precise dimming and configuration within DALI-based lighting networks. Electrical connectivity is supported through 0° push terminals for straightforward installation and maintenance.
The driver incorporates multiple protective functions, including overtemperature, short-circuit, and no-load safeguards, ensuring operational stability and component longevity. Its adjustable output current functionality allows fine-tuning of light output and compatibility across various LED module configurations, creating an application-oriented operating window. The unit’s compact form factor — 75 mm in length, 23.8 mm in width, and only 8.4 mm in height — supports the ongoing miniaturization of luminaires, offering flexibility for integration into slimline or architectural fixtures.
Powered by a 48 V DC input with an operational range between 46 and 50 V, the driver draws a typical current between 170 and 645 mA under full load and consumes less than 0.4 W in no-load operation. It delivers an output power range of 7 to 29.4 W, achieving a start-up time of under 0.6 seconds and a power failure hold time below 0.005 seconds. Its output current tolerance is maintained within ±3% under normal conditions and ±7.5% at minimum dimming levels, while the low-frequency ripple corresponds directly to the 48 V bus, ensuring consistent output stability. The driver supports a dimming range of 5% to 100%, maintaining visual uniformity across all brightness levels.
The LMI LED driver carries an IP00 protection rating and an ESD classification of severity level 2, reflecting its suitability for controlled indoor installations within luminaire assemblies. Its lifetime reliability is further supported by a five-year guarantee, backed by Tridonic’s stringent manufacturing standards. Combining compact dimensions, configurable performance, and robust protection features, the LMI DALI dimmable driver stands as a precision solution for modern lighting systems requiring space efficiency, control versatility, and dependable electrical operation.
https://www.tridonic.com/en/int/product/25629
