Constant current LED drivers for low-power intelligent lighting systems

The LCM 25(DA) is the latest addition to the LCM series which already includes 40W and 60W constant current products. Its output, while maintaining a constant current to meet LED requirements, can be flexibly set to different levels from 350mA to more than 1A by a built-in DIP switch.

A two-in-one dimming function in the LCM-25 can be driven either by 0-10Vdc or by PWM control inputs. The digital LCM-25(DA) is additionally equipped with a DALI interface and pushbutton dimming function. LCM-25(DA)s can be synchronised so that up to ten of these LED drivers can be simultaneously controlled from a single dimming command.

The LCM-25(DA) operates from 180 – 277Vac input and, with built-in active PFC, meets the harmonic current limitation set by EN61000-3-2 Class C (> 50 percent load). In line with related luminary requirements, it also has 2kV heavy-industry surge-level immunity between line and neutral. With next-generation circuit design, the LCM-25(DA) provides up to 86 percent efficiency, allowing cooling simply by free air convection in ambient temperatures from -30°C to +60°C. No-load power consumption is less than 0.5W.

The LCM-50(DA) is a rectangular, low profile (23mm) fully insulated IP20 rated plastic enclosed power supply offering a unique feature for ease of installation; unlike the industry standard design of inputs at the front and outputs at the rear, all LCM-50(DA) I/O connections are along one side of the enclosure. This enables easy access, with efficient use of limited space during installation and wiring.

The supplies feature Class ll design with no frame ground and protection from short circuit and over temperature. International lighting safety regulation certification includes UL8750, CSA C22.2 No. 250.0-08, ENEC EN61347-2-13, and EN62384. Additionally, the LCM-25DA complies with IEC62386-101, 102 and 207 norms for DALI lighting control systems.