Multiray: Designed for Versatility and High Performance
In the LSL-2025, the light engine is divided into two arrays of LEDs. Each array can be populated with a different color of LED source, selected from: whites, blues, greens, reds, and other colors; along with ultraviolet and infrared non-visible emitters. LED arrays can be fit with a choice of optics to produce a variety of beam patterns from a 115° wide flood to a 28° narrow spot. Two different light engine configurations exist: an 8-LED and a 32-LED. In both configurations, each array occupies half of the LED positions within the light engine (Figure 1). These layouts accommodate a wide variety of LED source and optic combinations.
Each array is connected to an output channel on the internal DC-DC constant current driver through a switching circuit expansion board. Intelligent microprocessor control allows the driver to power each array, and in some configurations, both arrays simultaneously. The control design allows the driver to power each array and to manage each channel’s operation (Figure 2). Three operating modes are available: channel 1, channel 2, or channels 1 and 2 combined (Figure 3).
The robust control logic in the Multiray driver ensures that the LED arrays operate at maximum performance, and manage potential electrical differences in each array of LEDs. The Multiray driver adapts dynamically when switching active channels for different forward voltage or forward current characteristics. The combined operating mode is available for arrays with matching forward voltage characteristics. This mode is generally limited to white LEDs which typically have the same forward voltage characteristics independent of the color temperature or other spectral characteristics.
Figure 2. Each array is controlled separately through a driver channel. The driver control switches between the color and beam pattern combinations configured in each light engine array
In cases where LEDs have a higher maximum drive current than others, the driver changes the peak drive current when switching between output channels. Full dimming and light controls are maintained for each array when switching between operating modes.