Standard LED drivers (buck topology) require that the input voltage be higher than the output voltage.
This may result in problems when working with the newest high-power LEDs and powering them from low-voltage sources like solar cells or batteries.
Buck driver solutions which must always have a higher input voltage than an output voltage, typically result in designs that require multiple drivers for multiple LED strings with lower forward voltages.
This problem has been solved with the introduction of RECOM Lighting’s new buck/boost LED driver which can deliver high voltages (up to 40 V) from a low-voltage source (as low as 8 V), simplifying the lighting system with the use of a single driver and a long single string of LEDs.
The new RBD-12 series supplies LEDs from 3 to 20 W with input voltages from 8 to 36 V, providing constant currents of 350 mA or 500 mA. The output voltage can be above or below the supply voltage by a factor of 2 (500 mA) or by a factor of 3 (350 mA), within the range from 2 to 40 V d.c.
These new buck/boost driver models are digital (PWM + remote on/off) and analog dimmable, and cover the temperature range from -40°C to +75°C. Dimensions are 32,6 x 16,6 x 11,1 mm (L x W x H) and weight is only 13 grams.
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