New Industry Products

45W DC-DC Step-Up Constant-Current LED Driver with DALI Dimming

May 25, 2017 by Jeff Shepard

Mean Well has unveiled LDH-45-DA/WDA series of 45W step-up LED drivers in response to the increasing demands of DALI intelligent control applications. LDH-45-DA/WDA series remains the same housing design and electric features of LDH-45, but adding DALI dimming function. These constant-current dc-dc converters are available in pin style and wire style models with input voltage choices of 9- to 18-Vdc or 18- to 32-Vdc.

In addition, the new LDH-45-DA/WDA series is equipped with both pwm and analog dimming functions. The output current can be remotely ON/OFF controlled and adjusted by external pwm signal or a 0.25- to 8-Vdc voltage, which is able to fully satisfy the needs of LED lighting fixtures requiring dc input DALI intelligent control application.

Features and specifications include: Constant current output from 350mA to 1050mA; Wide output LED string voltage up to 126Vdc; Efficiency up to 95%; Built-in EMI filter, comply with EN55015 without additional input filter and capacitor; Short-circuit, over-voltage and under-voltage protection functions; Fully encapsulated and cooled by free air convection; Full-load operating temperature range is -40 to +60 degrees C for units with an input rating of 9- to 18-Vdc and -40 to +70 degrees C for units with an input rating of 18- to 32-Vdc.