High efficiency LED power supply for challenging environments

The products operate with ultra-high efficiencies of up to 93%, while their active PFC function raises their power factor to typically 0.95. Large LED light arrays are supported by different models with constant current outputs from 700mA to 2100mA at corresponding voltages from 59VDC to 357VDC.

The HLG-240H-C series has a number of reliability and safety features that equip it for environmentally demanding applications. With their high efficiency levels and full potting in heat conductive silicone, the products can operate from -40°C to +50°C at 110VAC input, or from -40°C to +60°C at 230VAC input; both these specifications apply without derating and with free air convection. Additionally, they are housed in aluminium cases rated to IP65 or IP67 moisture and dust ingress protection, and can withstand vibration to 5G.

4kV surge immunity protection is also provided, as well as protection from short circuit, overvoltage and over temperature. The units are certified to UL, CSA and ENEC EN safety standards, and have EMC emission and immunity compliance certification. These features allow operation both within buildings and outdoors – including harsh mobile and marine applications.

Constant current output on the IP65 rated model can be adjusted by an internal potentiometer, while the IP67 version offers a remote ‘3 in 1’ dimming function. A 1-10VDC, 10V PWM or resistance dimming signal can be connected via a cable to the power supply.

The products are now finding their way into applications such as lighting for harbours, streets, fishing vessels and factory bays as well as building architectural lighting – in fact anywhere that might previously have been illuminated by incandescent, fluorescent or halogen solutions.