Optoelectronics

LED power supplies target harsh environments

13th April 2015
Siobhan O'Gorman

250W AC/DC LED power supplies, which deliver high output currents even at high output voltages, have been released by Sunpower. The HLG-240H-C series, manufactured by Mean Well, feature universal 90-305 VAC inputs for use with 277VAC American industrial mains supplies. Operating with efficiencies of up to 93%, the power devices feature an active PFC function, which raises their power factor to 0.95. 

Fully potted in heat conductive silicone, the LED power supplies operate from -40 to +50°C at 110VAC input or -40 to +60°C at 230VAC input. The HLG-240H-C devices are housed in aluminium cases, IP65 or IP67 rated and can withstand vibration up to 5G.

Alongside 4kV surge immunity protection, the devices are offered with short circuit, overvoltage and over temperature protections. The LED power supplies are certified to UL, CSA and ENEC EN safety standards, and have EMC emission and immunity compliance certification.

Constant current output on the IP65 rated model can be adjusted by an internal potentiometer. The IP67 rated model is offered with a remote ‘3-in-1’ dimming function, enabled by either a 1-10VDC, 10V PWM or a resistance dimming signal, both of which are connected via a cable to the power supply.

“The HLG-240H-C series is a great demonstration of how LED lighting technology has come of age,” commented Andy Wall, CEO, Sunpower UK. ”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.”

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