COSEL's Low-Profile Open-Frame Power Supplies Drive Demanding Applications

December 9, 2019 Alix Paultre


Cosel added four Series of UL/EN62368-1 certified open-frame low-profile power supplies, covering the range from 30W to 100W. The LHA30F, LHA50F, LHA75F and LHA100F complement Cosel’s existing, leading LHA150F and LHA300F models, offering a power solution from 30W to 300W for demanding industrial applications. The LHA30-50-75-100F power supplies have a typical efficiency up to 90% high-line, and 86% low-line. 

By using partial resonance technology, noise and ripple levels have also been reduced, and the Series offers an operating temperature range from -10° to +70° degrees C. The power supplies have an input voltage range from 85VAC to 264VAC single phase (50/60Hz). The 30W LHA30F is available in five output voltages, 3.3V, 5V, 12V, 15V and 24V. The LHA50-75F is available in seven output voltages, 3.3V, 5V, 12V, 15V, 24V, 36V and 48V, while the LHA100F comes in six output voltages, 5V, 12V, 15V, 24V and 48V. 

Standard products have factory-trimmed output voltage though it is possible to order the LHA30-50-75-100F with a built-in potentiometer. An optimized switching topology provides an energy efficiency figure of up to 90%, and in standby, the LHA30-50-75-100F automatically switches to an energy-saving mode using intermittent pulse modulation. Features include inrush current protection, over-current protection with automatic recovery when the default is removed, and over-voltage protection. The units have a 3,000VAC input to output isolation voltage, 2,000VAC input to ground and 500VAC output to ground.

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