100W low profile open frame AC-DC converter series for industrial designs

December 09, 2019 //By Nick Flaherty
Cosel's LHA30F, LHA50F, LHA75F and LHA100F AC-DC converter series extend the existing LHA150F and LHA300F models downwards for industrial power designs from 100W down to 30W.
Cosel's LHA30F, LHA50F, LHA75F and LHA100F AC-DC converter series extend the existing LHA150F and LHA300F models downwards for industrial power designs from 100W down to 30W.

Japanese power supply maker Cosel has launched four open frame, low profile, compact AC-DC converter families ranging from 30W to 100W with UL/EN62368-1 safety certification.

The LHA30F, LHA50F, LHA75F and LHA100F extend the existing LHA150F and LHA300F models downwards for a range of supplies for industrial power designs from 30W to 300W.

The LHA30-50-75-100F power supplies have a typical efficiency up to 90 percent at full load and 86 percent at low load. A partial topology reduces noise and ripple levels and allows the LHA30-50-75-100F power supplies to automatically switch to an energy saving mode using intermittent pulse modulation.  The operating temperature range is from -10 to +70 ˚C.

The complete family is UL/EN 62368-1 certified for industrial applications, with an input voltage range of 85VAC to 264VAC single phase. The units have a 3,000VAC input to output isolation voltage, 2,000VAC input to ground and 500VAC output to ground.

Designed for use where space is often limited, the LHA30F measures 50 x 27 x 87.5mm (1.97 x 1.07 x 3.44 inches) and weighs 100g. The LHA50F measures 50 x 27 x 112mm (1.9 7 x 1.07 x 4.41 inches) and weighs 140g. The LHA75F comes in at 50 x 27 x 150mm (1.97 x 1.07 x 5.91 inches] and 190g, with the LHA100F at 62 x 27 x 155mm (2.44 x 1.07 x 6.10 inches] and weighs 250g

The 30W LHA30F is available in five output voltages, 3.3, 5, 12, 15 and 24V. Designed for an extended range of applications, the LHA50-75F is available in seven output voltages, 3.3, 5, 12, 15, 24, 36 and 48V, while the LHA100F comes in six output voltages, 5, 12, 15, 24 and 48V.

Standard products are delivered with a factory trimmed output voltage though it is possible to order the LHA30-50-75-100F with a built-in potentiometer making it possible to adjust the voltage up and down (option Y).

The power supplies include inrush current protection, over-current


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