New 75W convection-cooled switching regulated power supplies

27-02-2015 | Acopian | Power

Acopian Power Supplies has announced availability of the WN8B power supply.
The AC-DC single-output units provide up to 75W of output power, with
convection cooling (no fans required). The convection-cooled design
eliminates the need for fan maintenance, along with audible / ambient noise
and vibrations. Notably, the modules measure 1.7" (L) x 3.5" (W) x 8.8" (H)
and can therefore be mounted in tight spaces where most standard units will
not fit.

In addition to their narrow profile and small footprint, the WN8B power
supplies' current limiting capabilities make them ideal for a range of
applications in which high inrush loads are used. They are most commonly
employed in industrial automation, high-power LED lighting, test and
measurement equipment, broadcast equipment, gaming and point-of-sale
equipment, and IT equipment as well as in communications, motor control
power, and motorized entrance gates, shades and blinds.

The WN8B power modules operate from a universal input of 90-265 VAC, 49-420
Hz, single phase, or 110-350 VDC. They are offered with power factor
correction (PFC) of 0.99 at 115VAC, 60 Hz and full load, to ensure
compliance with EN61000-3-2. Units are available with 39 output voltages
ranging from 3.3V to 125V, and with a +/- 0.5V or +/- 1V user-adjustment
range. The output voltage may be controlled by an external 1K

The convection-cooled ambient operating temperature range is from 0C to
+71C, while power-saving efficiency is up to 81%. The supplies offer
universal input, PFC, high surge current capability, soft-start function,
cold-start function, input over-voltage, over-load, short-circuit
protection, output inhibit, input under-voltage, internal EMI filtering,
remote sensing, and thermal protection. A green LED output indicator is lit
when the supply is on (DC). Modules are CE Marked, and feature
general-purpose safety agency certifications per UL60950 and UL508. The
series further meets the conducted and radiated EMI requirements of EN55022,
Class A.

A metal case fully encloses all circuitry and provides EMI shielding, while
an AC input filter attenuates both common and differential mode noise
conducted to the line. The WN8 power supplies are delivered with threaded
mounting holes to permit mounting to a chassis, cabinet wall or bracket.
Units may also be used on a test bench or tabletop. Accessory mounting kits
for wall mounting or DIN-rail mounting are available, says the company.

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