AC-DC Power Supplies improve Efficiencies and No-Load Performance

CUI Inc. announced today that it has expanded its VOF series of compact, open-frame ac-dc power supplies to include 100-, 120-, and 150-W versions. The single-output supplies are higher-power additions to their recently released series of second generation open frame power supplies, designed to provide a number of improvements over the company's previous offering, including higher efficiencies, improved no-load performance, and a boost in power.

The power supplies can accommodate a wide universal input voltage of 90- to 277-Vac at 47-63 Hz input, offering global compatibility for OEM manufacturers. They have been created to provide an industry leading combination of efficiency and competitive pricing, making the series suited for use in a wide range of ITE, industrial, and consumer electronics applications.

The new models offer output voltage options of 5-, 12-, 15-, 24-, 36- and 48-Vdc depending on the series. All models include output voltage adjustability of ±5% via an onboard potentiometer. The VOF-100 is rated for operation at 100% load with 6.7 CFM of forced air cooling from -20 to 50 degrees C, derating to 50% load at 60 degrees C. VOF-120 and VOF-150 models operate under convection cooling conditions at 100% load from -20 to 40 degrees C, also derating to 50% load at 60 degrees C.

All models are packaged in industry standard footprints. The 100W VOF series measures just 101.6 x 50.75 x 33.6 mm (4.00 x 2.00 x 1.32 in), while the 120W and 150W VOF models measure 127 x 76.2 x 33.1 mm (5.00 x 3.00 x 1.32 in.)

Reaching efficiencies of up to 90% and no-load power consumption as low as 0.25W, the VOF Series also carries UL/cUL and TUV 60950-1 safety certifications and are qualified for the CE mark, EN 55022 Class B, and FCC Class B EMI standards. Protections for over-voltage, over-current and short-circuit are included as well as primary-to-secondary isolation voltage of 3kVac. The VOF-150 series is also designed with active power factor correction. The new VOF series is available through distribution with prices starting at $36.28 per unit at 100 pieces.