AC-DC VPX power supply for 6U VITA chassis designs

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By Nick Flaherty

The VPX-6U-ACUNV universal AC input power supply delivers 630 W with an efficiency of 84% at 70ºC at the card wedge locks. The VITA 46 supply allows designs to power a VITA 62 chassis with the latest flexible, efficient and reliable VPX technology.

It is able to operate at wedge lock temperatures as high as 85ºC with de-rated output power. The VPX can be powered over a dual frequency range, 47 to 63 Hz and 360 to 800 Hz, with a power factor of 0.99 at 50/60 Hz and 0.97 at 400 Hz.

The power module is equipped with several features: integrated EMI filter, conduction cooling, five output voltages, over voltage, under voltage, short circuit and over temperature protections. It has an optional I2C communications (IPMI, PMBus, VITA 46.11) feature.  The VS1/VS2 (+12 V), VS3 (+5 V) and the +3.3 VAUX outputs can be load shared on a standard VITA 62 chassis. It has been designed for the most demanding military applications.  The VPX power supply unit meets VITA 46, VITA 47, VITA 62, MIL-STD-461F, MIL-STD-704 (B-F), and MIL-STD-810G standards.


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