Andover, Mass. - Vicor Corporation has expanded on its VIC-in-a-Brick 48-to-12 volt bus converter with a family of
nine intermediate bus converter modules (IBCs) that provide a fixed 3- to 48-volt output (3, 4, 6, 8, 9.6, 12, 16, 24, 48 volts) from a nominal 48-volt (38-55 V) input. These high-efficiency quarter-brick versions, delivering up to 100 amps or 600 watts, incorporate V • I Chip technology (July 7, p. 63) and provide a traditional brick-style bus solution for designers who at the same time desire greater familiarity with the company's new Factorized Power Architecture. That architecture represents a brick-free solution that utilizes one V • I chip as a so-called voltage transformation module (i.e., VTM, which in its narrow-input-range version is called a bus converter module, BCM).
The new IBCs double the power capability of previous generation IBC products; specifically, systems use either a single BCM, rated up to 300 watts, or two parallel BCMs, capable of 600 watts. They're rated for an output current of 50 or 100 amps, depending on the pin-out configuration.
These IBCs boast an efficiency of 95 percent at 3 volts to better than 97 percent at 48 volts. Full power is available with only 200 LFM cooling at +55°C (no heatsink). Using the company's proprietary sine amplitude converter (SAC) technology, the BCMs respond to a 100 percent step load change in less than 1 ms - that's 20 times faster than the fastest competitive brick, according to the company. The SAC technology also contributes to low input and output noise, significantly reducing or even eliminating costly, bulky filters.
VIC-in-a-Brick Intermediate Bus Converters are priced as low as 11 cents per watt in OEM quantities. Sample quantities of the 3 V at 50/100 amp (150/300 watt), 9.6 V at 240/480 watt, 12 V at 200/400 watt, and 48 V at 300/600 watt models are available now.