Power Electronics

Wide Input Range Brick Bus Converters With 98% Peak Efficiency

Available from Vicor as drop-in upgrades for industry-standard 5:1 and 4:1 converters, the new eighth and quarter bricks achieve up to 98% efficiency from a 36V to 60V input voltage range at power levels of up to 650W. With its wider input range, the IBC050 series also provides 2,250Vdc isolation from input to output.

The IBC050 series expands upon the 38V to 55V input range of recently announced IBC048 modules. The wider input range complies with ETSI EN300 132-2 for -48V telecom applications requiring 5:1 or 4:1 bus conversion from input voltages as low as 36V and as high as 60V. The higher input-to-output isolation complies with IEEE 802.3 Power-over-Ethernet (PoE) standards. Owing to their low effective output resistances, IBC050 series modules support output bus voltages of 7V to 12V (5:1) or 8.7V to 15V (4:1) over the line and load range.

IBC050 series modules, using Vicor's Sine Amplitude Converter™ topology, are pin-compatible with, technologically superior to, and offer higher performance than industry standard "square wave" bus converters, which are fundamentally limited by switching losses to low operating frequencies, low power densities and low bandwidth.

The new VI BRICK Bus Converters utilize the same Vicor patented ZCS/ZVS resonant converter technology that powers V.I Chips in high performance Factorized Power Architecture applications. Switching at approximately 10 times the frequency of square wave converters, IBC050 modules cut transient response time by a factor of 10, eliminating the need for external bulk capacitors. Superior power density and conversion efficiency enable competitive advantages for OEMs seeking to maximize performance across a range of applications, including telecommunications, computing, data storage, networking and Power-over-Ethernet.

Priced at less than $0.12 per Watt in OEM quantities, IBC050 modules are a cost-effective, high performance alternative to obsolete bus converters and DC-DC converters dissipating twice as much heat and taking up a larger volume obstructing air flow. Samples of IBC050 series bus converters are available from stock.

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